Help Needed - R33 Gtst ----high Rpm Popping

[Eav00l]

Hi all, as some of you may know i am selling my car due to an knee injury i did snowboarding, the other week i got in my car and noticed when i put my foot flat to the floor at around 5000rpm the car would cough and splatter (almost like it was hitting rev limiter at 5000 not 7000 {but the engine kept reviing to 7000rpm while coughing).

I took it to a mate and he said it could be the AFM being dirty, i got some auto elec contact cleaner and cleaned the contacts... this did not work.

As long as the pedal is not flat to the floor it will act normally but as soon as it hit the floor and 5000rpm it starts playing up.

I was thinking it may be a turbo problem.... is there a way to check wihout pulling it off the car?

Car is as follows

1993 - ECR33. GTST

5 Speed Manual

Front Mount Intercooler

Cold Air Intake

Pod Air Filter

3.5in Exhaust

Turbosmart BOV

It is currently running about 7psi although i did not have a boost guage connected to the vacuum hose for about 3 weeks as i was making a custom mould for it, then when i connected it back up it was reading about 7psi instead of 10psi... same guage same everything just different location... i think the engine problem may have happened around the same time the boodt guage got connected back up....

As the car is still for sale any help would be gratefully accepted.

Thank you....

Craig

[Blitz]

Check your coil packs.

[Eav00l]

coil packs..... in the middle of the engine.....

What am i checking? / how do i check them?

[Eav00l]

I also replaced the spark plugs, but this did not help at all.

[psybic]

I'm sure Sydney Kid will post soon and clear this up if its wrong.

I have exactly the same problem so have been doing some searching. Seems that R33 GTSt's run extra rich. The problem we could we be having is its running so rich, it splutters and carries on.

As soon as you wack a pod on their, its going to see alot more air, the ecu over compensates and rich and retards like crazy.

Everyone always says coil packs first up, for everything... check them for sure, but I'll put money on it NOT being them.

Check them by pulling them out and see if they look shit for starters ( like cracks or anything ). Then get a work shop manual and work out which pin to the base should have what resistance. I did this ages ago when I was assured I needed to invest in split fires, turned out it wasn't the coil packs at all.

To fix mine, I intend ( when I get paid this month ), to check the afr's and see just how rich it runs on a dyno.

Will check things like O2 sensor, TPS ( as it seems to always be fueling up when I back off and wants to just cruise rather than decel ), then to resolve the problem, either an SAFC or if I feel super keen, full after market ecu so the timing can be controlled aswell as fuel. ( LT12 is what I'm thinking, sorry to stray from powerfc culture... don't hate me)

[Steve]

I would be a bit concerned that the boost is reading lower - are you sure you dont have a leak somewhere?

factory boost with and exhaust should be higher than 7psi

[MR331307]

I would be a bit concerned that the boost is reading lower - are you sure you dont have a leak somewhere?

factory boost with and exhaust should be higher than 7psi

What boost u running or what does it say

what spark plugs did u use and what gaps are u running

[Guilt-Toy]

We have not seen Sydney Kid for a while.. I think he got offended with everyone doubting what he says.....

Gap your plugs to .7 or .8... that should fix it.

[paulr33]

he is around

just doesnt answer as much (at least i think anyway)

given majority of the questions in here have been answered before and a quick search would give u the better answers in the past

[Meek34]

I have exactly the same problem with my R34 GTT, so please post solution if you find one!!