HELP PLZ!!!! Auto r33 stalls with minor throttle

[Tigger]

This has got me real worried! I hope someone can help me with this problem!

I have:

Automatic s2 r33

pod w/o cai

3.5" cat back exhaust

9psi

Driving on the way home today i noticed that my idle was doing something funny. Normally it would sit at the 600 or 700 rpm mark and not jump around but today it would rhythmically jump from 550 to 700 rpm and the engine would sound different... sortof like when you put some burden on the electricals (windows or moving the steering wheel). And when i push the accel down from the lights, at the start for a split second it feels like the engine is choking and about to stall but the revs pick up and off i go.

So i got home and in the driveway i wanted to test out if i could actually make it stall since it sounds like it was going to...

The revs are bouncing around again, and when i apply the slightest bit of pressure on the accel and keep it there, the revs drop to zero and the engine stalls. But if i apply the slightest bit more pressure, the rev pick up and its all fine and dandy. Its actually rather difficult to make the engine stall since i have to maintain the exact amount of pressure but it still bothers me that the engine sounds like its about to choke and stall. A couple of times i actually had the engine falling to about 50 (fifty) rpm and be able to pick up the revs again without the engine stalling.

Can someone please tell me what the problem is? I've noticed it doing something similar before but never as serious as it was just now. I have a suspicion it *might* be something sitting in my fuel tank because it tends to happen when im running fairly low on fuel. But i filled up on the way home and it still did it in the driveway! ArGH! Maybe i should wait for the fuel to settle? I dunno???

Anyway... somebody please shed some light into what the problem may be :ghost:

[strutto]

Could be your TPS... Might be worth doing a search to see how to adjust it...

Just a thought...

[Fly_With_Sky]

yeh do a search as it could be somehting like a dirty afm to the idle control valve thingy malfunctioning. there is a heap of info on it as i have recently searched some of it myself.

Just a quick question, do you get compressor surge when taking you foot off the acclerator as my r33 auto started to do what you described sometimes as well. If your turbo is going su tu tu tu then my theory is that the afm thinks there is more air than there really so ecu dumps more fuel and car stalls sometiomes because of it.

[Tigger]

I just got back after i took her for a drive and theres nothing wrong!

Now im pretty sure there must be some bad crud sitting in the fuel tank that stuffs around with the engine when im running low on fuel.

How do i go about flushing the fuel tank?

[Slide]

It is very rare for a car problem to fix itself

it will probably come back worse

if there was dirt in the fuel tank the fuel filter would have stopped the majority of it

my car keeps killing afm's and is also an auto doing exactly the same as yours.

as soon as it happens again take it to an auto electrician to be safe.

if your prob is the same as mine it will detonate really easily on high boost when the prob gets worse.

Be very careful....have it checked out in my opinion

[32vspecII]

when my old car hunted for idle it was the tps

but check/clean your afm anyway

[Nizmo]

my car does that on and off. Stalling when low revs - if you creep forward or in reverse if you creep back - sometimes when your sitting at the lights the revs will just start gonig spastic and it will cut out - these days when the revs start gonig spastic i slip it into neutral and its fine. Its just occasionally - have no idea whats wrong - i just put it down to my car being female therefore tempremental haha

[Fly_With_Sky]

yeha putting it in neutral takes the strain of the engine so thats why its all good there.

When i take my car for a service and little bit of modifying very soon i will get my mechanic to look into why my car sometimes feels like it will stall and every now and then, and fix the problem for good.