vacuum leak detection
05-12-2004, 12:35 PM
#1
Track Day
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Location: belgium
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vacuum leak detection
Hi guy's,
A question ... any suggestions how to detect a vacuum leak
I have the strange "whistling" sound when i push the pedal.
Idle get's erratic ... etc etc ...
Many tnx
Porschy greetz from Belgium
Dirk
A question ... any suggestions how to detect a vacuum leak
I have the strange "whistling" sound when i push the pedal.
Idle get's erratic ... etc etc ...
Many tnx
Porschy greetz from Belgium
Dirk
05-12-2004, 06:09 PM
#2
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Join Date: Oct 2003
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hehehe !!! 
chased one round my golf engine-bay for 2 weeks a while ago .
it sounded like it came from the back , but when you put your head there to listen , it sounded like it was coming from the left , when you put your head there it sounded like it was coming from the right . when you put your head there......... etc. etc.
first i ran my hand over all the hoses , rubber sleeves , jubilee clips etc. while a mate reved the engine ............... nothing .
then i tried the usual trick of spraying "easy start" , it didnt work !!! i was spraying everywhere apart from where i eventually found it
easy start gives the engine a boost , so , when you spray it over inlet side of engine , it gets sucked through the leak and the revs rise , hey presto !!
in the end , i used a full tin of easy start , then tried with wd40 .
basically i got fed-up and sprayed all the top-end of the golf . wd40 rand down and settled in a place i didnt think to spray !!! (where inlet manifold bolts to head )
rather than find the leak for me , the oil collected and plugged the leak !!
(not permanently , just long enough for me to figure out what had happened)
chased one round my golf engine-bay for 2 weeks a while ago .
it sounded like it came from the back , but when you put your head there to listen , it sounded like it was coming from the left , when you put your head there it sounded like it was coming from the right . when you put your head there......... etc. etc.
first i ran my hand over all the hoses , rubber sleeves , jubilee clips etc. while a mate reved the engine ............... nothing .
then i tried the usual trick of spraying "easy start" , it didnt work !!! i was spraying everywhere apart from where i eventually found it
easy start gives the engine a boost , so , when you spray it over inlet side of engine , it gets sucked through the leak and the revs rise , hey presto !!
in the end , i used a full tin of easy start , then tried with wd40 .
basically i got fed-up and sprayed all the top-end of the golf . wd40 rand down and settled in a place i didnt think to spray !!! (where inlet manifold bolts to head )
rather than find the leak for me , the oil collected and plugged the leak !!
(not permanently , just long enough for me to figure out what had happened)
05-12-2004, 08:40 PM
#3
Technical Specialist
Rennlist
Lifetime Member
Rennlist
Lifetime Member
I've used a hand held propane tank, turning on the fuel, but not igniting it! If you have any air leakage anywhere on the air/fuel intake, the propane will cause the revs to increase. Again, sorry if it's obvious, but you use the propane tank without lighting it!
