Maf Check

[Dromara1974]

Hi Chaps,

After enduring a couple of months of variable power delivery and spending too much on various fuel treatments, I eventually decided to check my MAF using the unplug and drive method. I was(am) sure my symptoms pointed to a worn MAF.

When I started to run the car it initially seemed to have much more low down torque when setting off, but it then went into limp home mode within 20 meters and the VSC check light came on!! I have never experienced limp home mode in any other car and I couldn't get the car above10mph when trying to get it back home.

I reconnected the MAF plug and the limp home mode went away, but the VSC check light stayed on and wouldn't go after 5/10 mins of driving - I thought the ECU would run the checks and realise all was well.

I have never heard of another make going into limp home after disconnecting the MAF, and I didn't want to disconnect the Battery as this makes my car run better (initially) and would make it difficult to establish whether it was the MAF or not. I had to reset the ECU to get rid of the VSC check and my mpg has improved( or maybe the redex has done the trick), but a number of flat spots are now resident and my car's split personality is more noticeable than ever!

Does any one know how to test the MAF properly, or is it a case of disconnecting it and the Battery at the same time - will it then run with the MAF disconnected?

cheers

David