Changed the timing belt and the timing was advanced above the specified range. I retarded the timing a little by rotating the injection pump. Timing is now 65 and 100, in the middle of the advanced band. Then I checked the specified start of injection and actual start. Specified start should be between 2 and -3, but now it cycles between early and late. Actual start should be between 2 and -3, but it's between 3.7 and 7.9 When specified reads late, actual is 4.2 and when specified is early, actual is 7.7 Before the timing belt change specified inj start and actual start were within spec. My guess is I'm a tooth too advanced on the injection pump. Somehow I rotated it one tooth counterclockwise. Does that make sense? Remedy is to turn the inj pump sprocket on tooth clockwise and then reset the timing?
Passat injection timing after belt change
- Thread starter RabbitGTI
- Start date
John Beyer
Veteran Member
If I were you I would recheck everything by setting the crank at TDC (by the mark on the flywheel), the Cam at TDC using the setting bar and using the pin in the pump. Then loosen the cam sprocket to reset it if it's off.
Good Luck
Good Luck
I know the crank and cam are on TDC and the car runs great. I also thought the inj pump was on TDC.
Thanks!
<font size="2" face="Verdana, Helvetica, sans-serif">Ooooooops, maybe that is what I screwed up. I'll hook it up again today and let ya know
Thanks!