R33 S2/ No Top End Power

[TroyBoy33]

Hi all,

I have a 1996 R33 gtst, resently had a problem arure,

I'll try to describe it..

The car hits boost starts to pull then at higher revs sounds like it is goin but its not

pulling anywere near how it should..

The car has a boost tap but only running around 8psi atm.. fmic and cat back exhaust..

I tryed running a straight line just from the actator straight to the cooler pipe (same result) i then tryed swaping the a.f.m (still same) the car was serviced 2k ago, im quite sure all the clamps on the cooler are tite, i replaced the spark plugs yestarday and all coil packs seem to be in good order.. I hav also changed the b.o.v thinking that it could be leaking .. (still same)

So im quite confused as to wat the problem could be../???

I know its real hard to diagnose with out seeing the car,

but just thought id ask the question

Thanx for any advice you can offer

[lachlanw]

ever done a fuel filter or pump ? or checked timing?

[BoyWhoCriedWolf]

Id put a nut on bad plugs/incorrect gap or dodgy coils.

Check the coils first.

[TroyBoy33]

Yea i changed the fule filter 2k ago as well, and the car was running like it a couple days ago i changed and plugs and the coils seem to be fine not cracked or anything and its still running the same..??

also it seams just b4 in goes to hit boost it hesatates a bit, and again in higher revs more so under aggresive acceleration...???

[BoyWhoCriedWolf]

What did you gap the plugs to?

[TroyBoy33]

Umm the plugs are ...... the bloke from aout barn recons there perfect for the rb alredy no need to re-gap them..?? im gunna change all the coils today as well c how we go..??

Another question iz there any advantage to moving the a.f.m to the cooler piping and having just a straight pipe of the frount of the turbo (all with starndard computer) ...???

[TroyBoy33]

And just incase the gap iz wrong wat do u sugest the best gapping would b for my rb25det..??

Cheers guys!

[.:: GimpS-R34 ::.]

re-gap to 0.8mm... if weaker coils, higher powered cars, also considering age..

it's a laugh if your getting technical advice from auto barn.. i would look at one of the sponsors on here to get your equipment.. (also for supporting the people that support you)

I recommend Kudos on here as he checked all info and gave reasons as to why choose different items... instead of just reading what the manual states..

Edited May 17, 2010 by .:: GimpS-R34 ::.

[TroyBoy33]

well today i pulled the fuel pump out seems to be in good working order, changed the coil paks, changed the plugs coulpe of days ago (gapped at 0.6mm) changed the air flow meter, checked all cooler clamps. changed the b.o.v just in case it was leaking... still same resault after all that ....???

Really running outa ideas...

[Granthem]

Are you sure its not just the stocko turbo.

Every R33 runs out of top end with the stock turbo lol

[TroyBoy33]

Lol ahahah good point but im saying like no power dies in the ass bad! iv had a skyline 4 around 2 years i know how it was and how it should be lol.. i would say turbo yea but its not blowing any smoke and if u ease into it, it goes ok it when ur flat to the floor (to quike on the acceleratore) that it stuffs up..??