Bad Eec Relay Symptoms

just need to know if its possible for the pump to sometimes work and still be bad. If the EEC relay is bad, the EEC won't turn on. A hose or manifold might be loose or cracked, which will disrupt the fuel/air ratio in. You can find this tutorial in Spanish here: Cómo Probar el Sensor MAP de Ford (4. 0 Mustang to MegaSqurt adapter harnesses lets you plug the MegaSquirt into any 1986-1993 5. You need wiring diagrams for the fuel pump and the starter circuitry. The Starter relay is a no brainer as is the Fuel pump relay. General Information This service bulletin contains information on all proprietary Bulkhead Module (BHM) fault codes for J1587 and J1939 data bus protocols, how to view these codes, and what they mean. It will start, run about 2 seconds, then dies. Although I recommend a few quick tests before you replace the part, if your distributor mounted ignition module looks like the image on the right you probably just found your failed component. I dont think EEC IV used IDM before 85 or 86. A 4 terminal relay is used so a low power circuit may engage a high power circuit without risk of damage to the low power control circuit. picking a cummins engine There are three types of fuel systems used on the 5. I will take a look at how it works. It may be a bad connection on the solenoid, or the link may be bad. Redundant speed control switch, Heated PCV (5. Here is the problem I am currently fighting. i changed my computer today and every thing went back to normal. If you got a code 14, the computer already diagnosed a bad or failing pip sensor. Here is the problem I am currently fighting. Chances are, the wire has rubbed against something and the insulation is chafed or broken, exposing the bare wire, or there is something improperly connected. It may be a bad connection on the solenoid, or the link may be bad. Remove the push-on connector from the relay and, using a jumper wire, jump from the now exposed terminal on the starter relay to the main terminal (battery side or battery positive post). Re: Bad relay? really should start a new thread for sure, it's similar symptoms, but I'm not sure what you've looked so far based on your description. i havent checked to see if the relay is sticking. the red wire provides power to the idle air control. It's by the battery on the hot side of the starter solenoid. Is the regulator stock? Has the fuel pump relay been replaced before? If it has was the relay an orignal Ford relay? Aftermarket replacements (especially GP Sorensen) aer garbage and can make a fuel pump run continuously. Identifying and legend fuse box Ford E150, E250, E350 1988-1993. Unplug the Engine Oil Temperature sensor and turn the key to the run position. Check out free battery charging and engine diagnostic testing while you are in store. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby by creating a spark. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby by creating a spark. Cranks all day long but will not fire. The fuse is called: Fuel System/Anti-theft Maxi-fuse. The task was sometimes messy. EEC power relay? Where is it? I am having the engine shutdown trouble that seems pretty common with the EEC 5. All Electronic Engine Control (EEC) systems utilize speed sensor information in one way or another. Speaking of my four-ways Is the "relay" the same one as the turn signal. Some of you may remember the difficulty I had with the old 302 that was there. The US Hella number is 87412. Vertical Visions repairs approximately 250-300 TIPMs each year. A single click from under the hood on an attempted start could mean a bad starter relay. i have tried another brand new distributor and tfi, still. I turned my ignition forward (after replacing my fuel pumps) and the pump started with the key forward, the truck started right up. This 1995 F150 primes the fuel pump for too long when cold, a sign that the EEC-IV computer is starting to fail. 00 eBay determines this price through a machine learned model of the product's sale prices within the last 90 days. the ecm relay may allow silicon vapor to form and, over time, the silicon evaporates from the diode molding which causes silicon oxide to develop on the ecm relay contact due to arcing. This is located under the. A properly selected fuse will protect the starter under short-circuit fault conditions. Everything was working fine ie. It runs, but very rough. So V=10(1) thus making the voltage drop a whopping 10V. Make sure the EEC relay is good. (2) When you use your left blinkers, the blinkers get stuck to the "On" position and doesn't blink. If 8, 10, 13 and 15 are present (this requires the key to be on), but 12 and 24 are not showing 12 volts, that suggests a bad EEC relay inside the CCRM. When the ignition switch is ON, it turns the EEC power relay ON. It will start, run about 2 seconds, then dies. 0L Ford Taurus (1996-1997 3. Automatic Shutdown Relay. Coworker installed an alternator in a Mustang this afternoon - bad right out of the box. Often “current limiting” type fuses are specified, in industrial/comercial applications, due to high available fault curre. 