Can misfires be false or caused by big cam?
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Can misfires be false or caused by big cam?
ATAP is showing multiple misfires on all cylinders.
The engine starts just fine, but seems to run a bit rough, but so far, I have attributed that to the large duration cam. The cam may be just lopy. Can a large duration cam cause misfires? I am a bit lost in tuning this cam. I do not know what to expect.
The engine starts just fine, but seems to run a bit rough, but so far, I have attributed that to the large duration cam. The cam may be just lopy. Can a large duration cam cause misfires? I am a bit lost in tuning this cam. I do not know what to expect.
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Once sensitivity to misfire was changed, no more codes, ....
How do you changed the sensitivity? Should I desensitize the knock sensor? I think that if the knock sensor picks up knock then the PCM will pull out timing. So this should not be the right direction to go.
How do you changed the sensitivity? Should I desensitize the knock sensor? I think that if the knock sensor picks up knock then the PCM will pull out timing. So this should not be the right direction to go.
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Knock sensors have nothing to do with misfire detection. It is all done with the crank position sensor and the reluctor wheel on the crank. You will never get accurate misfire detection with a cam that big. Set all the misfire tables to their max values. Misfire detection in programmed in stock engine/cals to save the life of cats when real misfires occur.
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Thank you for the advise. I have LS1Edit. What are the step to turn off the misfire code?
I selected Engine Dianostics; then selected teast = P0300; then toggled off "does Error Set SES"; then toggle off Error mode, Type X = turned off.
Will this do it?
I selected Engine Dianostics; then selected teast = P0300; then toggled off "does Error Set SES"; then toggle off Error mode, Type X = turned off.
Will this do it?
Last edited by Doc99SS; 03-27-2008 at 07:05 PM.