Quote:
Originally Posted by marinabrian
Look at the live data of the MAF while very gently increasing the revs from tickover.
If the mass airflow readings drop to <350 mg/stroke then increase the revs to over 2000 RPM briefly and then release the throttle pedal and allow the car to idle.
Then note the MAF readings, do they recover within five seconds to circa 495mg/stroke, or does this take considerably longer?
The off load figures you quote look to be well within spec, nigh on perfect in fact, so I suspect the EGR operation is the problem here 
By the way I always disable EGR operation before resorting to unplugging the MAF, because unplugging the MAF also disables EGR operation, so a completely perfect MAF sensor can be classed as poor, when in fact what is happening is the EGR sticking
Brian  |
Thanks Brian,
I accidentally deleted previous message.
I'll do the thing you mentioned.
As well, how can i disable EGR operation you said?
And how to repair EGR if that is the case?
Thanks