RPMs reving up and down
#1
I have a 2006 V6 manual with 1000 miles on it. I noticed while idling at a stop light in nuetral the RPMs jumped a small amount, say 100-200. People said this was somewhat normal so I shrugged it off. Now I have a bigger problem that doesn't seem normal.
Today when driving home I was going down a hill so I put her in nuetral and coasted. The RPMs started reving up and down from 1000-2000. It kept doing it over and over as long as I was coasting in nuetral. It was a slow rev as if I was pressing the gas. Once it got up to around 2100 it would go back down to 1000 and then rev up again until I put it in gear.
The air conditioning was on so I turned that off and still did the same. Then I was on flat road in a 45 speed limit area. So I put it in nuetral again and coasted and same results. I stepped on the gas a little in nuetral a few times to see maybe if it was stuck somehow but no it kept on doing the same thing.
I could see maybe jumping a little bit, but jumping 1100 RPMs doesn't seem right. So what is the problem? Should I take it in or see if it goes away?
Today when driving home I was going down a hill so I put her in nuetral and coasted. The RPMs started reving up and down from 1000-2000. It kept doing it over and over as long as I was coasting in nuetral. It was a slow rev as if I was pressing the gas. Once it got up to around 2100 it would go back down to 1000 and then rev up again until I put it in gear.
The air conditioning was on so I turned that off and still did the same. Then I was on flat road in a 45 speed limit area. So I put it in nuetral again and coasted and same results. I stepped on the gas a little in nuetral a few times to see maybe if it was stuck somehow but no it kept on doing the same thing.
I could see maybe jumping a little bit, but jumping 1100 RPMs doesn't seem right. So what is the problem? Should I take it in or see if it goes away?
#3
mine does that, it will go between 500 and 2000 rpms.
but i found that after i start the car if i let it run for a few minutes before driving off, letting the rpms settle down to normal it wont fluctuate..
but i found that after i start the car if i let it run for a few minutes before driving off, letting the rpms settle down to normal it wont fluctuate..
#4
Originally posted by kevinv-6@October 4, 2005, 11:24 AM
mine does that, it will go between 500 and 2000 rpms.
but i found that after i start the car if i let it run for a few minutes before driving off, letting the rpms settle down to normal it wont fluctuate..
mine does that, it will go between 500 and 2000 rpms.
but i found that after i start the car if i let it run for a few minutes before driving off, letting the rpms settle down to normal it wont fluctuate..
#5
Team Mustang Source
Mine does the same thing, my guess it was the computer trying to keep up as well, but I have just noticed it recently. If this is so, do I need to stop coasting as well, is this revving in neutral damaging to the engine?
#6
Mine does the same thing.. I have heard of the Gremlins of 1967 which haunted the Ford factory cause this..
So I have gotten used to the little suckers.. They wont hurt anything, they are just excited about the new Mustangs like us.. There old, from the year 1967.. Buy'em a hamburger or something.. I normally leave a half eaten burger in the trunk, this keeps them happy!
I dont want to scare anyone, but late one nite while putting the gas in the car, I saw something like this peek out at me through the driver side 1/4 window.. When I opened the door, he was gone.. All I could hear was the faint sound of a giggle coming from the trunk.. I opened the trunk and nothing.. Then i researched it, and this is what I found..
so if you ever put gas in the car real late at night, avoid looking into the driver side 1/4 window..
So I have gotten used to the little suckers.. They wont hurt anything, they are just excited about the new Mustangs like us.. There old, from the year 1967.. Buy'em a hamburger or something.. I normally leave a half eaten burger in the trunk, this keeps them happy!
I dont want to scare anyone, but late one nite while putting the gas in the car, I saw something like this peek out at me through the driver side 1/4 window.. When I opened the door, he was gone.. All I could hear was the faint sound of a giggle coming from the trunk.. I opened the trunk and nothing.. Then i researched it, and this is what I found..
so if you ever put gas in the car real late at night, avoid looking into the driver side 1/4 window..
#7
i just had this happen too, i have a post in gt tech forum
http://forums.bradbarnett.net/index.php?showtopic=37067
i think it may just be the cold playing with the car, cuz it just started as it has gotten cold
http://forums.bradbarnett.net/index.php?showtopic=37067
i think it may just be the cold playing with the car, cuz it just started as it has gotten cold
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