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Old May 29, 2020 | 10:38 AM
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Default Twitchy Throttle

Hey guys,

Since My last refuel I have been experiencing a bit of a twitchy throttle response at low speed. Which is odd because this is something I actually loved about the car how it was smooth at low speed yet ripped if you gave it the beans. The last refuel was 94 octane at a local gas station (petro canada), could it be a batch of bad fuel? the car has 6000km with no performance mods. Just checking if anyone has had a similar experience here.

could it be:

bad fuel batch?
car finally opened up after 6k km?
PDK issue?
fuel pump?
throttle sensor?
am I simply going crazy from 3 months of confinement and overthinking everything?
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Old May 29, 2020 | 10:41 AM
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My guess would be bad fuel. Not many people driving, and the last fill-up you received may have been a bit stale. Keep toping up every 1/4 tank.
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Old May 29, 2020 | 10:45 AM
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Originally Posted by LexVan
My guess would be bad fuel. Not many people driving, and the last fill-up you received may have been a bit stale. Keep toping up every 1/4 tank.
yes that was my first thought, I'll top it off at a diff gas station today, see if it helps.
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Old May 29, 2020 | 12:34 PM
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Originally Posted by LexVan
My guess would be bad fuel. Not many people driving, and the last fill-up you received may have been a bit stale. Keep toping up every 1/4 tank.
Out of interest, how quickly does fuel degrade / go stale in a gas station environment?
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Old May 29, 2020 | 01:59 PM
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Modern fuels absorb water when they sit around. Much more so than in the past. That is what does it.
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Old May 29, 2020 | 05:11 PM
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Originally Posted by Carlo_Carrera
Modern fuels absorb water when they sit around. Much more so than in the past. That is what does it.
You're right. Ethanol in fuel absorbs moisture to form an azeotrope with water.
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Old May 29, 2020 | 05:15 PM
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put some Techron strong dose in it and give it an EYEtalian tuneup,,,drive the poop out of it....old school but it always works..
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Old May 29, 2020 | 05:53 PM
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Try to use fuel without ethanol in it. In Canada, Shell 91 or Chevron 94 are both good choices!
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Old May 29, 2020 | 06:04 PM
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Originally Posted by koala
Try to use fuel without ethanol in it. In Canada, Shell 91 or Chevron 94 are both good choices!
Topped off the tank 1/2 with esso 91. After driving around a bit it feels slightly better, so that might be the culprit. Petro can 94 must have a lot more ethanol right? I’ll top it off again in a few days at the shell close to my house and prioritize that station from now on.

thanks for the replies everybody
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Old May 29, 2020 | 06:48 PM
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Originally Posted by rockrdude
Topped off the tank 1/2 with esso 91. After driving around a bit it feels slightly better, so that might be the culprit. Petro can 94 must have a lot more ethanol right? I’ll top it off again in a few days at the shell close to my house and prioritize that station from now on.

thanks for the replies everybody
Esso 91 and Petro 94 both have "up to 10%" ethanol. It's absolutely anecdotal, but I find my 991 runs so much better without any ethanol. I found Petro 94 to be worse, in a way, as the higher octane is also developing a little bit more power than you would on 91, so it was making the these twitchy feelings more noticeable, IMO.
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Old May 29, 2020 | 07:31 PM
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UR all from Canada,,guessing gas supply is the culprit..
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Old May 29, 2020 | 08:26 PM
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So what's gonna happen if they enforce 15% ethanol like they plan to do in Quebec? we'll all have twitchy cars? 🤣
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