Having problems with your Cars & Trucks ?

I have a 2003 olds alero 2.2-4cyl ecotec it misses in park,have replaced ICM& coil,new plugs,rubber spark plug boots,air filter,the rpm guauge is not steady when in park and engine running,the rpm guage is not steady when car in in park and running,the cataylic conv has been done away with,the codes arepo141&po 300,random misfires,could a engine vaccum leak cause it to miss and the missfire

Posted / edited by AnonymousUser on : 23-07-2018

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