92 Turbo cuts out intermittently - Saab 900 Bulletin Board - Saabnet.com
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92 Turbo cuts out intermittently
Posted by Ken H [Email] (more from Ken H) on Tue, 22 Aug 2006 09:50:05
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99% of the time, this car runs fine and doesn't generate trouble codes. However, every few days the engine cuts out, either while cruising or accelerating. Sometimes it will go back to normal after cutting out, other times it loses power and runs rough especially if I'm in traffic. Then the CEL comes on - codes are 12224: rich mixture and 12112: incorrect mixture at idle.
All the vacuum lines appear fine. I thought the fuel pump might be acting up so I swapped in a spare with no improvement. I also temporarily blocked off my ELCD system also with no luck. The fuel filter only has a few thousand miles. FPR? - seems unlikely to me that it would fail intermittently like this but I haven't checked fuel pressure (no gauge).
Now I'm wondering if my ignition might be crapping out periodically. My plugs, cap and rotor are pretty new, and the wires look fine. So, what could cause symptoms like these? Coil? Hall effect module? I'm reluctant to just start throwing expensive parts at the problem, but diagnosing an intermittent problem like this is driving me nuts. Should I spring for a gauge and check fuel pressure?
Thanks for your help, Ken
posted by 128.210.6...
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