Rb25 Problems

[wellzy]

hey everyone....

i have just recently finishd putting a RB25 into my 32 and its all running sweet except for.... sumfin which is giving me the shits

As i come on to boost and get up to about 4rpm or so the exhaust starts popping and backfiring.... simliar to as if i had a REVLIMITER "which i dont" and when this is happening im loosing power and acceleration...

ATM it only has cooler, exhaust and fuel pump "as i am a lil low on funds atm "

and its running stock boost.

does anyone what my problem may be... iv been told its the coilpacks and sum ppl also said its the fuel pump....

but i want more opinions b4 i do anyfin. Your help would be much appreciated

thanks

josh

[bubba]

Hesitation/stuttering would make me think fuel pump.

Popping and backfiring sounds like spark breaking down. I would start checking ignition items, plugs, coils, coil harness etc.

Is it s1 or s2 25? s1 will have a seperate igniter like 20/26, that could also be stuffed.

Does it do it everytime without fail? or only when hot? or just randomly intermittent?

[dazman]

And enter the noob................

hows it goin, new to this, so be gentle..... he he he...

if your running standard boost, and you've added the new exhaust and front mount etc, you could be experiencing boost creap which is comon.. i found my r33 would sputter and fart at higher revs though until i put in a fuel cut defender and re gapped the plugs..

the FCD helped a fair bit but when i regapped the pluggs that made a world of difference..

the re-gapping of the plugs is probably the cheapest spot to start... i'd then suggest a run on a dyno after that and maybe fuel filter as well to determine the problem properly.. but i do understand that cost presious precious cash monies to do this.....

any ways, couple of extra ideas for ya... hope it works out and the problem gets solved...

nothing worse than chasing a bug...

[teejay]

If you have already swapped fuel pump, why would it be the fuel pump?

Highly unlikely.

Id say coil packs or AFM.

[Dani Boi]

Popping and backfiring sounds like spark breaking down. I would start checking ignition items, plugs, coils, coil harness etc.

+1 Although when I had the problem that is basically the same as wellzys I was running about 13psi but I dont think that should really make a difference. Cheapest solution to, about $3 per copper plug.

[Dsturbd]

Go for a set of splitfires n new plugs

Why new shit comes with WARRANTY

If you have already swapped fuel pump, why would it be the fuel pump?

Highly unlikely.

Id say coil packs or AFM.

[32vspecII]

If you have already swapped fuel pump, why would it be the fuel pump?

Highly unlikely.

Id say coil packs or AFM.

[R DIRTY 3]

^^^ Alistair, sell the man some coil packs and fix his problem

[autoworx]

why didnt i think of that

[wellzy]

hey guys

just got bak from ovaboost in malaga.... and i was having a chat to mick and getting my powrfc fitted and tuned on thursday... but my 25 probems which i was having has wierdly stopped... after mick unplugged a brown colourd plugged which is located at the back of the throtle body (not literally on the back of the throttle body... just located behind it)

he pulled that plug out because the engine was idleing to high... and dumbass me didnt actually ask him what he pulled out

so the question i ask is does anyone know what this plug may be and why would it have stopd my first problem???

sorry to be a pain in the arse but i just need more info/opinions on this anyoing problem

thanks

[wellzy]

YES!!!!

problem resolved.... all it F**KN was... was just a crackd spark plug. i could believe it. im glad i didnt go out and buy coilpacks

f*k... im so relieved. now powerfc in and tune and make 260HP @13psi just with cooler and xhaust and fuelpump stocked cause iv got soooo much more to cross off the list which i will be going in

thanks for every1s help

[NA_Goodness]

Good to hear mate, the simplest things always cause the most grief... and yet finding them is the problem!

What colour is you car man? I work near Ovaboost, and I drive past it 2-3 times a day on test drives. I've probably seen it!

[wellzy]

Good to hear mate, the simplest things always cause the most grief... and yet finding them is the problem!

What colour is you car man? I work near Ovaboost, and I drive past it 2-3 times a day on test drives. I've probably seen it!

yeh just gald thats all over and i cant spend my money on what i have planned.... my 32 is silver... its the first time iv been to ovaboost in awhile but ill be dealing with them so much more when putting in my plenum and turbo n stuff because they are so helpful and reliable...

cant wait

[NA_Goodness]

I'm pretty sure I saw that there.