Rough idle multiple misfire

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Hi, have a 1997 monte carlo 3.1L. I had problems with multiple misfire, trouble code p0300. Car has 126,000 miles on it, so I replaced fuel injectors, new lifters, new valves, new plugs and wires. After all this I still have a rough idle and multiple misfire. It seems like a vacuum leak problem, but can't find one anywhere. When driving the car it runs fine but when I stop and let it idle the service engine light comes on and the code reader reads 2 errors and both are p0300 multiple misfire. Any ideas would be appreciated. Thanks Jimt

posted by  jimt

You might want to repost this in the appropriate location if you want some good feedback. This is the intro section. :thumbs:

posted by  fc7gtx

thought I had switched to other section. jimt

posted by  jimt

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