no fuel pumps
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Elder User
Joined: Dec 2005
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no fuel pumps
I have a 1990 F350 with a 460 fuel injection.
I Just washed ALL the mud out from my engine bay last night and I let it run for about 30 minutes to dry out.
well today I go out and the fuel pumps are not turing on. The relay is clicking. I need some quick pointers! thanks!
also I just dried out the distributor cause some water got in there.
I Just washed ALL the mud out from my engine bay last night and I let it run for about 30 minutes to dry out.
well today I go out and the fuel pumps are not turing on. The relay is clicking. I need some quick pointers! thanks!
also I just dried out the distributor cause some water got in there.
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
But if it still could be the computer if the injectors are not firing and you have spark.
If you do not have spark unplug the computer and see if spark returns, if it does return then the computer is bad.
By grounding pin #6 of the EEC self-Test connector and turning on the key. The fuel pump should run all the time the key is on with pin #6 grounded.
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Elder User
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Everything works. I could not get power from the green/yellow wire to the pump switch. So I Bypassed it with a 12 volt source for now . . But runs good lol.
What would cause the Green/yellow wire to lose power? I Know it does run to the computer. But is it afuseable link?
What would cause the Green/yellow wire to lose power? I Know it does run to the computer. But is it afuseable link?
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
I think you mean a Tan wire with a light green stripe on it.
This is the wire the computer grounds to pick (make) the fuel pump relay. The computer grounds this wire for one second each time it sees a PIP pulse from the distributor and for one second when the key is first turned on. With the engine cranking or running the PIP pulses come faster than one each second so the fuel pump will run all the time the engine is cranking or running.
The only time there is voltage on this wire is when the fuel pumps are not running and no there are no fuse links on this wire.
This is the wire the computer grounds to pick (make) the fuel pump relay. The computer grounds this wire for one second each time it sees a PIP pulse from the distributor and for one second when the key is first turned on. With the engine cranking or running the PIP pulses come faster than one each second so the fuel pump will run all the time the engine is cranking or running.
The only time there is voltage on this wire is when the fuel pumps are not running and no there are no fuse links on this wire.
