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Serious Problem With R33 Gtst

l0WRB

By l0WRB,
in Engines & Forced Induction

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l0WRB Mentor

l0WRB

Posted
Posted (edited)

posting on behalf of a friends r33 which has serious problem

mods

rb25det series 1

splitfire coilpacks

cooler

exhaust

10psi

stock ecu

items we have tried and replaced with items off my car.

afm

3 different fuel pumps, now running stock rb25 fuel pump

coil pack igniter

cas

fuel regulator

basically im gonna try best describe what the car does.

sometimes the car will drive fine for half a day or all day then all of a sudden the car will start surging just while driving along at 60kmph or 100kmph

this is when the fun begins, once the car starts surging it will basically just cut the ignition and u have to put ur foot flat to the floor to keep the engine going, thing is the car doesnt rev or go anywhere with it flat

to the floor, u can hear the turbo spooling and the bov goes off a bit but the motor isnt reving or accelerating and thats flat to the floor for about 20-30secs, and if u take ur foot off the accelerator the car will die

and u have to roll over side of the road and kick it over 3-4 times before it will go again.

the fella has a powerfc there aswell that he has tried plugging in and using on base map but it does the exact same thing.

does anyone have any ideas? we r out of ideas.

have tried replacing the above items but nothing has fixed it.

Edited by l0WRB
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l0WRB Mentor

l0WRB

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  • Author
Posted

well the car u have to hold the accelerator flat to the floor to keep the motor from stalling and u can hear the turbo spooling still but the car doesnt accelerate or go anywhere like uve got it in neutral, and if you just let your foot of the accelrator the car will die and wont start again until u pull over and kick it over 3-4 times.

l0WRB Mentor

l0WRB

Posted
  • Author
Posted (edited)

fuel filter has been replaced, plugs has been replaced, vacum leaks have been checked all clamps.

havnt checked for bad earth or anything? only thing i cant think of that is earthed is ya igniter pack?

hmmm pretty sure its all bolted on near towards coilpack no6

its really fkn hard 2 guess wot it is though

the car starts and runs perfect and then all of a sudden it will just do this out of the blue

wether u flog or baby the car.

Edited by l0WRB
RBwhatever Veteran

RBwhatever

Posted
Posted

So you've checked all the cooler piping and joins?

When my pipes partially blew off it wouldn't rev past 4grand, wouldn't make full boost obviously but was still spooling, it was just a massive air leak that would only open up under pressure. Off boost it drove fine. Made the car run pretty crap though under boost.

....ummmm blocked cat maybe?

l0WRB Mentor

l0WRB

Posted
  • Author
Posted (edited)

yeah its not a vacum leak or join

the car WONT accelerate or make any boost, but u can hear the turbo spooling as u hold ur foot flat to the floor for 20-30 secs.

car doesnt DO ANYTHING at all cept roll along, its messed up.

car is running gutted cat. hmmm

Edited by l0WRB
Al Grand Master

Al

Posted
Posted

If the car is lowered remove the front right wheel, then the guard cover, and check to see if the loom as been damaged by the wheel itself. I have seen lowered cars rub through the looms and create massive shorts and problems. One even caught fire and the loom had to be replaced.

Is it more likely to happen in the wet, hot days, after X amount of driving, on rough roads, etc.

Also make sure you carefully check all the wiring, especially in the engine bay.

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