I have a 1999 grand prix gt. 2 days ago it started running bad and by
yesterday it would not start at all. It sounds like it wants to start but
it won't. I have checked the fuel pressure,good. I checked for spark. I
also checked the ignition module and coil packs, both good. I replaced the
cam and crank sensors. The diagnostics reads "multiple misfire" code p0300.
I am at my wits end. Can anyone help