Evening chaps

The old shed on wheels developed a serious bit of sluggishness the other day after a long run back from Cornwall. Quickly scanned it and no new codes came up but the widget on the screen suggested the throttle was already open 95% with no throttle on. Took it on an A road and gave it a battering which livened it right up and it was back to it's normal whizzy self. Ok for two days then the Mrs went shopping today with the baby on board and it went back to snail mode. No new codes, throttle more or less stuck on 95%, not much in the way of boost (7lb) and slower than a '95 Mondeo ex taxi with the governor wound right out.

Is the above a sign the pedal and associated sensory is well past it's best or possibly something else? MAF readings seem plausible. Any ideas guys?

Check what reading you are getting from your pre turbo egt sensor

Hello Dozer. Wouldn't know how to do that? Does that need the proper snap on scanner? My mate who looks after my cars had a vw bloke look over it today and found a broken wire to the turbo actuator, which when reconnected made it double slow. Reckons the actuator is clapped as it's only opening half way or something. At least he might be on the right track now, might have it back for next week. When I was a lad a turbo actuator had a single vacuum pipe and it either worked out it didn't. Stuff is Sooooooooo over complicated these days! I hate cars.

You need VCDS to diagnose this properly, the 95% you saw on whatever you were using could be a red herring

 

With VCDS you can check the throttle pedal in the measuring blocks and see exactly whats its doing.

 

I think its more likely to be something else but it would be foolish to change anything until you have properly diagnosed the fault

Edited 19 August, 20169 yr by SuperbTWM