postiepat Posted October 10, 2011 Report Posted October 10, 2011 I have a suction noise that is only heard whilst driving and is louder if you accelerate hard, you cant hear anything whilst stationary and revving the engine though? Im getting frustrated with this car now, its a mk 2 1.9 tdi 2003 , please help :rolleyes: oh and its easier to hear whilst windows are up Quote
Amarok Posted October 10, 2011 Report Posted October 10, 2011 (edited) I have a suction noise that is only heard whilst driving and is louder if you accelerate hard, you cant hear anything whilst stationary and revving the engine though? Im getting frustrated with this car now, its a mk 2 1.9 tdi 2003 , please help :rolleyes: oh and its easier to hear whilst windows are up Turbo inter-cooler pipe would be my best guess as the Turbo only starts getting up to speed above 1500 rpmon a Frontera TDi I had it had a tiny split in the pipe (you had to look hard to see it, take it off and give it a good wash in soapy water) and that sounded like a tornado when you started to crank the beast, like yours nothing on tick over or revving it at the stop but as you pulled off WOOSH !!! A quick fix with super-glue and electrical tape and it was really quiet (it was leaking from day 1) and held till I could get a replacement pipe as it had stress cracks all over !! Edited October 10, 2011 by Amarok Quote
zorgman Posted October 14, 2011 Report Posted October 14, 2011 as we cant see car best is to examine all pipes as thats where its coming from. So its down to you im afraid to find it Quote
postiepat Posted October 15, 2011 Author Report Posted October 15, 2011 Ive had the car on the ramps listening underneath but cant hear it whilst the car is stationary, checked intercooler pipes and all seems ok, im wandering if the intercooler itself is damaged as the car was in front end smash a few months back and although its been repaired the cars made this noise since then Quote
postiepat Posted October 19, 2011 Author Report Posted October 19, 2011 Checked all intercooler pipes and cant find the leak :( Quote
seatkid Posted October 19, 2011 Report Posted October 19, 2011 I think its quite normal to hear a hiss when accellerating hard between about 1900-2500rpm. This I think is just the turbo pumping at max volume. If you had a significant leak anywhere in the boost pipework you would invariably suffer from "limp home" episodes. I think also partly blocked EGR valves can hiss quite a bit. Quote
postiepat Posted October 19, 2011 Author Report Posted October 19, 2011 Ive ordered a boost leak tester to try to pinpoint the leak, not sure how to use it though :( Quote
postiepat Posted October 23, 2011 Author Report Posted October 23, 2011 have used the boost leak tester connecting it to the turbo but there are no leaks on that side of things so i,m now looking at the air intake, i,ve noticed the airbox lid doesn,t seem to be closed down firmly on the filter even though the screws are all tight, is it possible this could be warped somehow ? Quote
Mirez Posted October 23, 2011 Report Posted October 23, 2011 have used the boost leak tester connecting it to the turbo but there are no leaks on that side of things so i,m now looking at the air intake, i,ve noticed the airbox lid doesn,t seem to be closed down firmly on the filter even though the screws are all tight, is it possible this could be warped somehow ? It hooks on the left, screws on the right so make sure its hooked it fully. I can't see it warping myself as its thick plastic but its possible the screw threads have gone as they are only plastic and if over-tightened will strip. Quote
postiepat Posted November 14, 2011 Author Report Posted November 14, 2011 (edited) it turned out to be the air filter intake pipe that was missing behind the wheel arch liner causing the noise :) Edited November 14, 2011 by postiepat Quote
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