Jimbob_S3 Posted July 19, 2005 Report Share Posted July 19, 2005 Hi all. Couple of months ago I had a new MAF installed due to engine management light coming on and being traced to MAF (determined by 'fuel to air ratio too low'). After the new MAF was fitted power increase felt immense (I hadnt realised car had gone slow, must have crept up on me). Car was great for about 2 weeks then I thought the power seemed to have gone again. Checked under the bonnet one of the vacuum hoses was split. Its temporary fixed whilst the part is on order... but the power still seems down. I don't have the significat boost in 2nd and 3rd gear which I had a couple of weeks ago? Sometimes the car feels boosty then drops off, but easing off then onto the accelerator seems to return the boost. Can anyone help...? i need my power back!! After reading all the posts should I change the DV for the sake of £20 to eliminate it? Car is 2001 X with 87k. Cheers Link to comment Share on other sites More sharing options...
kalheer Posted July 20, 2005 Report Share Posted July 20, 2005 I'd say wait for the part and see if the problem still occurs? Link to comment Share on other sites More sharing options...
Jimbob_S3 Posted July 20, 2005 Author Report Share Posted July 20, 2005 Will do. Going away for a couple of weeks, part should be here when I get back, I'll let you know if it makes any difference. Cheers Link to comment Share on other sites More sharing options...
S3_Dan Posted July 30, 2005 Report Share Posted July 30, 2005 Hi - I had the same issues with my S 3 recently. About 6 months ago I had the MAF changed and all was well - but recently - and like yourself - it creeped up on me, my performace had gone and I had no real power when accelerating. Anyway I ended up taking it to the local Audi garage and they found that my Pressure Control Valve was faulty and was causing my turbo to overboost, which resulted in the ECU shutting down the turbo. All fixed now, but £130 out of pocket Link to comment Share on other sites More sharing options...
kalheer Posted August 2, 2005 Report Share Posted August 2, 2005 Thats not a bad price.. Link to comment Share on other sites More sharing options...
Jimbob_S3 Posted August 2, 2005 Author Report Share Posted August 2, 2005 Thanks for that. Any idea if I can test the pressure control valve ? (I've just got VAG COM but havent had chance to use it yet.) What was the price for the part ? The turbo is working but the powers is varied sometimes boost is strong othertimes there seems to be nothing. The dealer still hasn't provided the hose, theyre making up all kinds of stories.... its frustrating. Might change that diverter valve anyway - seem to have had everything else! Link to comment Share on other sites More sharing options...
Drillslinger Posted August 2, 2005 Report Share Posted August 2, 2005 Dan, which valve are you refering to? Is it the black plastic one that sits in the intake hose behind the DV? Link to comment Share on other sites More sharing options...
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