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Thank you Noel. I'm also having a hard time getting my car to accelerate after hitting 45 mph. And inn in the country with hills to climb. What do you think it is there?

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  • Brett Duxbury
    Brett Duxbury Dec 15, 2016

    Hi Dawn OBrien, does the car have overdrive gear in automatic transmission ? May be you need the non overdrive gear to get up hills

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Only a guess but this can be due to the cat convertor plugging up

Posted on Dec 15, 2016

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  • Cars & Trucks Master
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Run the fault codes and check the accelerator position sensor , throttle position sensor or cable for failures

Posted on Dec 15, 2016

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Posted on Jan 02, 2017

  • 48 Answers

SOURCE: the car will not accelerate;

this sounds like 1 of 2 possible problems.
a bad headgasket or a clogged catalytic convertor. i would lean more towards the convertor

Posted on Jul 16, 2008

  • 102 Answers

SOURCE: Jetta will not accelerate up inclines.

good chance you have a clogged cat converter ...with engine running have someone rev engine and see how much flow you have out tail pipe. also if you hear the sound of something rattling inside exhaust that is another tell tale sign

Posted on Mar 23, 2009

  • 109 Answers

SOURCE: Missing and backfiring during acceleration and climbing hills.

Could be vapor lock in the fuel system. Next time it does this, stop and try removing the fuel filler cap... Hope this helps...;-)

Posted on Apr 14, 2009

cadman000
  • 607 Answers

SOURCE: car jerking at 45 mph

sounds like you might have a misfiring spark plug or faulty wire

Posted on Apr 05, 2009

billshoff
  • 23 Answers

SOURCE: car lurches and bucks, rpms erratic on acceleration on hills

You could have any of these problems:
1) vacuum leak- broken air hose or disconnected air hose.
2) water in the gasoline- add a water remover to you gas tank.
3) bad or disconnected spark plug wire(s).
If this were my Forester, I'd take it to a mechanic who has a electronic engine tester..

Posted on May 07, 2009

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Most modern automatic transmissions have a chip in them that will prevent the car from downshifting, say, into first gear when you're moving at 60 mph. Still, I wouldn't try it. When climbing a hill, only downshift if the AT can't decide which gear to be in and switches back and forth--choose the lower one. When descending use brakes to decelerate. However, once you've braked, do use a low gear to coast in, to prevent you from freely accelerating down the hill.
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Missing and backfiring during acceleration and climbing hills.


Could be vapor lock in the fuel system. Next time it does this, stop and try removing the fuel filler cap... Hope this helps...;-)

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1 Answer

Car lurches and bucks, rpms erratic on acceleration on hills


You could have any of these problems:
1) vacuum leak- broken air hose or disconnected air hose.
2) water in the gasoline- add a water remover to you gas tank.
3) bad or disconnected spark plug wire(s).
If this were my Forester, I'd take it to a mechanic who has a electronic engine tester..

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1 Answer

Jetta will not accelerate up inclines.


good chance you have a clogged cat converter ...with engine running have someone rev engine and see how much flow you have out tail pipe. also if you hear the sound of something rattling inside exhaust that is another tell tale sign

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