My 2005 Chevy Cobalt is acting up. Every time I start it up and take it from park to drive and place my foot on the pedal to accelerate the car just rolls and does not accelerate. To get the car to accelerate I have to place it in reverse then into drive, it stalls a moment then begins to accelerate.
Some problem in the valve body most likely. Do you get any fault codes when you scan the engine/transmission control module?
SOURCE: Car accelerates when I remove my foot from the gas pedal
This is only a suggestion, if you used the cruise control lately, better have that checked, it might be stuck in the on position
SOURCE: throttle/Idle/running problem - wants to run too fast, or stall out
RPM's up and down check EGR valve and sensor. EGR valve and sensor control idle. That's why your getting the surging on rpm's and this could be giving out the other codes. If mass flow was bad car will not start and the same for the map sensor. O2 sensor measures gas and air for right mixer. TPS controls 0-60 speed as in throttle respons.
SOURCE: i have a 2006 jeep grand cherokee 4x4 5.7L HEMI. I
It sounds like the technician ether unplugged or damaged your idle air speed sensor. I would return the cherokee and file a complaint. Armed with the knowledge of the possible problem you may come out of this with the job done correctly. Hope this helps. Good luck cj2176.
SOURCE: I have a 2005 TDI Automatic Passat. If I place it
is the trand fluid full? has the trans fluid and filter been changed every 60,000 miles? if not service the trans and retest, many times a fluid and filter change cures this problem, if it doesn't u will need to have the transmission serviced completely
SOURCE: 2005 chevy cobalt, car wont start ... check
disconecting the battery should reset the pcm. but you will need to find out what caused the problems.
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