Question about 1988 Ford F 150

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88 F150 Ignition is off and keys in my pocket but fuel pumps running non stop and eec relay powered just like ignition is on? brand new relays and connectors

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You probably have a worn out key and tumbler assembly. Crabk your truck and see if you can remove the key while it is running. Try putting the key back in and jiggle it to see if the powered up units go off. I worked for Ford for many years and that year truck also had a problem with the ignition switch at the bootom of the steering column. That is where the rod from your ignition switch (key) goes in and turns all the accesories on. It is possible that it is sticking in the power on position. This could also be from a broke actuator rod.

Posted on Feb 07, 2010

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My 93 taurus turns over but no start the CCRM buzzes when the key is on and I have constant power to the coil wire when not cranking changed CCRM no help used too if I hit CCRM it would stop buzzing


Ignition control module or PCM problem or pick up coil ! The CCRM - constant control relay module just has control relays for the fuel pump , cooling fans , A/C clutch coil control , PCM power . Nothing that would make the coil fire continuosly . I would check out videos on youtube test ford ignition system's ScannerDanner gets his but kicked by an 88 150 EEC IV Ignition

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Find another relay with an identical part number(maybe the fuel pump relay)& swap it in place of the suspect EEC relay.See if the buzzing quits.If it does,the EEC relay is bad.There might be a ac WOT cutout relay or fan relay with an identical part number that you can use instead of the fuel pump relay.The fuel pump relay & EEC relay will both have to be in place in order for the engine to start.A relay should click when you turn the key on,but it shouldn't make a buzzing noise.BTW-the EEC relay is energized when you turn the key on and then it supplies ignition on power to the computer,injectors,solenoids and fuel pump relay.Therefore, if the EEC relay is defective, these components are Not going to work.If you don't hear the fuel pump prime when the key is first turned on,that's a sign the EEC relay is bad.One of the injector wires should have battery voltage, if the EEC relay is powering up.If your vehicle doesn't have a matching relay to the EEC relay(except for the fuel pump relay)just pull the FP relay out and slide it into place of the suspect EEC relay for testing purposes.If the buzzing noise stops,then replace the relay because there's no way to test if the car will start without having both relays in place.

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Replaced distributor still no spark from coil


If there is no voltage at the ignition coil then you need to check and see if you have voltage at the EEC power relay which supplies voltage to the ignition coil and the fuel pump relay. The ignition switch applies voltage to the EEC power relay. The EEC power relay and Fuel pump relays are found together usually on the drivers side fender apron, about half way between the headlight and the firewall

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1 Answer

1988Ford F150 Econoline Van5.0fuel system problems


Not sure I am following your story, but here goes.
The fuel pump relay gets power from a fuseable link at the starter solenoid and from the EEC relay. When the fuel pump is grounded by the computer it sends power to the inertia switch then to the pumps and controls.
If you are not getting main power to the relay the fuseable link (yellow wire) is fried. If the pump relay is not engaging, the EEC relay could be toast (red wire). If you are getting power out of the relay but not to the pumps, the inertia switch may be tripped.

Jan 15, 2013 | Cars & Trucks

1 Answer

No fire , spark or fuel


Is it a 4 cyl or V6 - and you are talking about the EEC relay right ?

Both the fuel pump relay and EEC relay are grounded by the computer. The fuel pump relay magnet is powered by the same red wire the injectors are powered by coming from the EEC relay.
The actual power circuits for each relay comes from different fuseable links.
You would need to find out if the relays are being grounded by the computer with the key on, and if they are sending power out.
You might also want to check to see if you get a check engine light when you turn the key on to see if the computer is powered up.

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1 Answer

Engin starts fine runs afew seconds then pops & sputters & stalls try again same result


Could be an ignition or fuel problem.
Someone would need to check the EEC relay, the fuel pump relay, the ignition module and the coil to see if they are failing.
You need to know if you are loosing fuel or spark when it happens.

Sep 30, 2012 | 1991 Ford F150

1 Answer

Where is my eec computer located on my 1991 f150 300 straight 6 my fuel pump wont shut off with keys in my pocket. i already replace the ignition switch and fuel pump rely. any suggetions on what it could...


It is in the front seating area, driver side, behind dash, upper corner, mounted on dash with support brackets. I don't think the computer would fix your problem. Does the fuel pump quit running when you remove the relay? It sounds more like a wiring problem, like a wire that should be getting ignition battery, (going to the fuel pump), is getting constant battery. I would check the wiring for the fuel pump relay.

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1 Answer

87 F150 wont start. New fuel pump, rail, injectors, cap & rotor, EEC & Fuel relays. If I pour gas in the throttle body it starts and runs great until that fuel is gone. Fuel is getting to the...


try changing the igniton module on the distribuitor in most cases it's the problem if you dont want to buy it you can take the ignition module to a autozone and they will check it for free

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1 Answer

1989 Thunderbird won't start.


Ignition switch is more likely. If it's consistently making contact in the same position every time, the relay sounds like its working. As far as the EEC, I honestly don't know for sure but it doesn't sound like it. All the best!
Greg

Jun 14, 2009 | 1989 Ford Thunderbird

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