94-95 models only: EEC or PCM power relay in the constant control relay module. What is a EEC relay on a Ford ranger 1987What does EEC stand for - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. Chevy Dude 1,403,211 views. It is located inside the distributor. With the key-on, you can jump terminal #6 on the EEC test connector to a ground and it should power the fuel pump. You should have 12 volts at the dark green/yellow wire at the fuel pump relay. Last Revised: 12/17/2002. Or, let's make bets about what ends up being wrong. A failed relay will disable the dash lights and warning chimes that normally come on when the key is inserted into the ignition, and will probably be unable to start or turn over the vehicle. If the eec relay is bad or the relay plug, U will first off have no checkengine light no fuel pump prime or power and the injectors wont fire. my car for some reason will just quit while i am driving down the road. I am a service manager of a small copier company in Chatsworth, CA. You can also find other images like fuel pump location,sensor location,fusible link location,fuse box location,ecm motor,ecm diagram,ignition module location,ecm fuse location, and others. in most you should see power instantly some it will turn off, but while cranking it should be on. All warnings lights and gauges should be on. So replace your bad starter relay solenoid with a brand new Ford OEM Starter Solenoid to for reliable starts. While spark plugs, ignition coils and distributors are the recognizable "stars" of the ignition system, there would be no combustion and an engine wouldn't run without the unseen and less glamorous utility players in the system - the relays, sensors, switches, and control units. Dealer replaced fuel pump, electronic engine control (eec) relay on separate occasions. Generally located in the plastic housing between the engine and the air filter, the MAF sensor measures the volume and density of. 1984-1996 C4 Corvette Fuel Sending Unit Installation. Here's How To Find Those Frustrating Electrical Shortcuts To Ground. The major sign is that it will give erroneous or non-existent codes when you scan the ECM with a code scanner. Vehicles & accessories; Motor vehicle accessories & components; Engine; Ford Powertrain Application 1981-2004. etc Customer Reviews:. Need some input from the fuel injection gurus out there. Or do it yourself with the procedure posted. I've also tried the local Ford dealership and was told that even they no longer carry my computer. All 3 times same problem: the truck will be driving fine and all of a sudden the truck dies and will not start. 0 Please make sure to hold your device horizontally (like a camera) rather than vertical (like a phone). When the pedal is released and on autos with the jumper cover installed, the EEC always receives a (high-resistance) ground signal on that wire through the starter relay windings. jpg Diagnostic Link Connectors for EEC-IV processors ('84-95). The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Unbalanced voltages at motor terminals cause phase current unbalance ranging from 6 to 10 times the percent voltage unbalance for a fully loaded motor. Plastic changes can also be harmful and cause symptoms and signs of disorders such as some forms of chronic pain (central neuropathic pain) and severe. Also, since these cars are getting up there in age these symptoms are also common when the EEC-IV power relay goes bad. When you tried to start it, did you have another relay to install into the fuel pump socket? Also, bad brand new relay. The truck is a 1990 F250 with a 7. 3) after power disappears, no spark ( because no power!) 4) leave ign off for 30 mins. If you see a symptom that looks familiar, read on to find out what a possible fix can be. but it also supplys turn on current for the fuel pump relay coil. Chances are, the wire has rubbed against something and the insulation is chafed or broken, exposing the bare wire, or there is something improperly connected. An oxygen sensor gone bad impacts your car's engine performance. The EEC relay also is in the line to switch power to the tfi isn't it. At this point I guess the only things I need to address is the slight miss and my four-way flashers. Power for the fuel pump(s) is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). EEC-IV code readers are fairly inexpensive and can help. The list of symptoms and possible causes below should help you get a better idea of what's causing your engine to act up. I turned my ignition forward (after replacing my fuel pumps) and the pump started with the key forward, the truck started right up. *** This vehicle, 