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"Undiagnosable" misfire problem
Posted by Geza in CA (more from Geza in CA) on Tue, 29 Oct 2002 14:02:56
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My '93 9000CS is suffering from an occasional misfire problem that has confounded the mechanics out here (it doesn't "throw a code," and only misfires occasionally, making it nigh-on impossible to diagnose.)
Any help in thinking this through would be greatly, I mean GREATLY, appreciated.
Symptoms: runs on three cylinders on some (maybe one in 15) warm starts, sometimes when driving. Also the car backfires on deceleration in spite of a new rear muffler. No relation to climate or any other external condition. Car has 158K miles, done this since I bought it @ 134K.
What I've done: replaced DI cassette w/blue one, plugs, dielectric grease (from tips on this board), replaced ECU, had injectors removed and cleaned, tried changing to higher octane. Nada.
I know there's a ton of stuff that could cause this, but I don't want to just start replacing things because of the cost involved. One mechanic said injectors might be the problem, but it's a gamble at $1K to replace!
Sorry this is so long and thanks again for any advice you can give me.
Anybody want a blue DI cassette?
posted by 63.202.18...
Posts in this Thread:
- "Undiagnosable" misfire problem, Geza in CA, Tue, 29 Oct 2002 14:02:56 <-- Viewing This Message
- I'll take that blue DI cassette off your hands..., Street, Thu, 31 Oct 2002 11:28:13
- Re: "Undiagnosable" misfire problem, Anglo Holland, Wed, 30 Oct 2002 20:48:55
- I had similar sysmptoms on 93 non-T 9K..., JJB, Wed, 30 Oct 2002 19:58:48
- Why are you sure there is only one problem?, Kappy, Wed, 30 Oct 2002 17:02:48
- Since this thread still has life...another guess/idea, SteveB, Wed, 30 Oct 2002 14:17:38
- Re: "Undiagnosable" misfire problem, Annie, Wed, 30 Oct 2002 08:46:39
- Idea..., Eric Law, Tue, 29 Oct 2002 18:14:01
- First thing to do is..., Street, Tue, 29 Oct 2002 15:31:37
- Check Compression..., SteveB, Tue, 29 Oct 2002 14:50:03
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