I have a mk4 Golf 1.9 GT TDI on a 1999 plate. Recently there was a hissing noise from the passengers feet area. It turned off as soon as you would turn off the climacontrol. When investigated by my local VW specialist, he came up with the conclusion that there was a value that needed replacing.
On the invoice this is noted as a 'Air con expansion value' (£62.68 ex VAT) and was charged for a re-gas. This was all fitted and i was billed. However, i have had the car back a week and the noise is still there. I have returned to the garage and he has said it may be a fault on the compressor and to let the fault develop.
After this so called repair being carried out, the car does now not idle correctly as there is a constent judder when stationary at traffic lights. If the lights are on full and the radio on, the lights will flicker and rev counter drops.
I have lost confidence in the mechanic as he cannot pinpoint and find the fault on air con unit or the constent juddger/rattle from engine.
I went to a different independer volkwagen centre in leeds and they plugged in the computer. It was reading fine, apart from air mass sensor which was slightly out. Other then that he said there was no other errors.
He reset the ECU for me and put some cleaning agent into the petrol tank, as he believes a pipe maybe blocked, as I have been fillin from a supermarket petrol station. He said that they do not have as many cleaning agents in the fuel and to try and run that through the system to flush/clean it.
The hissing noise could be normal as the system does hiss after being shut down. The poor idling with no fault codes is odd, has the car been chipped or had a tuning box fitted? Was the company in Leeds IVC?
No the car is standard. Yes it was IVC in Leeds that i went to the other day, not the garage that carried out the repairs. IVC was really helpful. The hissing noise has come about recently, I have had the car for a year and it never made that noise before.
Yeh they were very helpful!!! Ill book it in with them and see what they say. Sorry im not very car technical, what you mean by engine code? is this off the scan done at IVC?
A 110PS (81Kw) TDI. When was the timing belt done? It may be worthwhile getting IVC to check the "commencement of injection" and valve timing if there are no fault codes.
The previous owner had belt changed on 13/6/03 and mileage was 57,847. The car is now approaching 115,000. Am I right in thinkin it needs changing at 120k? Il make a note of your recommendations and tell them when I take it on saturday.
It might not be the same thing but my Golf was doing a similar thing except the symptoms were slighty worse. I had a farly loud squeal and the the power steering made clunking noises from under the bonnet. It started out much the same as you decribed though and I just put down to the car having done 85k miles and reckoned I'd get them to have a look at the next service. In my case it turned out to be the "Serpetine Belt" I don't know if that's the real name or just the mechanics pet name for it but it's was once known as a fan belt anyway. The tensioner had gone on mine which was causing the belt to flap around too much. That belt apparently runs the air con condenser, power steering pump and a couple of other bits as well. All in the job cost about £140 inc. VAT. I think the parts were about £60. I didn't know one belt could make so much difference as it runs better than it has done for months.
Just a quick update to the situation. The car has had a VAG-COM test run and no error codes came back. The mechanic has come back with the solution that it could be an injector so this is the next step to trying to solve the problem.....
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