Mechanics

POWER LOSS

2004 Vauxhall Zafira • 70,000 miles

2.0 diesel wont rev past 2500rpm and max speed 69mph no smoke runs fine just no power slow on take off and preforms as if a restrictor is in place
AD
Avatar
Billy31
September 4, 2012.




Any trouble codes or dash lights indicating?
Any repairs carried prior to this?

Could be a throttle faults, restricted exhaust system or air intake.


KHLow2008
Sep 4, 2012.
No trouble codes or any dash lights no repairs as yet


Tiny
Billy31
Sep 4, 2012.
Start by checking the basics, fuel filter, air filter and exhaust blockage.
AD


KHLow2008
Sep 4, 2012.
Hi,
Might well be worth checking the exhaust manifold switchover valve vacuum pipe. The switchover solenoid valve sits in front of the egr valve to the far right of the engine bay. It has a (usually) white plastic pipe which runs to switchover valve at the right of the inlet manifold. If split or holed it will prevent the manifold switching to the longer manifold length and restrict your rpm and power as per your problem.
Hope this helps,
Ed


Tiny
Edcoombs
Sep 11, 2012.

AD