Generation III Internal Engine 1997-2006 LS1 | LS6
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Old 05-16-2011, 11:40 AM
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I have a 2002 z28 ls1/m6

Where to start I ran the check engine light and it came up random missfire. I took it to a local shop And they said it was cylinder 7. I changed plug, coil and wire and the miss has not went away. At normal idle their is a small miss but when I take off there doesn't seem to be loss of power. I notice when I'm on the highway at 70mph in 6th gear at 1500rpm check engine light turns on. I can down shift till 5th and stay at 2000 rpm and the light immediately turns off. I notice a exhaust leak this morning coming from the driver side... I feel like I can't get rid of this problem soon I'll get rid of the car!! HELP please.
Old 05-16-2011, 04:40 PM
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It could just be the exhaust leak messing with the oxygen sensor causing the rough idle. If you don't notice a loss in power then it is likely not an actual miss. I wouldn't waste any more time/money changing parts until you fix the exhaust leak.
Old 05-16-2011, 08:01 PM
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Thanks a lot, I'll try tomorrow and let you know
Old 05-16-2011, 08:42 PM
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Whats the setup? Any cam? Rockers? Any recent work done?




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