Rough Idling with Ethanol Fuel??

strongceltic

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Apr 23, 2008

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Apr 23, 2008

#1

• Apr 23, 2008

• #1

Im not really sure if this has anything to do with it.. i have seen different reports, some people say that it does cause rough idling and lower gas mileage, while others say it doesnt
i recently filled up at the murphy station where gas comes with 10% ethanol fuel and rigth after, my check engine light came on and the car started shaking like crazy...
the gas is a lot less responsive and its making strange odors coming from the exhaust...

anybody have any experience with this???

 

Skymarshal

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Nov 5, 2004

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Dallas

Apr 23, 2008

#2

• Apr 23, 2008

• #2

It might just be a bad tank of fuel- contaminated with diesel fuel or something like that. Normally, 10% ethanol shouldn't cause rough running.

It will cause lower mileage, since ethanol has lower energy content per gallon than gasoline, but the difference should be minor.

You have a choice of ethanol or no ethanol? I wish we were so lucky in Texas! Normally if the state mandates corn gas, you have to cross the border into the next state to get your gas without it.

 

Mustang5L5

That is…until I whipped out my Bissell

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Feb 18, 2001

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Apr 24, 2008

#3

• Apr 24, 2008

• #3

10% shouldn't change much. In fact, that's all that is around me now. I've been filling my GT up with 10% for the past 2-3 years.

Go to autozone and have them pull the engine code for you.

 

strongceltic

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Apr 23, 2008

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Apr 24, 2008

#4

• Apr 24, 2008

• #4

thanks guys
i think that there might be water in the gas because the engine gives off this weird smell
and ive had this problem before when i filled up at the murphy
i put some STP in it to remove the water, so hopefully itll start running right
uhh, haha i dunno how to get my codes pulled :/
im new at this

 

ChingonStang

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Sep 19, 2004

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Apr 24, 2008

#5

• Apr 24, 2008

• #5

I have heard of your issue and I usually hear it from people who fill up at some hole in the wall, Mom and Pop gas station. It's always usually a bad tank of fuel. That is why I usually stick to the big name stations even if I have to pay a little extra. Sometimes that cheap gas price also means cheap gas.

 

strongceltic

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Apr 23, 2008

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Apr 25, 2008

#6

• Apr 25, 2008

• #6

thanks guys for your help
im gonna filler up with some good premium gas to run the system clean and if it isnt fixed then... iono haha

 

strongceltic

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Apr 23, 2008

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Apr 30, 2008

#7

• Apr 30, 2008

• #7

well, apparently..
the ethanol fuel caused my engine to run so hot that it burned through some spark plug wires and that was causing the misfiring
so i changed those..
and now it runs perfectly!!

 

racefan966

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May 21, 2008

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May 23, 2008

#8

• May 23, 2008

• #8

If you are using the e10 or e85 fuel your car is not made to run on it. Check out some of the sites on the web. This stuff is very corosive to plastic and aluminum parts as well as rubber parts. I even call wix filters and they say it will eat the glues and such. So I would not use it myself.

 

Mustang5L5

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May 23, 2008

#9

• May 23, 2008

• #9

strongceltic said:

well, apparently..
the ethanol fuel caused my engine to run so hot that it burned through some spark plug wires and that was causing the misfiring
so i changed those..
and now it runs perfectly!!

Click to expand...

Fuel wouldn't change engine operating temp.


I just think your spark plug wires burned up on their own and coincidentally the problem started after an E10 fillup.


Like i said previously. Gas stations near me are E10 only..and it's all i've been putting in for the last 3 years or so. My engine idles smooth and quiet.

 

racefan966

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May 21, 2008

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May 23, 2008

#10

• May 23, 2008

• #10

Mustang 5l5 you are right temp should not change it was probable just coincidental. If it runs fine I would leave it be. I would look into the ethenal mix and make sure it isn't over 10% if it is find a different gas station.