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Transmission I have a 2010 Chevy Cobalt LT with 49,000 miles. Here is what I know. "P" Does what it should "R" has no reaction no matter how hard I push the accelerator (acts Like neutral) "N" mostly does what it should, car feels like as I press pedal, that it still wants to go forward "D" very slow acceleration the bottom two gears have the same reaction as "D"... my best guess's from what I've seen from other websites is the TCM might have lost communication somehow (I'm going to look into that tomorrow after I call GM), gears have slipped in the transmission or a sensor or more has failed... Has anybody else had this problem? How was it fixed?

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Posted on Jan 02, 2017

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SOURCE: 2001 chevy monte carlo hesitates or stumble on acceleration

try to clean the MAF which locat on the throtel and check the spark plugs from miss fire

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SOURCE: engine revving problem, 1999 chevy malibu ls 78k miles

Mine was the idle control motor

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SOURCE: Problem Code 44 on 89 C1500

The best thing would be if you had a scan tool to monitor the o2 sensor.If you suspect water just add some Heet in the tank and see how that goes.The only other thing is to check fuel pressure but the tester that hooks up on these is one that has to be hooked up on the fuel lines between the filter and the fuel line that goes to the pump.The fuel pump is in the fuel tank.There could be problems there also.The rubber fuel line from the pump to the sender could be bad or deteriorated.There is also a pulsator that is between the pump and the sending unit that can be bad. You could also have a plugged fuel filter.Depends on if it has ever been changed or not.Hope this helps.Good luck.

Posted on Mar 22, 2010

Testimonial: "Yes, I changed the fuel filter and have run Heet and other additives through the tank. I'm thinking fuel pump is the problem. Thank you."

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SOURCE: Engine revs with slow acceleration (manual trans)

Sounds like the clutch is going out.

Posted on May 14, 2010

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