My 1998 Chevy Blazer S10 gets an 'intermittent misfire code' when I try and get it smogged in California. The code comes back when the vehicle is run up to 2500 RPM for 2 minutes, part of the All other values on the smog test. are good

Asked by Oct 29, 2016 at 12:11 PM about the 1998 Chevrolet Blazer 4 Door LS 4WD

Question type: Maintenance & Repair

When I try and get my1998 Chevy S10 Blazer smoked in California, it fails and
gets an 'intermittent misfire' code on the computer. All other values are good.
The code can be cleared, but reappears when the engine is run up to 2500
RPM for 2 minutes, part of the smog test. My mechanic cannot figure it out.
Help! Thanks.

1 Answer

56,575

Sounds like an ignition system failure. Usually when you get a misfire under load it's an ignition coil breaking down. HTH. -Jim

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