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Old 09-01-2017, 05:07pm   #1
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Default High RPM misfire

When I normally take off at full throttle I hook up and go with no hesitation or misfire.
Today when I power braked it it would drop a cylinder, let of the brake and it went away and tore off
When I was doing a burnout the engine started to misfire just over 5500rpm

I don't believe that I have a rev limiter so maybe a bad coil?

25k on plugs and wires
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Old 09-02-2017, 08:24am   #2
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Try this:

How to Access C5 Corvette Diagnostic Codes
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Old 09-02-2017, 09:45am   #3
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Every C5 has a rev limiter. Keeps you from grenading the motor by accident. Check the codes and let us know what comes up.
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Old 09-02-2017, 12:07pm   #4
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No PCM codes, just thought that it was strange that it does it during a power brake event
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Old 09-03-2017, 07:40am   #5
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Traction control off?
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Old 09-03-2017, 08:39am   #6
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Yes sir
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Old 09-03-2017, 09:53am   #7
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Yes, the C5 has a rev limiter. Unless the PCM programming has been modified, it will cut fuel and the engine will stutter at 6200 rpm. (6500 on the Z06)

You noted "just over 5500", but when doing a burnout, the engine is spinning relatively unloaded (as compared to doing the work of accelerating the car) and it's very easy to fluctuate the engine speed that much in a split second. Also consider the fact the tachometer in these cars has significant lag. You might have seen 5500 indicated when revving, but the engine was actually spinning faster than that.

From the description I think you simply hit the rev limit. It's not a big deal, causes no codes, just a protection mechanism doing it's job. If you had it breaking up while accelerating in a high gear where the engine is heavily loaded and climbing in RPMs slowly....Then my answer would be different. An actual misfire event will usually throw a code.


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Old 09-03-2017, 10:06am   #8
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I agree, a split second glance isn't a factual read.

The rest of the story, one of my front tires has a bad spot from driving it in a wheel that had a barrel bend in it from a put hole. I rotated my wheels and put it on the street to true it up, tire has 9/32 if tread left and hate to junk it.
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