05' Ford F150 5. Any way I’m not getting any work done just thinking about what could be the cause of my problem. I couldn't get it to start back up. Symptoms: 1) ign on, power to everything for 2 secs, and then power off ( good so far) 2) attempt to start, power disappears. when i turn the key nothing happens. looking to find some common symptoms here, thanks. by Bob O’Neill and Bob Lincoln. The ECM power relay is the relay responsible for sending power to the ECM. i have tried another brand new distributor and tfi, still. Problem: Rattling noises from engine at startup. From what I have read that means that the relay and inertia switch are working as they should. The EEC relay also is in the line to switch power to the tfi isn't it. PCM part # is R130011. Vehicle started up immediately after placing in "park" position. Generally located in the plastic housing between the engine and the air filter, the MAF sensor measures the volume and density of. If the EEC won't turn on, the fuel pump relay won't get grounded and won't turn on. Do not attempt to connect them, you will ruin the module, wiring, and/or coil. There is a small black relay, IIRC just behind the battery, that must be maintained through the ignition switch that feeds power to the ignition coil, engine computer and other loads. The fuel pumps were not running but the fuel pump and eec relay seemed like they were working. If that doesn't get the FP to go, then next easy step would be to swap out the FP relay with a similar one from the fuse panel; maybe the A/C. CM 16, if I remember correctly. will faulty oil sending unit cause fuel pump to shut off. I have battery voltage at the eec relay, in and out. Ford F-150 fuse box diagram. 0 eec relay fuse keeps blowing fuel good no sp. I understand that there is a relay box under the hood with 3 relays. Is Ryan's website the Ford Fuel Injection site that subford had a link to? I looked under EEC Program Codes, but they did not have K1D1 listed. A load is any electrical component, such as a lamp, a motor, a solenoid, or a relay. Trending at $259. EEC-IV code readers are fairly inexpensive and can help. Ford F-150 owners have reported 18 problems related to ignition coils failure (under the electrical system category). New 1986-91 Ford Bronco 1986-91 Ford F150, F250, F350 Fuel Pump Relay Can Ship For $7. The most recently reported issues are listed below. Some loss in performance can also be expected. For example, a low power circuit in a car that commands the high. My '89 740 did the EXACT same thing for a while. 0 Mustang to MegaSqurt adapter harnesses lets you plug the MegaSquirt into any 1986-1993 5. It will start, run about 2 seconds, then dies. symptoms of bad ESC module or ignition control module? Discussion in ' The Injection Section ' started by ChickenRammit , Aug 5, 2010. It would die in motion, or when hot, it would also refuse to restart 'til it rested for 10 min. You also need to make sure the fuel pump relay is good. Power Hungry Performance will not be responsible for injector failure caused by failing to remove the FICM Control Relay during a reflash! 1 - Please check your vehicle's instruction manual for the proper location of the FICM Control Relay. Look for 12 volts at the fuel injector red wires. 7:1 rather than 14. Easier said than done The fuel pump relay cutting out is more than likely a result of the EEC losing power, not vise-versa. A glance through this article will enlighten you enough about them, to identify their failure if it ever occurs. For example, a failed vent control valve was fairly common in early Nissan Rogue SUVs. Symptoms of a Bad or Failing ECM-Power Relay Yourmechanic. If the fault remains after good power, ground, and connections are present, then replace EEC. There is a TFI code, but it is called an IDM (ignition diagnostic monitor) code. I quickly figured out there was no power from the EEC relay, which I have rigged a wire from to power the fuel pump relay's socket. The major sign is that it will give erroneous or non-existent codes when you scan the ECM with a code scanner. While driving 25 mph the engine shut off without warning and he was unable restart the vehicle. The fuel pumps were not running but the fuel pump and eec relay seemed like they were working. So the EEC adapts rich and sometimes gas systems can be hit and miss with A/F control often running lean. - Duration: 17:34. EEC-IV code readers are fairly inexpensive and can help. Which is which I don't know. This relay controls the spark. 