cylinder misfire

[thaone972]

My 99 Malibu 4 cylinder has had a long line of problems. The current issue is that my check engine light came on and said that there was a cylinder 1 misfire. The engine started running rough and I was burning through gas like crazy. The car didn't want to go uphills and I had to floor it just to get to the top. I changed the spark plugs, boots and coils. The light came back on a few minutes later and said cylinder 1 misfire again. Any ideas of what else it could be?

[bcopeland]

Is it making any type of sounds?

[thaone972]

No it's not making any noise, just shaking. Every once in a while, while i'm accelerating it kicks in and takes off

[bcopeland]

Check your PCV value to see if it is clogged or to see if the hose is cracked. Also check your gas cap.

[richtazz]

It's probably the fuel injector on that cylinder. Since you changed the ignition components, and the miss stayed on the same cylinder, that points straight to an injector.

[thaone972]

I finally found the problem, it wasn't the gas cap or the pcv valve. When i changed the spark plugs i used bosch platinum, i tried champion plugs instead and the problem went away. Thanks for the advice