I wish I knew.... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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.

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Old 09-20-2009, 09:33 PM   #1
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So my 97 Bonnie decided two days ago to start running like crap. I changed the plugs and wires hoping I fouled a plug or wire but that didnt seem to help. I left a red light earlier today and it misfired pretty bad, sounded like a backfire from the motor. The check engine light is still flashing and its power comes in surges. I tried to run the codes from the diagnostic point but cant get a reading for some reason. Does anyone know if there is a fuse associated with that? I have had this car for 6 years and the most work I have had to do was put an intake manifold in it....I guess maybe it has finally caught up with me
If anyone has any ideas I would be very grateful..thanks in advance!!
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Old 09-20-2009, 09:37 PM   #2
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You will need to get the car scanned so we have a code, that will help find the problem. The first place I would start is with testing the coils.
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Old 09-21-2009, 08:18 AM   #3
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Yes,the DLC does have fuse. Look for DLC or pcm/ecm type fuses.

Flashing engine light is usually signs of a misfire. The FSM states a flashing light is a possible catalyst damaging condition.
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Old 09-21-2009, 11:36 PM   #4
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I was thinking that I may have a go at the coils...
Apparently when the diagnostic went it took the stereo with it which is why I was thinking it must have a fuse somewhere. Not sure if there connected somewhere or blew two fuses but Ill check if I get a chance.
I appreciate the help so far guys and will update when I get a free five minutes from work.
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Old 09-23-2009, 12:57 AM   #5
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Do you have an aftermarket stereo? Check the wiring behind the stereo for poorly made connections.
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Old 09-23-2009, 09:18 AM   #6
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I need to check that to cause all the fuses appear to be good. I definatly have a bad coil, the "3/6" coil is not firing so I'm going to get one today and hopefully things will be back to semi-normal. Then its on the the stereo to find out what its problem is. If i remember correctly there should be a fuse behind the stereo somewhere, so maybe thats the problem.
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Old 09-23-2009, 10:54 AM   #7
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Stock radio has a fuse in the fuse box. And IIRC it also powers the DLC
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Old 09-23-2009, 11:39 PM   #8
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One problem figured out...It was the coil pack and its running like a champ again. The stereo half works, kinda like a voltage surge but I still need to check the fuse in the stereo although I highly doubt thats what it is. Probably time for a new one.
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