My mates scoob idles rough and surges on tickover. could it be the MAF and if it is can u clean it out? all help appreciated

cheers

 

My 01-02 WRX did this recently, On advice from peeps on here i cleaned the MAF with brake cleaner (aerosol). Use only one that leaves no residue of any form. I think it cured mine........ so far any way.

It was throwing a CEL and fault code P0171. Havent had it re-set yet due to a one month driving ban

Aston

 

Could be any number of things, ranging from MAF / o2 / ISCV / TPS....

Any fault codes? What MY? Poor MPG?

MB

 

Hi, mpg seems fine and it's just had a new lambda. It's ok when cold, but it starts after it has warmed up (quite a long time after). It fluctuates between about 6 and 800 revs.

 

Right, just sprayed half a ton of brake cleaner on the Maf and it still appears to have a dodgy idle, it's only very slight at the moment but thats probably because it hasn't warmed up properly yet. Does anyone have any more ideas??

 

If the MAF has faile / is failing, cleaning it normall doesn't do much good. Its vert delicate, so even cleaning can sometimes damage it.

When its idling badly, unplug the MAF. See if the idle sorts itself... Make sure you plug it back in before driving.

MB

 

May be a daft question , But has to be checked, You have not fitted an after Market dump valve have you ???

 

I have fitted a forge yes, been on the car almost a year without any problems so far.

 

Give it a good clean out. Might be sticking open a bit, causing an air leak...

MB