3L) Ford Ranger XLT with roughly about 115k miles on it and what happens is my car will turn over but will not start unless my Check Engine Light is on. This decreases gas mileage by 1-4 miles per gallon, the built in slippage, that is. No communication. On the right hand drive cars at least,the PATS module is to the right of the central control module,it is a black box encased in a strong steel frame which is bolted to the body. My fuel pump relay is clicking like its sending morse code, very erratic like. A properly selected fuse will protect the starter under short-circuit fault conditions. In my case it was the alternator lead! Even though the alternator was charging fine, it was also draining the battery. Remove the push-on connector from the relay and, using a jumper wire, jump from the now exposed terminal on the starter relay to the main terminal (battery side or battery positive post). (it will fire on ether with no problem). picking a cummins engine There are three types of fuel systems used on the 5. Including engine computer inputs and what are needed to turn the. Wire from sender to dash gauge is shorted to ground. It looks like a thick piece of wire, and is usually stamped "fusible link". - Duration: 17:34. or the EEC relay. Example: You get a batch of bad gas that partially clogs your fuel injectors. 94-95 Mustang Wiring2. Everything was working fine ie. In the old days, changing a fuel pump on 1953-1981 Corvettes was a pain in the neck. A TIPM repair involves shipping us your TIPM where we disassemble and test it in our shop, then replace the faulty relay(s). this could cause engine stalling increasing the risk of a crash. I have twelve volts leaving the EEC when I turn on the ignition, but the Fuel relay does not switch. Look for 12 volts at the fuel injector red wires. accumulator taking a dump. I have a 1986 Ford Ranger pickup with 2. 94-95 models only: EEC or PCM power relay in the constant control relay module. If the ECM power relay fails it can cut off power to the entire vehicle. There are a lot of questions regarding the way the Mustang EEC IV works. I have a 1994 Ford Ranger and have been having problems starting it, It cranks fine but will not catch. PCM part # is R130011. Buy Clipsandfasteners Inc Repair Harness Connector EEC Relay Compatible with Ford: Replacement Parts - Amazon. I understand that there is a relay box under the hood with 3 relays. Symptoms of faulty EEC Relay???? Computer voltage from pins 37 and 57 is good, replaced dizzy with Motorcraft unit with newer TFI it had on it. Fuel pump relay is usually somewhat the same symptoms because pump stops pretty much instantly when relay cuts out. You can also find other images like fuel pump location,sensor location,fusible link location,fuse box location,ecm motor,ecm diagram,ignition module location,ecm fuse location, and others. Order Engine/Powertrain Control Module for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. This 1995 F150 primes the fuel pump for too long when cold, a sign that the EEC-IV computer is starting to fail. Unplug the Engine Oil Temperature sensor and turn the key to the run position. Look for 12 volts at the fuel injector red wires. Check out free battery charging and engine diagnostic testing while you are in store. 91 and older it's located on the trans tailshaft with a cable going through it to run the mechanical speedo. A hose or manifold might be loose or cracked, which will disrupt the fuel/air ratio in. From 15hp to 30hp, the EMM sits inside a clear plastic case. Let's Begin with the symptoms. 4 Signs of a Bad Fuel Pump Relay By Doityourself Staff If your vehicle's engine has been exhibiting start-up problems or failing to run at peak proficiency, you may be dealing with a bad fuel pump relay. 00 eBay determines this price through a machine learned model of the product's sale prices within the last 90 days. Shop for discount priced Engine Control Module. 0 Please make sure to hold your device horizontally (like a camera) rather than vertical (like a phone). SOURCE: 1991 ford ranger 3. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby by creating a spark. If this corrects the problem, check the ignition switch, neutral safety switch and the wiring in the starting circuit for open or loose connections. 8 mustang constant control relay module cc 98 1998 mustang 3. by Valerie Johnston on. When the pedal is released and on autos with the jumper cover installed, the EEC always receives a (high-resistance) ground signal on that wire through the starter relay windings. If it runs fine once started, and doesn’t die on the road, then the EEC itself is probably fine, and it is most likely a power issue. This article refers to the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector. ) No EEC or computer power - EEC or computer relay failure 86-93 models only: EEC relay next to computer - look for 12 volts at the fuel injector red wires. Social, one of the important things which "turns on" first thing with the ignition switch is the EEC Power Relay. Fuse box in passenger compartment Ford Ranger - fuse box - instrument panel. I tried testing the fuel pumps by ground out the wire on the test plug and that didn't help. The next step is the recyclers. I quickly