my 95 z28 has been having stumble/hesitation in low rpms.....i have a popping backfire once the car has been running for more then 2 minutes...it gets worse as the car heats up more...im running lean code 44 which is makin the car get horrible gas mileage....today the car wouldnt start...it would turn over but not start...like it wasnt getting any fuel.......maybe the fuel filter is clogged?? could this cause the stumble?? thanx alot

 

I've always checked spark, fuel, compression, in that order for no starts.