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Old 05-12-2013, 11:41 AM   #1
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Join Date: Jan 2013
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Default Rough idle, p0300 code

Hi guys, this is my first time to post, ive been reading a lot of threads but cant seem to find the exact answer im looking for.

07 tahoe Lt with 168000 kms in it. Car runs fine since then and made a tune up just last month. Changed the spark plugs(ngk), plug wires(acdelco) and an oil change.

Today i was driving then suddenly the car was vibrating hard from the engine,the car didnt die but very rough in idle. Plugged in a scanner and threw a p0300 code. Made some tests and cylinders 1,2,4 are misfiring hard and cylinder 6,8 a little bit.checked my wires and they are all intact.

Where do i start looking? Is fuel a possible cause? Because the car was near empty yesterday so i gased up just near my houset then parked it already, today i went to places but not too far then suddenly the shaking began.and is it safe to drive the car because im out of town and i need to drive around 150kms to get back to town and to a dealer if ever.

Need help pls.....
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