Thread: backfire/miss

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okay heres the skinny....

1) Is the popping consistant? if so it's either a worn cam lobe or a worn off lifter.....If it was a burnt valve it would pop all the time..

2) if the popping is not consistant.... check the plugs....all of them...what color are they.....should all be a lightish tan...

if they are black you are too rich....could cause popping....
if they are white you are too lean.....could cause popping... and burn stuff....hope that helps..


Too check for a worn lobe or lifter..... pull the valve covers.... rotate the engine over and watch the rocker arms...

On a worn lobe....the lifter will usually go farther down in the bore...but not always... check the travel... watch the rockers go up and down.... you'll have almost a half inch of travel.... the one that doesn't move as much is your culprit...