Tuesday, April 07, 2015
have a 2002 buick lesabre 3800 engine misfire
has check engine light on and it FLASHES. it says p0300 which is a random/multiple cylinder misfire detected. so far i replaced all spark plugs and wires. i replaced fuel filter and put emergency brake on and put in reverse (it only misfires when in gear not when idle) and i sprayed all vacuum lines with wd40 which is supposed to make it stop misfiring if its a vacuum. cant seem to find problem. what else should i check? i thought about fuel injectors but is there anyway to test? i have some fuel injectors from a 1995 Buick Lesabre. would they probably hook up and work if that's problem? it has coil pack but can they be tested?