Re: Frustrated with 88SPG---Long - Saab 900 Bulletin Board - Saabnet.com
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Re: Frustrated with 88SPG---Long
Posted by gorper (more from gorper) on Tue, 3 Jun 2003 10:13:18
In Reply to: Frustrated with 88SPG---Long, bgant, Tue, 3 Jun 2003 10:01:37
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Cold idle hunting indicates bad air mass meter. Before the O2 sensor warms up, the Jetronic ECU ignores its signal and instead takes air measurements from the AMM. Because your AMM's signal is bad, you get the fluctuation until the O2 sensor is warmed up, at which point the ECU is getting good data and can provide an even idle.
To test the AMM, swap it out with a known-good unit with the *same last three digits* in the part number.
As for the missing, it could be the Hall sensor connector on the distributor. It's fragile and breaks down. You could have a helper give the car some gas while you wiggle it around a bit to see if you get the miss. Also, I recently found a lot of corrosion on my coil terminals; did you check them?
posted by 63.224.57...
Posts in this Thread:
- Frustrated with 88SPG---Long, bgant, Tue, 3 Jun 2003 10:01:37
- Also check fuel pressure, GregR, Tue, 3 Jun 2003 14:27:41
- Re: Frustrated with 88SPG---Long, lms, Tue, 3 Jun 2003 11:27:03
- Re: Frustrated with 88SPG---Long, gorper, Tue, 3 Jun 2003 10:13:18 <-- Viewing This Message
- Re: Frustrated with 88SPG---Long, SDP, Tue, 3 Jun 2003 10:12:15
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