Wiring Question for 1985 F150 5.0 MFPI
#1
#2
#3
Here's the original thread.
https://www.ford-trucks.com/forums/1...ont-prime.html
Here's the picture. Is this the resistor you are talking about?
http://img809.imageshack.us/img809/943/50ignition.jpg
https://www.ford-trucks.com/forums/1...ont-prime.html
Here's the picture. Is this the resistor you are talking about?
http://img809.imageshack.us/img809/943/50ignition.jpg
#5
Do you have any suggestions as to what to look for on ECU problem?
Replaced ECU, truck started, idled, and drove fine for about 3 days. Did both static & dynamic code checks. Nothing, other than code 10 & 11. Then started becoming difficult to start. Ran rich during start-up but smoothed out after 30 seconds or so.
Starting to go back like it was when I first started working on it. Getting codes for 2 or more sensors (static only)
Recently pulled wiring harness to perform thorough check of all wires for shorts. The OBD system should pick up wiring problems but I'm going to check anyway. thought I had a bad diode, but it checks ok.
Any other ideas on what could knock a ECU out in a short time? Rich condition most likely caused by ECU holing injectors open.
Replaced ECU, truck started, idled, and drove fine for about 3 days. Did both static & dynamic code checks. Nothing, other than code 10 & 11. Then started becoming difficult to start. Ran rich during start-up but smoothed out after 30 seconds or so.
Starting to go back like it was when I first started working on it. Getting codes for 2 or more sensors (static only)
Recently pulled wiring harness to perform thorough check of all wires for shorts. The OBD system should pick up wiring problems but I'm going to check anyway. thought I had a bad diode, but it checks ok.
Any other ideas on what could knock a ECU out in a short time? Rich condition most likely caused by ECU holing injectors open.
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