Jan_M

A friend has a GT3. The car has been stashed away during our swedish winter. Took it out for the first time today. Ran it for 1 hour.
Everything works except a dip/hesitation during full throttle acceleration, around 4k revs. If throttle is increased more "gently", the engine will pick up revs as it should.

What could it be? Spark plus gone bad? Some "goo" clogging the injection? Something else??

WULF

Was it a fresh tank of fuel? Sounds like fuel starvation. Should get his dealer/tuner to do a diagnostics check. If the engine management is OK he will probably need run through the fuel delivery to isolate the problem. But I could be wrong!

Z06

I think i noticed the same thing today at the track..after shifts

RevUrGT3

I asked the head mechanic @ my local dealer the other day, since I had noticed a slight hesitation about 3500 RPMs too and he mentioned that it is normal and that the engine is breathing better... sorry, I forgot the technical blurb...

WULF

I'd be interested in the reason when you get another chance to ask him.

Mr. C4

Had the same on my 2000 GT3CS, turned out to be the hall sensors.

Ciao,

Johannes E.

Jan_M

Fresh gas and lots of throttle "massage" did the trick. 911 can heal themselves through hard driving, and since today it is a fact!...:-)

jlasuncion

Johannes, what are hall sensors? I'm having hesitation on my 2000 mk1 and will try 'self healing' a bit today, if it doesn't work then would like to narrow down possibilities. Thanks.

jlasuncion

Please disregard...just cleaned MAF and put in new air filter and that car runs great now, another proof the car is organic/alive as it healed itself it was hesitating a bit during earlier part but got better the more I gassed it...love it!