i have been trying to get my tt auto to idle a bit better and it has been getting better and better. so far i have

 

cleaned out throttle bodies

fixed lots of vacume leeks and replaced all vacume hoses with silicone

cleaned maf

cleaned all injector connectors and replaced plugs as they had broken up except back two.

cleaned coilpack connections and replaced connectors

sorted out failed electrode between coilpack and plug (small carbon bit on a spring)

removed carbon canister

cleaned up temp sensor and fitted new connector

checked tps voltage

 

i think that is it

 

however there is still a bit of a vibration at idle. i know i have a knackered gearbox mount so that wont help but this will be sorted with a manual conversion.

 

tonight i decided to clean up the two remaining injector connections and solder on the new plugs aswell as a clean out of the idle valves.

 

while doing this i thought i would clean out the pcv valves which looked good from the outside. however although they are perfectly clean inside the valve is free to move around. the spring is not holding the vavle onto the seat so must be letting in large amounts of air on idle.

 

in anyones experience will this improve my idle (i have just ordered 2 new valves) and could this effect the performance?

 

ill post with the results but id like to know if im on to a winner. i will get the car to idle perfectly!

Thats normal for the valves, should rattle around inside. Slides whichever way up your holding it.

oh well, thought id found the problem. ill change them anyhow