Mechanics

HIGH REVVING

2006 Mercedes Benz C230

Engine Performance problem
2006 Mercedes Benz C230 6 cyl Two Wheel Drive Automatic 120000 miles

Hi I have a 06 C230 120K miles, I keep it well maintained but recently had problems.
The mechanic I go to is baffled, I have the codes of P0171 P0174 bank 1 and 2.
But the problem is start the car no issue, then tap the accelerator and the idle will jump to 10K+ and stay there, kick it hard and the revvs come down to normal 5/800. If you leave it at 10K it will climb to 20K and then return on its own to 5/800 with a bad idle!

I just cleaned the MAF this made no change at all.
Any ideas or suggestions?

Thank you
Avatar
Pakball
February 26, 2010.




Check out the related content below while we wait for the question to be answered by a professional mechanic.


AD