RPMs oscillate at startup of 05 GT
10-07-2012, 10:02 PM
#1
2nd Gear Member
Thread Starter
Join Date: Nov 2010
Location: VA
Posts: 308
RPMs oscillate at startup of 05 GT
I have an automatic, and I've noticed the last few months that my engine sort of revs up and down a couple hundred RPMs when i start the car. It's quick, each oscillation is maybe half a second, and it only happens for 10 seconds or so. At first I thought it was only when I start in reverse to back out of my parking spot, but it also happens in drive as well. I haven't noticed any connection to temperature yet. Any ideas?
10-08-2012, 11:07 AM
#2
Join Date: Oct 2012
Location: Indiana
Posts: 12
Have you moved recently to a drastic elevation change? My 2010 did that after i went from sea level to 4000 but much worse. It sounded like it had a radical cam in it and usually only happened on cold days. But after installing several mods and putting a tune on it after disconnecting the battery it has seemed to quit. So I would suggest to try and disconnect the battery for a while to erase what the computer has 'learned' and re-connect and see if it works better. If not you may be in need of a tune up where some better plugs and coil overs may erase the problem forever
10-08-2012, 04:17 PM
#3
2nd Gear Member
Join Date: Mar 2012
Location: Texas
Posts: 417
Mine does this when it's cold out. (Below 70, I'm from Texas.) I figured it was an engine warm up thing. Doing engine things and such.
It stops after a few seconds and doesn't do it again until I let the engine set for awhile.
It stops after a few seconds and doesn't do it again until I let the engine set for awhile.
10-08-2012, 06:30 PM
#6
Join Date: Mar 2012
Location: Minnesota
Posts: 13
If you have a tune, it could be as simple as disconnecting the battery for a couple of minutes to reset it.
On the other hand, do you have the a/c or heat on? I notice with the a/c on during the summer that the rpm fluctuate as the unit kicks in. I hate when it does that since I have the FRPP cams.
On the other hand, do you have the a/c or heat on? I notice with the a/c on during the summer that the rpm fluctuate as the unit kicks in. I hate when it does that since I have the FRPP cams.
02-06-2013, 05:12 AM
#7
2nd Gear Member
Thread Starter
Join Date: Nov 2010
Location: VA
Posts: 308
ok, I finally managed to get this on video. This occurs immediately upon starting up the car. Sorry, no audio.
https://dl.dropbox.com/u/856477/car/rev.MOV
Does this still seem like a throttle body issue?
https://dl.dropbox.com/u/856477/car/rev.MOV
Does this still seem like a throttle body issue?
02-06-2013, 06:05 AM
#8
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
ok, I finally managed to get this on video. This occurs immediately upon starting up the car. Sorry, no audio.
https://dl.dropbox.com/u/856477/car/rev.MOV
Does this still seem like a throttle body issue?
https://dl.dropbox.com/u/856477/car/rev.MOV
Does this still seem like a throttle body issue?
