Ottawa Fiero Club Forum

I would like to know if anyone has a wiring diagram???  I've owned my car for 7 years now but if I don't figure this problem out soon I'm about loose it. 

I have no fuel.  Pressure is good, fuel pump was just changed and injector is good.  PLEASE HELP :'(

Joe

check fuel pump relay, fuel pump fuse and oil pressure switch.

and make sure the contacts in the connector are clean.

Thanks for the reply Aaron but I forgot to mention that I changed the fuel pmp relay when I changed the fuel pump as it was done.

You may have mentioned it before but what year and engine is your car. I know on 84's there is an extra wire that comes off the alternator to feed the ECM for running the fuel pump and injector. Dan

It's an 85 4 cylinder 2.5

Would what you said apply to 85's?

No.  The 84 Duke's wiring is unique to that model year.

A few easy tests to verify things...

• Key off, apply +12v to the tan wire in the ALDL connector.  If your new fuel pump (and the wiring) is good, the fuel pump should run.  If it doesn't run, either the new pump is junk or you have a wiring problem.
• Key on, unplug the connector from the oil pressure switch and jump the orange/black & tan/white wires.  Fuel pump should run.  If not, either the fuel pump fuse is blown, or there's a break in the circuit downstream of the fuse.
• Turn the key to START, and hold it until you see some action on the oil pressure gauge.  If the fuel pump hasn't kicked in by this time the fail-over switch inside the oil pressure sensor is bad.
• Unplug connector the blue connector from the ECM.  Key on, apply +12 to pin 18 (dark green/white wire).  The f/p relay should click on, and the fuel pump should run.  If the relay clicks but the pump doesn't run, either the relay has bad contacts or you have a wiring problem between the relay and the pump.  If nothing happens, the relay either has a bad ground, there's a break in the green/white wire between the ECM and the relay, or the relay's coil is bad.

If (using the above) you've verified that the pump, relay, and associated circuitry is good, yet the fuel pump will not spring to life for a few seconds when you turn the key to RUN, the fuel pump driver circuit in the ECM is bad.

If the fuel pump will prime when the key is left in RUN, but fails to run when cranking, the ECM isn't seeing refererence pulses from the distributor.  Bad pickup coil, distributor magnet, or ignition module.

holly step by step

Thanks guys for the help once again.  I really appreciate it.  I got it going this afternoon.  One bad corroded wire. F---  All that time and that's all it was.

Thanks again...

Joe

  Glad to hear you got it going Joe, Kevin  O0

Never give a pseudo-civil servant a hobby, an internet connection, and an incredibly slow day at work.  Strange things happen.   ;D


Good to hear you have it running again Joe!

Thats nothing, try never give Gary a grinder a place to plug it in and a car to work on. Dan

ha ha Don! all that typing and I had it.  :P