Just wanted to know how stable the timing should be with a timing light? This may have something to do with the rough idle on my EL I6. Anyways with the timing light running normal the timing mark seems to be jumping back and forth about 10mm or in diagnostic mode about 5mm +/- from TDC. Is this normal?

Last edited by joolz on Wed Dec 12, 2007 8:43 pm, edited 2 times in total.

hey there i know mine on the eb does the same thing with the timing light then when i put it in park my idle goes up and down a bit cant seem to stop it but in drive its fine