1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Crankshaft position sensor problems?? (fixed)

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Old Feb 14, 2012 | 02:51 PM
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Originally Posted by pontiacbonnville92
will cutting the cat off make it run like this

No. Have the fuel pressure checked.
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Old Feb 14, 2012 | 06:29 PM
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yes it is getting way to much fuel
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Old Feb 14, 2012 | 10:30 PM
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By to much fuel, are you saying the pressure is way high? If so, your fuel pressure regulator may be bad. I would pull the plugs and check them. If they are black then your running rich.
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Old Feb 15, 2012 | 08:43 AM
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yes they are black and another thing is when i went to get the fuel pressure checked my car would run fine until it got up to running tempeture
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Old Feb 15, 2012 | 10:45 PM
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The AFR is controlled by several sensor. First, the air intake temp, then the MAF, and finally the O2 sensor. But also the engine coolant temp and the MAP. If the engine is going rich after up to heat I would think the ECT sensor may be bad. A test you can try is when it'* running bad, unplug the MAF, the engine will stumble as it switches from live data to internal tables. If the problem goes away, the MAF is the problem. Another thing I would suspect is the O2 sensor. With you having past problems causing it to run rich, this can over whelm the O2 sensor and wear it out.
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Old Feb 16, 2012 | 11:44 AM
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i have a 1994 bonneville and when it hits operating temp it sputters really bad and wont go over 2000 rpms and will stall when i let off the throttle. i have replaced the crank sensor the cam sensor the knock sensor the tps the coil packs and the maf with a known working one and the icm. my fuel pressures are good. i even run the gauge while driving and all is good. i am at a loss and i am gonna try replacing the ecm. the issues your having sound kinda like mine.
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Old Feb 16, 2012 | 02:39 PM
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If I remember right, that year is one that has known ECM problems. Also, did you replace the TPS correctly? It done wrong it will cause problems.
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Old Feb 16, 2012 | 02:54 PM
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yeah i know they can go in wrong but i made sure i got it. i am gonna replace the ecm and i hope that will take care of the issues.
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Old Feb 16, 2012 | 06:51 PM
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the igniton control module was bad
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Old Feb 16, 2012 | 10:47 PM
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Great to hear, I will mark this thread as fixed. Thanks.
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