Here is the skinny... My sons fuel pump in his 87 TC went out, so I had a friend replace it with a walbro 255. Drove the car all the way home about 25 miles with no issues. My son went to start it three days later and the fuel pump wont run. Thanks to Pete at NATO I have diegrams and ran every test I could and nothing! Nada! Zilch!
Here is what I have done so far...
With key in ON position I checked....
-TPS has power
-Both yellow wires and tan/green wire to IRCM have power
-All wires on ignition switch have power
-IRCM replaced with known good unit, no change
.-When I jump the test connector you can hear the IRCM click and pump runs.
The fuel pump has power when I jump the EEC test connector, but no power otherwise
-replaced ignition switch with new one(only cost $10) no change
- replaced inertia switch with known good one, no change.
I even jump the inertia switch wires and pump did not run.
-Fuel pump has 4 wires:
With key in on position the orange wire going to pump has power, however my tester was flashing on and off.
No power to pink wire unless I jump the test connector
Its an 87 TC with no dash “check engine” light.
Again, last thing done to the car was replace fuel pump. We drove the car all the way home and parked it for three days. Now pump will not kick on at all.
I'm gonna lose it! Help!!
Did you check the fuel pump relay in the trunk? Come to think of it, do TC's even have the fuel pump relay in the trunk? It's near the right shock tower, and has a green connector, at least on 5.0 cars...
Yeah the switch that shuts off in case of a wreck, just hit the reset button see if that helps, its in the trunk, of course thats for a 5.0....
It's in that location in all three engine models ;)
Ignition switch?
I'm not talking about the inertia switch, I'm talking about the fuel pump relay. On 5.0 cars it's located near the right rear shock tower on the back seat support and has a green connector. I had to replace mine two weeks ago. I just cut the connector off and installed a universal-type relay because I didn't want to have to buy a Ford relay...
The EEC provides the ground to pick the Fuel pump relay. (Located in the IRCM in your car, not in the trunk as suggested).
When you "jump the test connector", you are providing the ground for the fuel pump relay.
Try pulling KOEO codes to see if the EEC is alive.
Does the TFI control the priming of the fuel pump.