figured out there was no power from the EEC relay, which I have rigged a wire from to power the fuel pump relay's socket. I couldn't get it to start back up. If you have existing bookmarks you will need to navigate to them and re-bookmark those pages. I have a 1994 Ford Ranger and have been having problems starting it, It cranks fine but will not catch. Generally located in the plastic housing between the engine and the air filter, the MAF sensor measures the volume and density of. Seems like the pcm conrtol relay is bad. No Start After Replacing Ford PCM PATS Key Type A&B: Stand Alone ModuleMountaineer (PATS) C: Instrument Cluster - Virtual Image Cluster (VIC) - Hybrid Electronic Cluster (HEC) - Instrument Cluster Module (ICM) October 2006 All keys are 8-cut unless otherwise noted. EEC relay will act like key is turned off when it drops out. One of the first symptoms of a problem with the ECM power relay is no power when the key is inserted. com on 09/05/02 01:00am Do all the ford 460s have a fuel pump problem?I hear a lot of folks do, is there anyone that has not had a problem, I have a 97 coach probably a 96 f 53 chassis,can i expect a fuel pump to go out. Where is the A/C WOT Relay and TSAD controller? If this is your first visit, be sure to check out the FAQ by clicking the link above. Swamp's can now provide complete testing and repair of 7. The electronic control module in a Ford cannot diagnose itself, so it gives you other signs to let you know that it is bad. Is Ryan's website the Ford Fuel Injection site that subford had a link to? I looked under EEC Program Codes, but they did not have K1D1 listed. PCM monitors TFI grounding coil to fire it. A turn signal bulb, like other broken lights or worn out bulbs, is easy to replace. Whether you need 62TE wiring diagram information, 62TE transmission rebuilders tips, 62TE technical information, 62TE diagnostics, 62TE troubleshooting help, or just answers to your 62TE transmission rebuilders question, the Transmission Rebuilders Network is the place to go!. So V=10(1) thus making the voltage drop a whopping 10V. Plastic changes can also be harmful and cause symptoms and signs of disorders such as some forms of chronic pain (central neuropathic pain) and severe. Before going further make sure to check the inertia switch in the trunk area. Easy to use parts catalog. If none of this makes your turn signal work, it's time to get a new turn signal relay. This condition is sensed by the EGO sensors and is relayed to the EEC-IV. If this is not happening all the time, chances are the contacts in the fuel pump relay are corroded from use and not making contact all the time. There is a small black relay, IIRC just behind the battery, that must be maintained through the ignition switch that feeds power to the ignition coil, engine computer and other loads. 1984-1996 C4 Corvette Fuel Sending Unit Installation. Location: Staunton, VA. ***This post will be a short write-up as FYI. jpg Diagnostic Link Connectors for EEC-IV processors ('84-95). There's a WAC (Wide Open Throttle - AC - Cutoff) relay on the passenger side fender apron and an EEC power relay behind the passenger side dash. Identifying a Bad Fuel Pump Relay If you are looking for information on signs and symptoms of a bad fuel pump relay, this article will be a helpful read. Solution: Replace antisiphon valve. Disconnect sender terminal wire at dash gauge. If your car has over 100,000 miles and still has the original oxygen sensors, it wouldn't be a bad idea to replace them as part of a good tune-up. You are getting voltage, so, the fuse is ok. my guess is the fuel pump relay is bad and doesn't bring the fuel up. The relays are : 1. i think some of you on here can tell me right off the top of your head what kind of symptoms a failing accumulator would cause? i am having a hot start problem, trying to see if i can pinpoint it. If the ECM malfunctions, the vehicle may or may not run, depending on which circuit. If the ignition system is not delivering, the problem can belong to one of two components: either the ignition coil pack isn't receiving power, or there is a bad crankshaft position sensor. Pull the bad relay out of its socket, and plug in a new one of the same type. It is the cheapest and easiest replacement item. Free Same Day Store Pickup. Just go home and rest. If it runs fine once started, and doesn’t die on the road, then the EEC itself is probably fine, and it is most likely a power issue. Test 4 Removed to distributer cap, inspected new rotor for any signs of wear or mis-installation. Whether or not later models changed,I could. i havent checked to see if the relay is sticking. Shifting problems. You have the classic symptoms of a refrigerant leak Not a bad compressor! would the leak be at the spot where it is freezing? The guy had a detector that he wavied around both the compressor and the blower unit and he said that it showed no leak; and when he hooked up pressure guages he said the pressure was steady so there was no leak. The Connecticut State Department of Education has a new website. Refer to Thermostat Replacement in the Engine Service Manual. Remove thermostat housing. the fuel injectors. 