Having problems with your 2000 Buick LeSabre ?

I have a 2000 buick lasabre that has been running very rough, my son put computer on and it said bad o2 sensor, he replaced sensor, and it is still running rough, but the computer now says cylinder 6 misfires, he replaced the coil pack 5-6 with 3-4 to see if it would read cylinder 4 misfires but it did'nt. It seemed to run good for a day, then it started running rough again. the check engine light came back on and cylinder 6 again. Does anyone have any ideas before he nickel and dimes me to deat

Posted / edited by AnonymousUser on : 26-10-2020

Answers :

Plugs and or wires.
\015\012for some reason the spark is jumping out of the wire or plug.
\015\012the plug insulater may have a crack in it.
\015\012also use a carb spray to clean out the throttle body at the throttle plate.
\015\012all the black carbon will build up around the throttle plate and restrick airflow at an idle position.
\015\012
\015\012hope this helps
\015\012thank you
\015\012jm
> I just had this car on the highway going 60 and it ran like a dream\015\012
\015\012Once the RPMs are up some, it's tough to recognize a miss on a 6-8 cylinder engine but this is another good reason to keep a check on fuel consumption; you may not feel it but with one cylinder missing randomly, it will affect mileage and it is normal to correct missing power with the gas pedal.\015\012
\015\012The lousy Saturn I owned until it committed hari-kari at 57K had three out of four sparkplug leads leaking like crazy and it was really only noticeable at idle that the engine was running rough.\015\012BTW, those leads were under three years old when I replaced them with silicone insulated leads.\015\012Looking in the engine compartment at night was entertaining - sparks everywhere.\015\012GM could give them away and I'd refuse to run down to get one.
Repair Help & Product Troubleshooting for 2000 Buick LeSabre

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