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Just replaced plugs on 2001 Intrigue runs worse what did you do wrong?
Wiki User
∙ 16y ago
Did you use factory plugs (NGK)? The aftermarket brands (splitfire, various other multi-tip platinums) do not work as well as the OEM AC/Delco plugs, which are actually made by NGK. It sounds good, but for some reason do not perform well. Check the coil packs and shunts to make sure they are in good condition and properly fitted and tight. Make sure you torque the plugs down using a torque wrench to 20ft-lbs. When I changed my plugs at 90K miles, I missed something, and the car sputtered until I took the plugs back out and rechecked and reset everything. After that, it ran like a champ. Other stupid stuff like clogged fuel filter, plugged up PCV valve, leaky vacuum hoses, etc, can cause the engine to run rough suddenly. Make sure you didn't mess up something like this in the process of re-plugging.
I removed the following: Try resetting the engine controller by disconnecting the battery for 5 minutes and reconnecting. After that, the car may run a bit rough until all the sensor settings readjust to the new exhaust composition. Because that doesn't work on GM cars after 1996. Make sure all of the connections are tight.
Wiki User
∙ 16y ago
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