R33 Gtst Rb25Det Surging Help!

[budskin1]

hi everyone i am having a problem atm with my r33 gtst rb25det it has been a problem since i have owned the car even after i have swapped motors.

when warm or cold as coming onto wot the car surges from 2000rpm to about 5000rpm then after that it completely frees up.

its a bad surge and if i hold wot when it surges it back fires and sounds like there's a front fire ?

standard boost well standard setup,

has front mount.

i have got new plugs gapped at .8

and have swapped coil packs no difference at all

timing is at 15 degres and the more timing i give better it gets

also has a new walbro hp fuel pump cant remember what models was good for 300 hp tho.

but when car is running or fuel pump is primed the fuel line isnt hard hard i can push it half way in .

any ideas on what it is guys all help much appreciated ??? thanks for reading

[Ben C34]

Checking the hardness of the fuel line won't tell you anything, that's what a fuel pressure gauge is for.

Obvious things to do are clean afm and check for boost leaks.

Aren't you the guy with the rb20 turbo that glows red all the time, drives hard everywhere and just got car out of impound?

[GTSBoy]

but when car is running or fuel pump is primed the fuel line isnt hard hard i can push it half way in .

If you are at all concerned about low fuel pressure......then why not either install a fuel pressure gauge into the line or take it to a mechanic who can so you can see if there's a problem or not?

[Badgaz]

well...like the others have said...but in the equation of information that you've provided i'd be looking at your fuel pressure regulator.

[budskin1]

okay guys fuel pressure is at 40psi when primed and while i rev it it climbs to 45 there are no boost leaks at all. and the more i advance the timing better it gets ?

[budskin1]

Checking the hardness of the fuel line won't tell you anything, that's what a fuel pressure gauge is for.

Obvious things to do are clean afm and check for boost leaks.

yes that is me. i have started to drive normal now thanks to the new hoon laws i just want car to run good thats all

Aren't you the guy with the rb20 turbo that glows red all the time, drives hard everywhere and just got car out of impound?

y

[89CAL]

Are you sure you checked the timing right? Did it with a plug lead between cyl 1 spark plug and coilpack and then put a timing light on

Sounds like timing to me, especially if it gets better as you advance it

Is the CAS dead?

[budskin1]

yeah timing was done by a mechanic today. i have a feeling its running really rich possible afm maybe ?

[Ben C34]

Of course I would agree it could possibly be the afm as I already suggested that.

[budskin1]

Of course I would agree it could possibly be the afm as I already suggested that.

and also i took the rod off the actuator and its runs smooth as f**k obviously no boost ? so what do u suggest there? i have put a afm and borrowed a cas still the same ?

[Ben C34]

Boost leak. As I already suggested also.

[budskin1]

it was a massive boost leak hose was completely gone aha still slight hesitation sorting i now hopefully

[Ben C34]

I win.

Took two tries to convince you though.

Glad you sorted it.

Edited May 20, 2014 by Ben C34