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.

Check Engine light.........

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Old 01-10-2009, 02:20 PM
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Default Check Engine light.........

In following advice from the forum I have been chasing an intermittant Check Engine light which has also led to wierd tranny symptoms...........as a disclaimer, I have been delivering flyers the last few days so the car (95 SE) has been idling quite a lot with really short 2 block jaunts between deliveries for periods of up to almost 3 hours. The temp guage shows a hair above 220 with both fans running and this is when the CEL light comes on and the tranny shudders/stutters and double shifts kinda.........once the car cools back down it almost goes away..............is the tranny acting up related to the hot motor and/or the CEL light or both?

I have already installed new wires and 02 sensor and dropped the tranny pan and changed filter with new fluid............magnet was pretty clean and fluid was clean and red, filter had some slight sludge..........any ideas???

FYI, Autozone tried reading the codes but scanner would not communicate, port is a OBD II configuration.......
Old 01-10-2009, 02:26 PM
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You have OBD1.5, you need a OBD2 cable and a OBD1 reader.

Your trany my be over heating. If that'* the case a trans cooler my help.
Old 01-10-2009, 03:30 PM
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funny thing, my work van was just doing the same thing. Turned out to be a 99.9% plugged fuel filter.

when was the last time you replaced yours?

If the motor is fighting to get fuel it will screw with your tranny shift points making it seam like it is shifting weird.
Old 01-10-2009, 03:47 PM
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good point Todd.............I just got the car so who knows...........dang, another thing to replace....
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