P300 code 1998 olds 88 autozone told me p300 code firestone said coil 1 and 4 i have replaced 3 coils, 6 spark plugs, 6 plug wires, radiator, top hose, bottom hose, thermostat and is still misfiring really bad any suggestions?
Cars & Trucks - Oldsmobile - 98
Answers & Comments
Dont go to firestone, those coils you changed might have been good, did you check for power to coil? did you ohm your injectors?
ok, Injector Voltage Reading
4.7- 5.8 Volts, and Ohms
11.8-12.6, you can also just unplug the power to the injector to see if it is worse or better.