MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: pd9264 on May 05, 2012, 10:08:51 am

Title: i think iv got a boost leak
Post by: pd9264 on May 05, 2012, 10:08:51 am

recently i had my car stage 2+ mapped. its a gti k03. anyway i thought i might have a boost leak so today i fitted a boost gauge. the car peaks at 23psi and continuasly drops down to 10psi buy the time i hit 5500rpm. is this normal or have i got a leak. its not my dv as i have a forge one and have just serviced it with a new yellow spring and a service kit from forge. anyhelp would be great. cheers paul

Title: Re: i think iv got a boost leak
Post by: ktlstar on May 05, 2012, 10:12:20 am

Yup looks like you do have a leak, It should maintain around 1.5bar then drop slightly around 1.3 -(20psi)- 1.4 possible 1.2bar but not under 1bar. (14.5psi).

Anyone local to do data logging ?

Title: Re: i think iv got a boost leak
Post by: Thor on May 05, 2012, 10:26:52 am

If you check the VCDS register, someone local to you might be able to do some logging for you.

VCDS register
http://www.mk5golfgti.co.uk/forum/index.php/topic,120.0.html (http://www.mk5golfgti.co.uk/forum/index.php/topic,120.0.html)
 :happy2:

Title: Re: i think iv got a boost leak
Post by: pd9264 on May 05, 2012, 11:39:22 am

i only had it remapped 3 weeks ago. they must of logged the car the when they put the revo on it. i might give them a call

Title: Re: i think iv got a boost leak
Post by: ktlstar on May 05, 2012, 11:49:01 am

Iv heard Forge items leak, especially if they install the wrong spring ?!?

A simple data logging of the boost pressure will tell you if you have a leak!

Title: Re: i think iv got a boost leak
Post by: TrickGTI on May 05, 2012, 08:24:11 pm

you should be able to hear it under acceleration if its loosing that much through a hose or intercooler

Title: Re: i think iv got a boost leak
Post by: pd9264 on May 05, 2012, 09:21:08 pm

im gona do a pressure test on it tomorrow so i will hopefully find the leak. i hope i find it.

Title: Re: i think iv got a boost leak
Post by: pd9264 on May 06, 2012, 04:29:01 pm

done a boost leak test today. found 4 leaks. huge leak on intercooler coupling, one on my bsh pcv fix, one on my maf, and one on a little pipe next to the pcv. i also found one on my rocker cover gasket. should i replace the gasket.
  now the car still peaks at 23psi and holds bout 17-18psi till bout 5500rpm then drops down to about 12psi. does that sound normal or should it hold 18psi to redline.

also after i done my boost leak test and started the car up it smoked loads. i didnt block the rear pcv off though so thats proberly why. hope it hasnt done any damage. :stupid:

Title: Re: i think iv got a boost leak
Post by: pd9264 on May 06, 2012, 04:33:09 pm

also my forge dv is loads quiter.