R33 Boost Problem

[jakez88]

i need some advice on whats happening to my car. only just bought my r33 maybe just over 2 months now and i've never really fanged it. i did it once and for some reason when i'm boosting it up (almost flooring it), after about 4,500revs there is a surge of power and boosts up more but then it starts to choke/stutter?

today i got my exhaust put in and decided to give it a good fang and the same thing happened. i would boost it up hard and all of a sudden after about 4,500revs there is a kick in the power and it boosts up more but then starts to stutter. as far as i can remember it happened in all gears from 1st to 3rd. i'll test it out tomorow again.

now i just want to know if this sounds like the ordinary stuffed coilpacks problem? or does it sound like something else? fuel pump?

[Scottydoo]

Maybe have a read through this thread mate? Not sure but might help:

http://www.skylinesaustralia.com/forums/St...rboost+fuel+cut

[Benzino33]

tape your coil packs up and have a go. use good electrical tape. only really need to do it around where they screw into the car. theres a thread about misfiring above 4500rpms,, i used to hav that problem and now it redlines with no problems

[sushiboi]

I have the same problem too ><

Usually happens in third gear though when i get around 5000rpm.

How can i fix this??

[ceejay77]

tape your coil packs up and have a go. use good electrical tape. only really need to do it around where they screw into the car. theres a thread about misfiring above 4500rpms,, i used to hav that problem and now it redlines with no problems

thanks for info will try taping the coils not sure how that would fix it but worth a try if it has fixed yours.

[Jmaac]

vvt switch point, change your plugs first or regap. if it continues to missfire at high rpm then buy some second hand coil packs and switch them in/out until it stops happening (or just buy some splitfires). tape wont work (poor insulator of heat)... possibly better than nothing

[ahh 33 s2]

the reason it boost harder after 4500 is coz its a standard dual stage boost solenoid they all boost harder after 4500, the stuttering and coffing is coil pack related. also search for a thread that over rides the second boost kick for full boost from go to wo.

[geraus]

Check your coil packs, Spark plugs....... Make sure there gapped right as well... 0.8mm

Try and use BCPR6ES 0.8mm

[jakez88]

^^shit didn't ahve a clue about that. i'm coming from owning 2 32s so have no idea. thanks heaps

someone show me this thread about getting full boost!

Edited May 19, 2009 by jakez88

[mosquitocoils]

As the previous poster mentioned, your car has a two-stage boost controller as a stock item. It regulates that boost will go up to 5psi at around 3000rpm, and then once you reach around 4500rpm upwards, the boost climbs to 7-8psi.

For reference's sake, I've seen mine get to about 7.5-8psi when I get close to redlining in 3rd gear coming onto the highway.

If you were to install a manual boost controller (like a turbosmart, or gfb as examples) this takes the place of the stock boost controller and sets a maximum boost as set by you when adjusting the new controller. Up to around 10psi is considered safe with stock internals and turbo.

Unfortunately I can't help with the misfire problem, but as others have stated have a look on these forums, I have seen a stickied thread relating to it.

[dezz]

stock boost will go up to about 9psi after 4500rpm with a full exhaust too...

[geraus]

Get a turbotech manual boost tee, there on ebay about 40$, They hold boost pretty good. Mine use to hold up to 10-12psi on stock turbo with full exhaust and front mount. Get that and when you connect it, dissconnect your stock boost solenoid.