R32 Gts-t Problem Losing Power

[r32gtstJ]

Hi all, I was a member about 6 years ago and now I got myself a fresh import gtst so I'm back in the game.

Just received my 32 off the boat and was so excited to have another 32 in my life but... my joy was short lived.

After a initial drive, i noticed the car was losing power at random points and when i put the foot down it suddenly goes again and loses power again.

This was the first problem. second is when I had to stop behind another vehicle, at low rpm even with my foot down on the clutch, the car shut down completely so I had to quickly restart it.

I initially drove home and after the first 10 mins of problems, it behaved OK even in the evening when I took it out again and gave it a good run (That's what I thought it needed after being stationary fir a while)

This morning, I gave my new baby a wash and a wax and started the car to warm it up and went inside the house, 5 mins later I went out again because it was too quiet, but to my surprise and horror, the car shut down by itself....

I attempted to start it and it did, for about 5 seconds and RPM dropped and died. this repeated about 3 times before I left it alone for about 10 mins before attempting it again.

10 mins later it started after I put my foot down and it somehow managed to stay alive. I went for a drive and just around the corner when I stopped at an intersection, it died again.

My first skyline had a similar issue, from memory it was the Air Flow Meter.

I was reading the posts and found some similar cases but wanted your inputs in diagnosing what it could be.

The car is a 1993 R32 GTST done 67km Japanese auction grade 4.

its got a ARC super induction box, aftermarket intercooler, and a non vent to air bov.

My first guess is either the AFM or the TPS or coilpack. since it sometimes takes a bit of crank to start her up.

Please let me know what you think.

[blind_elk]

... started the car to warm it up and went inside the house ...

Please don't do that. It wastes fuel and causes damage to the engine (most engine wear occurs during warm up). Also makes the car vulnerable to theft, as one Porsche owner in Canberra can attest!

Back to your problem - get the injectors cleaned, new spark plugs, change oil / filter.

[Hadouken]

Boost leak

Afm

Cas

[Sinista32]

Fuel pump, pressure, filter

[Ben C34]

Aac, timing,

[r32gtstJ]

Cheers for all the input,

The car went for a full service changing oil, filter yesterday

[r32gtstJ]

So could be spark plugs, afm,

What is AAC? Timing= belt?

Fuel pump and pressure seems to be ok, but fuel filter I'm not sure about...

And boost leak? The car was running fine after the initial fit it had so I assumed was all good but I was wrong... Seems to boost well when it's working so maybe no leak,,

And finally.. Never knew warming up the car can do damage..... Is this really the case? I thought it was the opposite

[Hadouken]

Excessive idling can cause the piston seals to leak. Besides, by that time you will be rebuilding the motor.

[Sinista32]

It's not your issue but

Idle no more than 30 seconds. Drive pretty much off boost until near operating temp is reached.

When the oil temp gauge starts to move you should be good.

[r32gtstJ]

Hmmm ok never knew idling to warm up was a bad idea, well you learn something new everyday. Thanks for that

[r32gtstJ]

Took it to the workshop,

Scanner found the fault code to be the afm. Changed that and she's like new

[Hadouken]

Nailed it.

[Sinista32]

#Ur2gud

[r32gtstJ]

Well done and thank you

[r32gtstJ]

One more question for you then, the car sometimes starts up well, but sometimes needs a good crank + tap on the pedal to start up. Is this just old spark plugs or coilpack or a battery that may need replacing soon?

[Hadouken]

bad cold start map haha

[r32gtstJ]

Sorry I don't understand, manifold pressure?

[Hadouken]

What I mean is that it could be tune related. Or any number of things.

[r32gtstJ]

ok, when i talked to the workshop, the car has a standard ecu and has never been tuned in the past from what they can see.

so that's probably out... but by other things, it means something ignition related no?

like spark plugs or coil pack etc?

[Jordy32]

Give the cold start and IACV valves a clean, helped with mine