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Cobalt LT 2007 hesitating when accelerating

8 messages,  Last post on Jan 16, 2008 at 8:29 AM

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#1 of 8 Cobalt LT 2007 hesitating when accelerating by navyyeoman Dec 31, 2007 (9:02 am)
Nice car, however, when I go to accelerate to increase speed or to pass a car, the car hesitates a few times then picks up speed.   Has anyone had this problem? Let me know. Thanks. Replies to this message: jtk152 (Jan 01, 2008 9:41 am) navyyeoman (Jan 09, 2008 8:10 am) cadeless (Jan 11, 2008 5:39 am) bws10 (Jan 16, 2008 8:04 am) navyyeoman (Jan 16, 2008 8:29 am)
#2 of 8 Re: Cobalt LT 2007 hesitating when accelerating [navyyeoman] by jtk152 Jan 01, 2008 (9:41 am)
Replying to: navyyeoman (Dec 31, 2007 9:02 am) Do you get an RPM bounce out of it? Engine basically goes Rrrr....Rrrr...Rrrr and the tach bounces +/- 500RPM's? My 2007 LS 2.2L Auto has done this since around 3Kmi. It happens when the torque converter tries to lockup under load. I haven't taken mine in because I have no check engine light and the car doesn't do it every time.   Joel Replies to this message: navyyeoman (Jan 09, 2008 8:10 am)
#3 of 8 Re: Cobalt LT 2007 hesitating when accelerating [jtk152] by navyyeoman Jan 09, 2008 (8:10 am)
Replying to: jtk152 (Jan 01, 2008 9:41 am) Brought it in to my dealer. They reprogrammed the computer as it relates to the transmission.   Appears as though the problem is resolved.
#4 of 8 reprogram by jtk152 Jan 09, 2008 (9:25 am)
Out of the 3 or so occurrences of this issue I've heard of, your the first where re-flashing of the PCM worked. I'm curious to see if this works long-term,   Joel
#5 of 8 Re: Cobalt LT 2007 hesitating when accelerating [navyyeoman] by cadeless Jan 11, 2008 (5:39 am)
Replying to: navyyeoman (Dec 31, 2007 9:02 am) The only time mine has cut out, in any way, was when the driving conditions where to much for the car to handle, ex I was gettin off the freeway when it was raining and i just had to make the light, a 90 degree turn and i was doin bout 40 into it, the car had told me low traction, half way into the turn is when it stalled, the car took into account the speed, low traction, and how hard i cranked the wheel, and cut the gas before i lost traction
#6 of 8 hesitating when accelerating by bws10 Jan 16, 2008 (8:03 am)
i have a 2006 SS i have the same problem when i accelerat it hesitates for a few seconds then makes a reving sound then the speed picks up dramatically
#7 of 8 Re: Cobalt LT 2007 hesitating when accelerating [navyyeoman] by bws10 Jan 16, 2008 (8:04 am)
Replying to: navyyeoman (Dec 31, 2007 9:02 am) i have a 2006 SS i have the same problem when i accelerat it hesitates for a few seconds then makes a reving sound then the speed picks up dramatically Replies to this message: navyyeoman (Jan 16, 2008 8:29 am)
#8 of 8 Re: Cobalt LT 2007 hesitating when accelerating [bws10] by navyyeoman Jan 16, 2008 (8:29 am)
Replying to: bws10 (Jan 16, 2008 8:04 am) Well it looks as though the dealer knew what he was doing. I have gone thru various scenarios since they did the reprogramming of the computer and she runs like a top. I guess on these newer cars everything is programmed into a computer.   Might want to try your luck at the dealer. Took less than a hour for me.   Good luck.

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