0's I have replaced everything that I know of except for the EEC relay. It can go weeks fine then all of a sudden it will not start. You can also check the fuses to make sure the elctrical system is correctly set up. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby by creating a spark. ) No EEC or computer power - EEC or computer relay failure 86-93 models only: EEC relay next to computer - look for 12 volts at the fuel injector red wires. Also please check out the statistics and reliability analysis of Ford F-150 based on all problems reported for the F-1. It is located inside the distributor. Symptoms: Boat would start and idle fine. or bad fuel pump or shorted wire. 9 Cummins engines, and these differences are the only major aspects that set them apart from each other. If it runs fine once started, and doesn’t die on the road, then the EEC itself is probably fine, and it is most likely a power issue. i'm not sure if the low fuel warning module is even in the circuit but it is located on the instrument panel center support. Vacuum Leak. the closest one to the front of the car. I have spark and compression and have set timing. Or do it yourself with the procedure posted. The IPC validates the code, and if it is correct, sends a message to. 1984-1996 C4 Corvette Fuel Sending Unit Installation. Symptoms: 1) ign on, power to everything for 2 secs, and then power off ( good so far) 2) attempt to start, power disappears. This powers up the computer, which turnms on the fuel pump for about 2 seconds, initially, and related other stuff. 8 with EEC-V > The fuel pump power relay went bad resulting in the pump turning itself > on every 15 or 20 seconds even with the key off and out of the ignition > until the battery ran down over night. I have check all grounds that I can find. If you see loose battery terminals, corrosion or bad cables, replace them. The number on my eec is e6tf 12a650 k1a but I haven't been able to find one. probably the eec relay or the circuit that controls it, check in the fuse panel for any blown fuses and replace them, then if you find the eec relay and you can find another one identical for the abs, A/c etc then switch them out and see if the car will start, I'd recommend getting a wiring diagram and or manual to start, problem is likely wiring, not the ecm. In heating and cooling these relay/contactors are used to turn on high voltage components such as motors, compressors, and other high voltage components. Total cost of doing the pump and relay myself will be circa £250 using Bosch parts from GSF and a new relay from Mercedes. It is unavoidable due to fluid being the main component of the coupling action. We've seen a number of common reasons for heavy duty diesel ECM failure including: corrosion, fuel solenoid shorts, injection wiring harness corrosion, grounding issues, replacement starters, dead battery cells, jumpstarts, and welding and lightning strikes. Bad or broken wires can also cause misfires. Only AMG versions have an extra controller for the fuel pump. 91 and older it's located on the trans tailshaft with a cable going through it to run the mechanical speedo. Float in sender is defective. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby by creating a spark. Unplug the Engine Oil Temperature sensor and turn the key to the run position. EEC power relay? Where is it? I am having the engine shutdown trouble that seems pretty common with the EEC 5. I am a service manager of a small copier company in Chatsworth, CA. How to Test a Four Terminal Relay. A bad relay may cause the vehicle to crank, This article originally appeared on YourMechanic. The ECM power relay is the relay responsible for sending power to the ECM. SOURCE: 1991 ford ranger 3. Problem: Rattling noises from engine at startup. Our highest goal is to go above and beyond for each customer by providing the fastest turnaround time in the industry with exceptional customer service. Symptoms: Boat would start and idle fine. Plastic changes can also be harmful and cause symptoms and signs of disorders such as some forms of chronic pain (central neuropathic pain) and severe. Any ideas on what I can do now, I am afraid to go far as I might get stuck. The PCM used on these vehicles is referred to by Ford as the Electronic Engine Control-IV (EEC-IV) module. The list of symptoms and possible causes below should help you get a better idea of what's causing your engine to act up. Locate fuse and relay. Look for 12 volts at the fuel injector red wires. Fuse box diagram. Vehicle started up immediately after placing in "park" position.