displaying posts 1 to 8 of 8

Author Subject: Discovering Vacuum Leak
rallyestyle

Seasoned Pro

Location: London

Registered: 23 Jul 2003

Posts: 14,990

Status: Offline

Post #1
Afternoon chaps.

Whats the best way to discover a vacuum leak? Can of carb cleaner spraying around the vacuum lines?

Any other methods that are best for 6's / Rallyes?

Cheers

________________________________________

Just Drive It
Posted 8th May 2013 at 15:04
ryangti6

Seasoned Pro

Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #2
Can of carb cleaner will do the trick if your leak is letting the engine draw in air, the revs should change when you hit the right spot.

If its on the pipes other than taking them off and inspecting them, then blocking one end and seeing if you can suck through it I'm not sure how else you could check them.

What makes you think you have a vacuum problem?

________________________________________

Ryan
Posted 8th May 2013 at 16:13
rallyestyle

Seasoned Pro

Location: London

Registered: 23 Jul 2003

Posts: 14,990

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Post #3
I have a stuttering on idle/hesitation on acceleration issue. Have checked most things but although a visual inspection of the vacuum lines has not revealed anything i thought i best do a test of sorts before getting a diagnostics guy out

________________________________________

Just Drive It
Posted 9th May 2013 at 08:45
adam b

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Location: The Nam

Registered: 24 Jan 2006

Posts: 12,828

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Post #4
Map or throttle position sensors.

________________________________________

Nothing to see here
Posted 9th May 2013 at 10:46
rallyestyle

Seasoned Pro

Location: London

Registered: 23 Jul 2003

Posts: 14,990

Status: Offline

Post #5
adam b wrote:
Map or throttle position sensors.



Pretty sure i have tried both but no joy No

Can't remeber if the map i used was a new one or not though Unsure

________________________________________

Just Drive It
Posted 9th May 2013 at 13:29
ryangti6

Seasoned Pro

Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #6
The rallye I had for a short while was hesitating on small throttle openings but fine otherwise. It failed the mot idle test so I swapped the lambda which seemed to cure it.


________________________________________

Ryan
Posted 9th May 2013 at 13:56
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #7
It is most likely a lambda problem. Yes

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2013 at 14:27
rallyestyle

Seasoned Pro

Location: London

Registered: 23 Jul 2003

Posts: 14,990

Status: Offline

Post #8
stan_306gti6 wrote:
It is most likely a lambda problem. Yes


It happens with the lambda unplugged though so not so sure Unsure

I have a spare but i am dreading trying to get the old one off, seized on i reckon, talk about awkward Crazy

________________________________________

Just Drive It
Posted 10th May 2013 at 11:07

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