Re: # 1 spark plug does not fire.
Motor started running rough about 2 weeks ago. I had codes read, 301,305,300,442,340,455. I changed spark plugs (they were long overdue), still running rough. will idol and riv up good, but when i put it in gear and try to drive it, it is real bad. Listened to fuel infectors with steto. , # 1 was not working, so i replaced it. Still running rough. I traced wire back to computer, checked ohm, unpluged from computer, some time durring all this, the injector started working. I cleared codes and # 305 come up. I cleaned throtle body and checked fuses and any wire connection i thought had anything to do with this. Pulled coil pack off plugs, #1 is as clean as when I put it in, #2 & 3 had some buildup on them, I let it run idol for about 20 min. and drove it about 2 miles, still no code and still running rough. Is it possible the coil pack is bad.