On Alfa number 15
AO Platinum Member
Join Date: Dec 2005
Location: United Kingdom
Re: 156 Power Loss at Higher Revs
I would bet that they did not use the correct timing blocks when they fitted the belt. Incorrect cam timing can cause the symptoms you describe.
When they say they got the timing "Spot on" how did they check it?
This is a common issue, my 156 drove ok when I bought it, but I did a routine cam belt change as I wasn't sure when it was last changed. The cam timing was quite a way out, and the car now has far more "Bite" at the top end.
The other possible cause is a Faulty MAF sensor.
You will never be cool driving a Vauxhall.
Last edited by symon; 17-10-07 at 09:52.