Cool Ying YangJust called the RAC out tonight with a similar issue. Also noticed a hissing noise on idle, and HE found the vacuum pipe had come adrift. Put it back on and cable tied it for better attachment and all is well.
The vacuum pipe was between the engine and the cooling fan, and it simply pushed onto a green connector!
Guy doesnt know what he was doing... should nt have changed anything unless error codes said to... he should have cleared them all first then driven then found what was wrong....got the car back from garage 2dy and its doing ma head in now! the
dude at the garage first thought it was the coil packs so he chaged
that then he had a lookat the maf so he changed that then the lambda
sensor and changed that he checked out the wiring and thats all fine so
he ran diaognostic aswell and fixed all my error codes but stillit had
the same problem so the dude said that it might be summink to do with
he said that hell fit in another 1 from the same golf and if its fixed that means my ecu is buggered.
got sum1 from AA cummin round 2mo to get a second opinion!
Good point!! Could be the dampers in the duel Mass flywheel that are knackered Are you sure its not the flywheel?? Mine does exactly the same and no error codes etc come up. When you pull up slowly at traffic lights you can feel the car move very strangely!
You could also try (as a basic remedy) cleaning the contacts on the coilpacks and the ignition amp.. mine was juddering and misfiring inconsistently for ages until I did this and it's been fine for ages since. Maybe as simple as this though I doubt it, but it's gotta be worth a try !Mate,
As Andy mac said, ecus dont partially fail.if the coilpacks have been checked and are ok, (the mechanic should have ideally
swapped each one out in turn to find the faulty on), he should be looking at the ignition amp that sits on the side of the air filter
box.This amplifies the signal from the coilpacks to the ecu.If this is buggered then it will cause all the problems you describe.
This is what he should have also swapped out to check.Id get on the phone to him and get him to test this before anything else