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Old 03-31-2008, 03:42 PM
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Re: 2001 Jimmy 4x4 4.3L misfire after replacing lower intake gsket

You've done several things, any one of them could cause the rough running.

What brand of parts did you use?

Check plug wire location on the distributor cap: passenger side, front of vehicle to rear are cyls 2, 4, and 6. Driver side front to rear are cyls 3, 1, and 5.

Check the power brake booster vacuum line. The booster draws vacuum from both 5 & 6. If the line is leaking, both cylinders will run lean.
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