Idle stutter

[Jcopin]

It seems like right after i get gas the idle rpm will stutter a bit. It will drop to around 500rpm for a second several times over the first couple minutes after refueling. Is this normal? Would changing the plug gap to .028 from .030alleviate it?

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[TheWildman]

Is your a/c on whenever it drops to 500 RPM? I have the same issue on .028 gapped plugs.

 

[Jcopin]

No. Happens in winter. Happened yesterday..was 40 out lol

I'm thinking is the computer adjusting to new gas

 

[ZombieHunter]

You are correct the computer will go through and attempt re-calibration at various points and filling the tank is one of them. Which is a good thing in case you put lower or higher octane fuel in it, it will adjust the tune possible saving your engine..

 

[16EBPPAY]

Typically when the car has a defrost setting the AC compressor cycles on / off. It's done to help reduce humidity inside the car.

 

[solodogg]

Both my EB Mustang and EB Edge do this. I do suspect it's got something to do with recalibration after fueling up, something with the ECU trying to determine the fuel octane count. After a few minutes, it goes away until the next fill-up.

 

[ForYourOwnGood]

No. Happens in winter. Happened yesterday..was 40 out lol

I'm thinking is the computer adjusting to new gas

The A/C runs with the defroster on too to take the moisture out of the cabin, not saying it was the cause just a heads up.

 

[Jcopin]

The A/C runs with the defroster on too to take the moisture out of the cabin, not saying it was the cause just a heads up.

I do know that. Nothing was on.

 

[Husam92]

Guys I had similar issue after refueling on my PP 2015 .. after long story I figured out that the purge valve at the intake side was leaking vacuum which made the car run rich after a fuel up until it failed to the point that the car does not start properly after a refuel

 

[Impulsed7]

Could also be the evap system sending fuel vapor to the engine. full tank needs vapor purged, especially if you top off after the pump clicks off. (DONT)

 

[Jcopin]

Could also be the evap system sending fuel vapor to the engine. full tank needs vapor purged, especially if you top off after the pump clicks off. (DONT)

that's possible. i guess il stop doing that

 

[Impulsed7]

yea, seen more than a few wrecked evap systems because of that. and modern plastic tanks swell and one day go pop.

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