That's a bunch of good info!
No Start, No Fuel
Thread Starter
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Freshman User
Joined: Sep 2002
Posts: 44
Likes: 0
From: Norfolk USA
No Start, No Fuel
I just wanted check onboard with the gurus just to make sure all my bases are checked. I have a '92 F150 4 X 4, all stock. The other day I pulled into the gas station to put gas in my rear tank. I always cycle my tanks, but can never afford and have little reason to fill both. Any way, I hopped back in and the truck just cranked over without starting. Just to be sure I cycled to my front tank, and still no start. I checked the rail and no fuel was present on the valve and I cannot hear either pump. Next I checked the relay. I didn't have a meter handy, so I swapped with another relay and still did not start. To confirm fuel pump operation, I went ahead and grounded out the pin and listened for the pump. The pump worked and put fuel back up to the rail. I have even checked the inertia switch and all seems fine. Amy I correct to assume the EEC is bad? I mean, is ther anything else that I may have overlooked? Anyways, thanks for reading and all help is appreciated.
Senior User
Joined: Jan 2004
Posts: 419
Likes: 0
From: Macomb, IL
Check all the wires going to the relay socket. I have seen these go bad several times. The relay for the EEC may be bad or the wires for it as well.
I've seen the wires separate due to corrosion right at the crimped on connector. Just give them a light tug. If one is bad it will come out in your hand.
I've seen the wires separate due to corrosion right at the crimped on connector. Just give them a light tug. If one is bad it will come out in your hand.
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
If you grounded pin #6 of the EEC Self-Test plug with the key on and the pumps ran as I think that is what you said. Then the EEC (PCM) power relay and the Fuel pump relay and their wiring are OK.
Make sure you have power to pin #'s 1, 37 & 57 on the computer with the key on and pin #'s 40 & 60 have a good ground.
Also check to make sure Computer pin # 22 has continuity to pin #6 of the EEC Self-Test plug.
Check to make sure all pins look OK and not pushed out in the computer plug.
If all checks OK and the pimps still do not come on for the one second time out when you turn on the key them yes you may have a bad computer.
Make sure you have power to pin #'s 1, 37 & 57 on the computer with the key on and pin #'s 40 & 60 have a good ground.
Also check to make sure Computer pin # 22 has continuity to pin #6 of the EEC Self-Test plug.
Check to make sure all pins look OK and not pushed out in the computer plug.
If all checks OK and the pimps still do not come on for the one second time out when you turn on the key them yes you may have a bad computer.
Thread Starter
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Freshman User
Joined: Sep 2002
Posts: 44
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From: Norfolk USA
Yeah, I was sure to check ALL of the wiring. I noticed some moisture on the computer connector and pins 57 - 60 were corroded, there were others, but those were the worst. I just don't think there is anywhere else to look and just wanted to check.
Thread Starter
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Freshman User
Joined: Sep 2002
Posts: 44
Likes: 0
From: Norfolk USA
Good Morning All, I had to do a little searching to find my post. I dug up some of my previous posts and learned an interesting thing. I, like most, tend to approach the board to gain knowledge on a problem that I am experiencing. In short I never really posted my overall results and contribute to what makes this forum so great. My deapest apologies. Today, I decided to brake that trend. On Wednesday my reman computer was delivered. (Yay $100) I cleaned the connector and sprayed some electrical grade water displacing compound and reseated the connector. My truck has never ran better. It even shifts better. If I had any idea that my computer had contributed to so many deficiencies, as to the performance of my truck, I would have replaced it a long tim ago. I just accepted the fact that she was getting old. It is like she just receive an injection of youth. Thanks, to all that have helped, you posts really make this forum work.
Good day,
NavFlyer
Good day,
NavFlyer
Senior User
Joined: Jan 2004
Posts: 419
Likes: 0
From: Macomb, IL
Good job, Good post and thanks for the update.
I wonder how many problems can be resolved by cleaning, or repairing wires. I'll bet a bunch. I'll bet even more parts get sold because of it.
Again, Good job!
I wonder how many problems can be resolved by cleaning, or repairing wires. I'll bet a bunch. I'll bet even more parts get sold because of it.
Again, Good job!
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Freshman User
Joined: Sep 2002
Posts: 44
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From: Norfolk USA
You are 100% right. A little bit of water intrusion had taken place, but I could have saved my computer if I would have performed regular cleanings beneath the connector. We rely too much on the "not broke, don't fix it", but when you think about it, a little preventative maintenance could go a very long way.
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