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Topic: No start, no fuel pump prime... (Read 284 times) previous topic - next topic

No start, no fuel pump prime...

Hey all! It's been a while since I've been on the forum and Its been a while since I've had my bird on the street, but am in the process of getting her back up and running.

Car (88 Sport Bird with 5.0 HO, MAF) has been sitting for years, but running and drivable. Would do regular trips around the neighborhood but noticed the ignition switch starting to act up, if I held it in place the car run but let go it would shut-off immediately. Okay, need a new ignition switch.

At the same time, I decided to install the 3g alternator I've had in a cabinet for the last 10 years. Finished the 3g install, started the car and ran though the ignition switch persisted...ok time to replace the ignition switch. Replaced the switch and now will not run. I don't hear the pump priming before the starter engages.

1. I've pulled and checked the fuel pump relay. It is functioning with a 12v source and multimeter indicating a closed circuit.

2. I've checked the inertia switch.

3. With the relay plugged-in, and the ignition on, I can trigger the pump through the test connector in the engine bay.

4. From the driver seat, I can hear a relay click in the passenger side of the dash board when twisting the key to the start position...not sure what that relay is triggering.

Ideas? How can I jumper the pump to cycle from the test connector but twisting the key won't initiate it?
Can the ignition switch fail to trigger the fuel relay? Fuse?

To be clear, it ran with the 3g installed and the old failing ignition switch. But not after I replaced the ignition switch.

Oh boy I love this car!

Thanks for looking

Bryan

 

Re: No start, no fuel pump prime...

Reply #1
The pump running with the test connector jumpered to ground tells us:
1. The eec power relay is working. (the relay you hear clicking)
2. The inertia switch is not tripped.
3.The fuel pump relay is working.
4. The fuel pump is working.
 What aint working is the EEC providing the ground for the fuel pump relay.
Try starting with the test connector running the pump.
Pull codes.

Re: No start, no fuel pump prime...

Reply #2
The pump running with the test connector jumpered to ground tells us:
1. The eec power relay is working. (the relay you hear clicking)
2. The inertia switch is not tripped.
3.The fuel pump relay is working.
4. The fuel pump is working.
 What aint working is the EEC providing the ground for the fuel pump relay.
Try starting with the test connector running the pump.
Pull codes.

I appreciate you're translation as I didn't know where to go from there. I'm traveling this week, but I'll start with testing that next weekend and update if I can find any new clues. Thanks!