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Cousins:
This week in further efforts to get Dad's car to run right, I replaced the wiring harness. I sourced a $99 harness off eBay with the correct part number for the application. That install was pretty straight forward,. and a lot easier with the throttle body off. I did not remove the intake.
While in there I:
1 - cleaned throttle body
2 - replaced FI temp sensor (Preventive while I was in there). Got it from FCP.
3 - Oil box / flame trap cleaned
4 - Cleanned AMM. Also tried with known good spare AMM's, same symptoms.
5 - All new cap, rotor, plugs, plug wires, oil change, and new fuel pressure regulator (old one stunk of gas in vac hose)
I did the harness, temp sensor, and throttle body after driving the car to my garage in the next town over, so I know the replacement of the tune up stuff and regulator isn't effecting this hot-start problem.
After doing the harness, temp sensor, and throttle body, the car starts and runs great with plenty of power. It's really improved! However, once the car gets to opperating temperature, it will not restart. It just cranks and cranks. There is spark at the coil during this. I did not check the leads off the distributor cap. Fuel pumps are running during cranking, as I can hear them and I swapped in a known good white relay.
I did not have a hot start problem before this. I did have rough idle, etc classic running problems associated with a destroyed FI wiring harness, and when the car is running, those symptoms are gone.
I am thinking I got sold a bum FI temp sensor. I don't think I have the leads switched on the temp sensor and anything else (my idle motor is 3-wire and the temp sensor is 2 wire). While running, the quality is great and it will not stall when hot, it just won't restart.
Interestingly, if I remove the 25 amp blade fuse while hot, and try to crank it, it will start for a brief second and then stall out again.
I have checked for vacuum leaks and found none.
Before I swap in the old FI temp sensor I'd like the lists opinion. Thanks in advance!
Jim
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