Stumbling after Timing belt/ water pump replacement
02-08-2006, 09:02 PM
#1
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Stumbling after Timing belt/ water pump replacement
Looking for help as to why after changing out the timing belt on my 2.8 A6 Quattro the car now stutters at low rpm's. I have 113000 miles on the car and had to replace the water pump so I did it all. I'm 95% sure I have set the timing correctly after replacing the belt. It continuously hesitates at around 30 to 40 MPH especially when giving it some gas. Any help would be greatly appreciated since I have now torn down the front end twice to check the timing belt.
02-08-2006, 09:15 PM
#2
It is that 5% which will kill you
It does not have to be off by much.
However, you should do a VAG to see if there are some fault codes which may guide you.
Did you check all the hoses, such as vacuum lines to see if you did not accidentally loosen them?
However, you should do a VAG to see if there are some fault codes which may guide you.
Did you check all the hoses, such as vacuum lines to see if you did not accidentally loosen them?
02-09-2006, 12:45 AM
#5
AudiWorld Super User
That sounds to me that you do have the timing slightly out. Did you use the...
cam locking bar and the lock bolt for the crank too?
The only other related issues is as mentioned by EgilA64.2 - a loose or incorrectly connected vacuum hose although I cannot think of any you have to dis-connect on the front end.
Does the engine run smoothly at other times, ie, at idle and does it start normally?
The only other related issues is as mentioned by EgilA64.2 - a loose or incorrectly connected vacuum hose although I cannot think of any you have to dis-connect on the front end.
Does the engine run smoothly at other times, ie, at idle and does it start normally?
02-09-2006, 04:28 AM
#6
Hey, what's wrong with that!?
That's how I've always done my I5 engined Audis; of course there wasn't a tool like there is for the V6 and V8.
When I do have to do a TB job on the 2.7, I'll DEF use all the right tools.
When I do have to do a TB job on the 2.7, I'll DEF use all the right tools.
02-09-2006, 04:35 AM
#7
Tools are essential for correct timing on the 2.8.
Since the cam(s) is keyed on the I5, counting teeth will work (but not necessary because you can just use the factory suppied timing marks).
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02-09-2006, 04:38 AM
#8
We need more information.
Were the tools used to do the belt?
What else was touched?
How was the belt accessed; was the front end put into service position, or torn all apart like in the AW write-up?
If you aren't getting a CEL, I'd say the cam timing is off?
What else was touched?
How was the belt accessed; was the front end put into service position, or torn all apart like in the AW write-up?
If you aren't getting a CEL, I'd say the cam timing is off?
02-09-2006, 05:12 AM
#9
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Re: We need more information.
I did not use the tool but had the Crank at TDC and there was no movement in the cams. It is the 30V motor so I am also leaning towards the timing off. I pulled the front off with the link below. The car starts fine but idles low around 550-650. I am not getting any CEL and my scanner doesn't register any codes. Thanks for any help.<ul><li><a href="https://www.audiworld.com/tech/eng39.shtml">https://www.audiworld.com/tech/eng39.shtml</a</li></ul>
02-09-2006, 05:36 AM
#10
The cam tool is essential for correct cam timing.
I'd borrow the bar and check the cam timing again.<ul><li><a href="https://forums.audiworld.com/a6/msgs/576401.phtml">Mega repost for those who are regulars.</a></li></ul>