Replace ECM or simply short wire?
Thread Starter
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Tuned
Joined: Jan 2009
Posts: 457
Likes: 7
From: Decatur, AL
Replace ECM or simply short wire?
Some of yall have been helping out with my truck...
88 F150 XLT 4X4 5.8 Auto.
Original problem is that it runs so rich, @ low fuel pressure, that it can fill the crankcase with fuel in a few minutes.
Can not get my fuel pump to stay on. Replaced relay and troubleshot everything.
Seems that the only way to get the fuel pump on and power/pressure up is to short the tan/green wire that goes to the relay and also goes to the test connector.
Can i just short that wire, or do i need to replace the ECM. It comes from port 22 on the ECM.
88 F150 XLT 4X4 5.8 Auto.
Original problem is that it runs so rich, @ low fuel pressure, that it can fill the crankcase with fuel in a few minutes.
Can not get my fuel pump to stay on. Replaced relay and troubleshot everything.
Seems that the only way to get the fuel pump on and power/pressure up is to short the tan/green wire that goes to the relay and also goes to the test connector.
Can i just short that wire, or do i need to replace the ECM. It comes from port 22 on the ECM.
Thread Starter
|
Tuned
Joined: Jan 2009
Posts: 457
Likes: 7
From: Decatur, AL
Essentially working thru almost everything regarding the fuel rail. I just bought the truck for a song.
My major find so far: low fuel pressure and now loss of power to the pump. The ECM on the truck is a reman. It looks brand new. The fuel pump is OE, but can hold 40+ pressure when i short the tan/green wire to relay.
The ECM was not mounted correctly and was likely giving me an intermittent ground problem. The injectors were likely firing improperly too.
Today, after work, i will short the wire and see how she runs.
My major find so far: low fuel pressure and now loss of power to the pump. The ECM on the truck is a reman. It looks brand new. The fuel pump is OE, but can hold 40+ pressure when i short the tan/green wire to relay.
The ECM was not mounted correctly and was likely giving me an intermittent ground problem. The injectors were likely firing improperly too.
Today, after work, i will short the wire and see how she runs.
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