MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Technical Workshop => Topic started by: Broonie boy on April 04, 2010, 08:59:43 pm

Title: Boost Problem
Post by: Broonie boy on April 04, 2010, 08:59:43 pm

Guys please help, Ive had a revo stage 1 on my gti since xmas now and never had any bother till today! It doesnt feel like its boosting near the same as it was the day i got it mapped, i drive the car everyday and havent noticed this until today. Also it used to be quite loud when u let of the throttle but again today ive noticed its alot quieter, could this be something todo with a diverter valve or summit? ive read that the o.e ones arent not really fit for a car with a remap?

Title: Re: Boost Problem
Post by: Nickyboy on April 04, 2010, 09:30:10 pm

search for `diverter valve` mate, I was thinking the same as yourself a few days ago.

Title: Re: Boost Problem
Post by: Broonie boy on April 04, 2010, 09:35:47 pm

Ok cheers nicky. i was having a look on awesome gti there. There have an uprated o.e one or you can a forge one. ive mailed them to see what they think anyway. Are you having similar problems?

Title: Re: Boost Problem
Post by: Nickyboy on April 04, 2010, 09:39:36 pm

I have a switchable GIAC flashloader and when in 305bhp mode the power is intermittent, like the car decides when to pull, not me.

Stock mode is better but it still feels a bit moody, so I bought the new revision D diverter valve as I hear the original version has a tendency to split under increased boost.

If it's not that it's the clutch  :sad1:

Title: Re: Boost Problem
Post by: Broonie boy on April 04, 2010, 09:44:59 pm

funny ya say that, cause today when in 5th gear an it hit 3k revs it shoots upto 4k revs then back down. similar to clutch slip! But only seemed todo it at them revs!! Strange!

Title: Re: Boost Problem
Post by: Nickyboy on April 04, 2010, 09:46:40 pm

Dunno mate, only had mine for 8 days  :signLOL:

Title: Re: Boost Problem
Post by: Broonie boy on April 11, 2010, 09:56:43 am

Thats it sorted, fitted a rev d - diverter valve yesterday and its better than it was before.  :jumpmove:

Title: Re: Boost Problem
Post by: Nickyboy on April 11, 2010, 10:50:56 am

 :jumpmove:

Did you fit it yourself? Any pointers?

Title: Re: Boost Problem
Post by: Broonie boy on April 13, 2010, 04:51:49 pm

yeh fitted myself, wasnt too much hassle, i took the drivers side wheel off gave me a bit more room to get in. The cap screws arent the easiest to get into thou!   :drinking: