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R31 Pintara => R31 general tech & queries => Topic started by: wombat on Jul 6, 2008, 03:53PM

Title: engine shut off during full acceleration
Post by: wombat on Jul 6, 2008, 03:53PM

Strangest thing happened last night... I was reacquainting myself with Old George and have it full throttle up the road and Nothing! backed off, and it picked up and ran through to 4.5-5k RPM

Tried again, full throttle to 4k and nothing, returned to idle until i backed off the throttle.

I'm thinking computer or secondary spark plugs. Any ideas?

Title: Re: engine shut off during full acceleration
Post by: h4inf on Jul 8, 2008, 02:34AM

That's odd!

So when your foot was flat to the floor, the engine rpm's dropped to about 1000?

Did you hear any popping like unburnt fuel making it to the exhaust... how long had the car been running when this happened?

Just to clarify:
If you start from a stop and put your foot flat, the rpm's pick up but when it hits 4k, the revs drop from there, or it gets stuck about 4k?

I had a problem which was in one distributor I got from wreckers where it simply would not accelerate past 4k rpm. It was something in the base of the distributor or the electronics part of it. I swapped the top bits to my other one and they worked ok..

As far as I know, only 1 set of spark plugs should be running when you are at full throttle (or full load) - the difference in timing between firing multiple sets of plugs is too rough at high rpm and would cause the engine to vibrate, and as far as I know the multiple plug banks run entirely based on the throttle position sensor and the temparature sensor - controlled by the ecu. It doesn't sound like that sort of issue to me.

I would say distributor or it could be the computer as you suggest... does it have any error codes?

Title: Re: engine shut off during full acceleration
Post by: wombat on Jul 8, 2008, 09:18AM

haven't checked the error codes - i'll get around to that.

Engine was warmed up - full throttle to 4K then it behaved as if the throttle wasn't even pushed. Kept throttle on full and coasted down to idle speed.

Title: Re: engine shut off during full acceleration
Post by: wicked on Jul 8, 2008, 10:00AM

Error code would be a good start. :)

Title: Re: engine shut off during full acceleration
Post by: Jono on Jul 16, 2008, 10:15PM

I had this problem a while back, one of the main ignition leads had fallen out.

Title: Re: engine shut off during full acceleration
Post by: wombat on Sep 23, 2008, 08:31PM

well, I've fixed it. Sort of.

I wound the accelerator pedal closer to the floor - can't get full pedal, no cutout.