need help!
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
This is the computer:
And its location:
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Freshman User
Joined: Jul 2007
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[COLOR=black][FONT=Verdana]Now I really still feel like an idiot because I put the computer in that I got off my buddy and it still had the check engine lights on but I tried anyways. It fired up but I found out later my buddy had sprayed gas down the throttle body so I still have no fuel pump so it’s starting to make me mad. I crawled under it and traced the wires back from the fuel pump but I can’t find them any where under the hood. My dad said he was talking to my uncle and he said that there is something in front of the computer that would have blown before the compute would have blown but I don’t know what it was.
so any more help would be great
so any more help would be great
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Your Uncle is talking about the EEC/PCM Power Diode but the trucks did not have one until about 1992.
First with someone at the EEC Power Relay turn on the key and see if clicks.
Also see if the Fuel Pump relay clicks at the same time and drops back out one second later.
If EEC Power Relay clicks you need to ground pin #6 of the EEC Self-Test connector then turn on the key and see if the fuel pumps relay clicks when the key is turned on and if so do the fuel pumps run?
Let us know what you find out so we know what to tell you next.
The high pressure fuel pump wires from the rear go to the Inertia switch in this diagram.
Push down the button on top to reset it.
/
First with someone at the EEC Power Relay turn on the key and see if clicks.
Also see if the Fuel Pump relay clicks at the same time and drops back out one second later.
If EEC Power Relay clicks you need to ground pin #6 of the EEC Self-Test connector then turn on the key and see if the fuel pumps relay clicks when the key is turned on and if so do the fuel pumps run?
Let us know what you find out so we know what to tell you next.
The high pressure fuel pump wires from the rear go to the Inertia switch in this diagram.
Push down the button on top to reset it.
/
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