Question about Pontiac Grand Prix

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2005 Grand Prix suddenly has no acceleration power/torque...

-To preface the issue; there was an existing issue with the exhaust, somewhere between the back seat and drivers seat. Yesterday, on my way home from the bank, my car seemed to "sputter" when I would press on the gas pedal. There was already a lack of power due to the exhaust leak, however this time seemed much more severe. As I approached the Highway entrance ramp, I released my foot from the gas pedal. When I pressed back down to accelerate, the engine rev'ed as if it was in neutral. Simultaneously, the heater blower was shutting off and turning back on. I pulled over and shut the car off. 30 seconds later it started right back up and went back in gear. There was still a tremendous lack of power, however I was able to make it home. Any idea what the issues are?

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1 Answer

Dead Battery or Bad Alternator

Posted on Jan 24, 2013

  • matwizzard05
    matwizzard05 Jan 25, 2013

    How should I test for which one is bad? Now that you mention it, my headlights dim when the fan kicks in.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 141 Answers

SOURCE: Acceleration issue

Just a suggestion, but the EGR valve can cause that problem. If that checks ok, then I would have the catalytic converter checked for clogging. Both ideas would cause that specific problem. I sincerely hope that this can solve the problem, or at least head you in the right direction. Best wishes.

Posted on Jan 17, 2009

emissionwiz
  • 75117 Answers

SOURCE: 2005 Dodge grand caravan 3.8 liters. Saturday

U may have got some bad gas, also maybe vapor lock.

Posted on Apr 27, 2009

wracefans24
  • 1985 Answers

SOURCE: 1997 s10 2 wheel drive truck. 4.3L v6 makes a loud

Your noise sounds like it is power train related,If you have eliminated the engine,Since it doesn't make the noise while moving and in neutral.
It sounds like a universal joint in the drive shaft.Do you notice a vibration
along with the noise?

Posted on Nov 17, 2009

  • 65 Answers

SOURCE: my 2008 jeep grand cherokee sputters when i

try cleaning the mass air flow sensor located in the intake tube by the air filter

Posted on Mar 02, 2010

SOURCE: 2004 Lincoln LS won't accelerate at 60mph, dies

Why would a dealer not be able to find the issue?
Start by checking codes.
If you have to, drive with a scanner,not a code reader on it,to capture data.
If it only has issues when turning the steering wheel and is speed related with the turning, you have a place to start.
I assume the dealer did all that.
I have a 2004 V8,so let me know, what help you need.

Posted on Mar 19, 2010

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1 Answer

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what does it have on it now? Always the same, always the safest. Law of mechanics

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