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Re: try a crank sensor & have you checked FP ?
Posted by Milos (more from Milos) on Tue, 8 Aug 2006 11:25:28
In Reply to: try a crank sensor & have you checked FP ?, jak
[Profile/Gallery]
, Mon, 7 Aug 2006 22:30:24
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Thanks for keeping up with this thread.
I have changed the crank sensor twice so I doubt it is the sensor but perhaps the wiring to the ECU. I am not sure how to check the wiring.
I do have a new fuel pressure regulator on order, perhaps that will clear it up. When I did change the plugs they were pretty black. The one from cylinder 4 was quite black everywhere, and I could smell fuel on it more than the rest. Perhaps my injectors are not spraying a consistent mist. I already checked the new plugs and the rings are quite black on all of them, cylinder four has a thicker coating of carbon then the rest.
Also, I think the engine temp sensor is involved in setting the fuel mixture. If it is giving wrong reading then I might be getting a rich mixture (my theory at this point). Because under full throttle the boost gage backs off quickly and then comes back quickly, I think that the computer is sometimes detecting knock under full pressure. It is not the harsh jerking that you get if there is fuel cut off, just smooth easing off and back all the way to end of red on the stock gage.
At this point I don't suspect the new rear O2 sensor. If it was faulty I would expect it to cause misfire more regularly then only on a hot day.
Clearly I don't drive the car, except to test it after I made a change.
Hopefully this weekend I will have some good results from the new parts.
Thanks Jak.
posted by 209.82.11...
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