98 lumina 3.1 missfire

My 98' lumina 3100 missfires at all engine speeds it has a trouble code p0300 random missfire. I have replaced the module and coil packs spark plugs and wires, the mass air flow sensor and the fuel filter, i also did a compression check and fresh gas any ideas on what could be wrong the car idles rough and stumbles on acceleration at all speeds it will rev up put cuts out thanks

A bidirectional scanner can do a power balance test to pinpoint the cylinder, than you can focus on a bad injector if this is a dead misfire. These parts were put to eliminate this problem?

was just about to suggest checking the injectors... you could always pull the pug wires as it runs... if it runs worse, that cylinder is fine, if there is no change, theres the cylinder thats giving you an issue....

The fuel rail and injectors were full of rust that was causing the missfire thanks for the tip maxwedge

I am having a similar problem, what kind of mileage and history does your lumina have?

Thanx