Mk5 GTI DSG ROUGH IDLE

[gtidsg]

hello,

just found this forum, as I was searching to fix a problem with our gti.

we have a mk v gti dsg and just before xmas it was doing a bit of hunting while ticking over, rev usually should be round 750rpm normally maybe but then it started idling at the 650- 700 rpm to 750 rpm mark. plugged in vagcom and got it cleared and it drove away fine again for a week, then the eml came on again.

sent it to the main dealer and they said it was either an air leak in a vaccum pipe or else the airflow meter. they cleared the fault and it drove normal again for a week, until the light came on again.

I have sprayed carberrator cleaner on all the vaccum pipes and cant seem to see any leak, so I unplugged the airflow meter and took it for a drive, it seems more responsive and it is idling normally when it is plugged out, once I plug the airflow meter back in after 10 seconds it has the rough idle back again, so im assuming it is the airflow meter at this stage.

just wondering had anyone else the same problem with the same symptoms, and was it the airflow meter, I don't want to fork out a wad of cash for an maf if that is not the problem.

any help would be greatly appreciated

[th3_f15t]

Maybe try cleaning the sensor end that sits inside the intake. I know that because I have an oiled air filter, at some stage this will happen to me, and I too will need to clean my MAF sensor. If it works better or for longer after a clean, you can then be assured that was the problem and should it rise up again, you know what to replace.

Start with the simplest and cheapest solution then work up.

[gtidsg]

im thinking that it may be the pcv valve that is my problem now, I cleaned the airflow meter and it is still doing the same thing.

when the car is ticking over it is idling rough, and it takes a bit of effort to open the oil filler cap, allot of suction there, does this happen if the pcv valve is faulty?

[gtidsg]

swapped a pcv valve from a 2008 gti, problem sorted, ordering 1 tommorrow