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, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
98 SE-
When Im driving the rpms jumps around a little and if you floor it the engine bogs and the rpms jump up and down more noticeably. I thought it only happened when I floored it, but I took it out for a drive with everything else turned off and the rpms jump even at low speeds with minimal acceleration. It also seems to run rough when its first started. The spark plugs and wires have less than 30,000 on them, and I have a K&N intake which I just installed about 4 months ago so I don't think those could be the cause. I was thinking maybe the MAF needs to be replaced or cleaned? Or I could possibly have a bad wire or plug in there somewhere? The engine throws no codes though, and the oil and coolant looks good, any ideas on the cause?
Hopefully its something easy, I've been staying out of the gas and I miss using my leadfoot Although I'm probably getting some better MPGs
2017 Cruze RS
2008 Aura - Totaled
Sold but never forgotten:
1998 Bonneville SE
1992 Bonneville SE
I had similar problem until I took off trottle body and cleaned it and also replaced pcv. And yes it may very well be the ignition module or something simple as bad sparkplug or plug wire.
New spark plugs and wires got her running good! I think I had a bad wire, one boot broke in half with just a little pull. So I ended up ordering a new wire set then decided to throw in new plugs while it was apart. Ended up going with ACDelco Platinum plugs and Bosch wires since they ran out of ACDelco
2017 Cruze RS
2008 Aura - Totaled
Sold but never forgotten:
1998 Bonneville SE
1992 Bonneville SE
Although I'm probably getting some better MPGs
