If you trust the mechanic allow him the time to try to get it to fail. Intermittent problems can be real difficult to find. The fix will be relatively easy. Locating the problem is the issue. It could be as simple as a corroded or loose connector, but until it fails there is no way to find it. Taking it to another shop will not help. They will only go over the same ground, at your expense.
Fuel pump inertia/kill switch location??????
- Thread starter demarpaint
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I do not think just starting the car each day will cause it to fail. I think you may need to drive the car a bit and bounce things around.
Have you found and checked the ground connector for the fuel pump? Take it off, clean it up, grease it and tighten it down.
I have a theory that one could measure the resistance of the fuel pump and compare it to a new pump and maybe determine if the pump was on its way out. When my pump failed last time I measured the old and new pumps. The resistance was different by maybe 15 ohms, but it was not like the broken pump had a resistance of 0 or infinity like one might guess.
Have you found and checked the ground connector for the fuel pump? Take it off, clean it up, grease it and tighten it down.
I have a theory that one could measure the resistance of the fuel pump and compare it to a new pump and maybe determine if the pump was on its way out. When my pump failed last time I measured the old and new pumps. The resistance was different by maybe 15 ohms, but it was not like the broken pump had a resistance of 0 or infinity like one might guess.
There is a fuel pump test that looks at the current draw of the pump using an oscilloscope to see the waveform of the current -- which changes as each segment of the armature turns past a brush. By noting differences in each current spike one can determine impending failure. I suspect it takes some skill in analyzing these wave forms to get good at this test. Not to mention that the equipment to perform the test costs several thousand dollars. That equipment does have other uses in diagnosing and troubleshooting automotive issues, but it is beyond the means of most armature enthusiasts.
I haven't seen any mention of replacing or jumping (short across connector) the oil pressure switch. This needs to be ruled out at least since it's so simple.
good luck
good luck
I touched base with the mechanic today to tell him I am in no hurry to have the car back. He claims he can't find anything wrong and would like me to take the car back. I asked that he keeps it until the beginning of the week, and just starts the car a few times a day, lets it idle, shut if off, restart, what ever. It will fail again for sure, if it doesn't I will take it home and fix it myself, a lot of good ideas here for me to try.
He claims he has checked all wires etc the last time it was in for the same problem. My beef is I had it towed twice, the first time in he replaced the fuel pump, $375 later and 2 tows I have the same problem......Thanks for all the suggestions.
I am a pretty good DYI'er, and have a feeling I will be fixing this myself, I was trying to avoid because my plate is full with other projects.
Frank D
He claims he has checked all wires etc the last time it was in for the same problem. My beef is I had it towed twice, the first time in he replaced the fuel pump, $375 later and 2 tows I have the same problem......Thanks for all the suggestions.
I am a pretty good DYI'er, and have a feeling I will be fixing this myself, I was trying to avoid because my plate is full with other projects.
Frank D
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