Hi all iv got a 1991 mk2 8v gti and its recently been developing a very strange misfire type judder when driving in gear.
It used to do this a while back and when it did it would completely cut out eventually, then start back up fine. SO i changed the ignition switch and the coil and cleaned up all my ground terminals and it has been fine for the pas couple months.
Now the past couple days it has returned however this time the car does not cut out it just judders for a split second at completely random times.
To best describe it its as thoiugh someone has cut off the power to the car for a split second and so it feels like it has misfired. Im not convinced its timing related though as the car can run sweet for hours then this will happen randomly and the timing has been set and most of the spark related components have been changed (coil, dizzy, leads, plugs, TCI unit etc)
There has been a fair bit of rain lately so i was initially thinking there was water getting into the fusebox causing some intermittent behaviour, dropped the fusebox today and the carpets and everything in the fusebox area is bone dry, took out the scuttle and cleared any debris, dried it up and made sure sunroof drains were cleared also. CHecked each relay and fuse for water damage but nothing that i can see.
Its almost as if the fuel supply has been cut for a split second or iv lost a spark for a split second or as i mentioned the power has been cut for a split second.
The car can run forever at idle but when its under some kind of load it seems to happen randomly
DOing my head in as use this car everyday and the fact its intermittent is very frustrating! :thumbd:
Can anyone shed any light on the situation?
Heres the car in question :
cheers, daz