Hi guys, been through lots of other threads but struggling and I know some of you really know your onions on the 8v's.
Having what seems to be pretty common - 8v gti cutting out, almost cutting out and erratic/tempramental idle speed problem that seems to plague many mk3's. I have the AGG (R reg) model.
When idling, the rev's drop down and the car sounds like it is stuttering, then the rev's even out - even a quick burst on the accelerator can upset it again. Also when approaching junctions, clutch goes in or gear into neutral the rev counter goes right down, oil light, battery light etc comes on, sometimes it does stall other times the engine just about recovers, then stutters erratically again or just calms down.
Previously car has had new MAF unit and coil pack. HT leads and SP's were new two years ago and recently checked. Also had a new crank shaft sensor about a year ago as the car totally died on me one a long run.
My breather hose has split in half and a new one going on this weekend but i'm not convinced this is the problem? also going to clean the throttle body this weekend - maybe the problem? i understand the AGG's don't have an Idle Stablisation Valve?
If non if these, is it easier to get one of those diagnostic tests done by VW to try and source problem? do they always tell you where the problem is? rough cost? Money is usually the bottom line here!
could this also be;
- the lamda sensor ? where is this located on the 8v AGG engine? the Haynes manual is pretty useless when it comes to AGG referencing!
- distributor?
I know this problem is common but people never seem to get to the bottom of it! Very frustrating!!
Any help appreciated. Apologies if this has been covered more precisely in another thread as it can be annoying.
Thanks v much
