What causes an engine to have erratic ignition timing?
(Read 15983 times) Erratic timing and causes? So I’ve said in the past that no matter what is wrong with your engine that makes for an erratic idle or misfire, one’s ignition timing should be consistent during idle so far as a spark to a cylinder should be delivered at exactly the same time during each firing stroke.
When does ignition timing need to be consistent?
So I’ve said in the past that no matter what is wrong with your engine that makes for an erratic idle or misfire, one’s ignition timing should be consistent during idle so far as a spark to a cylinder should be delivered at exactly the same time during each firing stroke.
Can a timing belt change cause rough idle?
Just throwing a possibility out there simply because it has been known to happen before.
Why does my car idle all of a sudden?
The bouncing timing can cause a stupid idle and could be caused by a crank sensor circuit problem. Note “circuit problem” which includes the wiring and connectors. Just curious about the vacuum reading. You state that you have 17″ instead of the normal 21-22.
(Read 15983 times) Erratic timing and causes? So I’ve said in the past that no matter what is wrong with your engine that makes for an erratic idle or misfire, one’s ignition timing should be consistent during idle so far as a spark to a cylinder should be delivered at exactly the same time during each firing stroke.
What should the ignition timing be at idle?
Increase the ignition timing at idle to 25°-30° BTDC. If your camshaft is really that big, it will like the high initial timing. If you push it out to the 25°-30° range, disconnect the vacuum advance and test drive. Vacuum advance will typically advance 14°-15° if still stock.
The bouncing timing can cause a stupid idle and could be caused by a crank sensor circuit problem. Note “circuit problem” which includes the wiring and connectors. Just curious about the vacuum reading. You state that you have 17″ instead of the normal 21-22.
What’s the best idle timing for a camshaft?
Try running about 21 or 22 degrees of initial timing. It will help with two things. It will stabilize your idle AFR by giving the fuel more time to burn and raise your idle rpms by 100 – 200 rpm.