Gtr Boost Leak!?!? Ideas?

[DAN00H]

Hi All

Well. I'm scratching my head a bit over this one, my normally reliable and strong R32 GTR is having some major issues ATM.

After installing a bigger (ARC) I/C and HKS cam gears my car has developed some weird boost issue. I hardly drive this car, and after making the changes discoverd it had developed a nasty boost related (I think) issue.

It started up ok, but seemed a bit slow to bring the RPM up to the usual 1000rpm - took a few seconds, but I thought nothing of it seeing as it hadn't been driven in some time.

Anyhow, after warm up, I trundle out onto the road and find it seems reluctant to rev and didn't want to boost..... (this was about 1/4 throttle max!). after getting it up into the higher gears (80km/h) the BOV's start singing their own little song of open close, open close and constantly... no changes in throttle position...

Normally this thing makes a comfortable 280rwkw (GT2530's), so is not slow - but I'm a bit perplexed as to what has occured...

I have refitted the stock I/C - No change

Double checked the timing - 20deg (factory) - thinking of throwing the stock cam wheels back on, but I think it is highly unlikely this is the cause)

checked all the conections - all ok

Initially thought is was a boost leak, but none found

another thing I have noticed is that after going up the driveway (500m) onto the road (500m) and back with no more than 1/4 throttle the turbos seem to be VERY hot (the water boils in the water feed...)

Any ideas?

Only thing I can think of is perhaps something was in the outlet end tank and is not stuck in the plenum...?

Cheers

Dan

Edited May 27, 2006 by DAN00H

[danielson]

bokc off the vaccum hoses going to ur bovs. drive it and if it stil goes off intermittantly ur bov springs are f**ked

[double overhead sun visors]

Same thing happened to mine a while back. Now if I could just remember what the hell it was realted to, something simple though, like the wrong hose hooked up to EBC or intercooler hose leaking off boost & PowerFC overcompensating.

If the BOV is going off like a steam train it's the same thing I had & it would bunny hop. Sorry I can't be much more help but I know who can - call Jim (?) at SAS - Silverwater Automotive Service - he'll tell you straightaway. Like I said it's something fairly simple, I was speaking with him about this the other day.

[DAN00H]

Same thing happened to mine a while back. Now if I could just remember what the hell it was realted to, something simple though, like the wrong hose hooked up to EBC or intercooler hose leaking off boost & PowerFC overcompensating.

If the BOV is going off like a steam train it's the same thing I had & it would bunny hop. Sorry I can't be much more help but I know who can - call Jim (?) at SAS - Silverwater Automotive Service - he'll tell you straightaway. Like I said it's something fairly simple, I was speaking with him about this the other day.

Sounds similar - I'll be checking all my hoses today, has to be simple as it was fine before... (BOV's worked without issue before...)

Cheers

[DAN00H]

LOL - issue resolved, it was the belt out by one tooth on both the intake and exhaust cams...