Question about 2001 Pontiac Montana

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Right after I start it the engine revs to 4000 then drops to 3500 then up to 4000(repeat it until I shut the vehicle off)

The thermostat needs to be replaced, I started to do the job then ran out of time and replaced everything and that is when this started.

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  • Antonio Delgado
    Antonio Delgado Dec 30, 2014

    Hi Joshua Garcia, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?



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  • 211 Answers

Sounds like you might have a vacuum leak, retrace your steps and make sure all hoses are connected and switches. By the way did the engine light come on if so it might have send an engine code. Good luck.

Posted on Dec 30, 2014


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Posted on Jan 02, 2017

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SOURCE: 1999 pontiac sunfire will not start

Maybe the starter is not notify to the engine.

Posted on Jun 17, 2008

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SOURCE: I bought this car and

you might chamge the cap and rotor. a hari line crack will cause it to do what you describe at a high rpm.

Posted on Aug 01, 2008

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SOURCE: Engine revving, but car moving slowly until higher gears

Check fluid level and see if it smells burned. If you do not work on it yourself, have a good reliable trans shop check it out. Usually the repair shop you use can recommend which trans shops do good work.

Posted on Apr 14, 2009

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SOURCE: My 1992 Trans Sport starts then shuts off right away

fuel problem somewhere along the line¿¿¿ but where ,i would remove the tank sender unit and check the pump and pump flexible connection first

Posted on Aug 14, 2009

  • 169 Answers

SOURCE: had mass senser replaced ran good 4 awhile now

Do you have an after market air intake that uses an oiled filter? If so - you could very well have fouled the MAF sensor again. If not - you could be having a misfire condition - which will throw a code and trigger the SES (Service Engine Soon) light. Any major auto parts store will have an OBDII scanner and will be able to read the code and clear it.

Posted on Sep 18, 2009

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My 2002 dodge durango hits 4000 RPMs and bounces between 3000 and 4000 RPMs when I am in park and have the throttle held down. I replaced the cam sensor and it is still doing it.

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My ford contour 2.0L Fi Automatic- can't go more

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I drained the cooling system, by remvoving the radiator plug, when I started to remove my starter motor, I then realised I couldn't manage it, so began putting everything back, when i started to top up the...

run the engine until it gets warm. shut the vehicle down and let it cool off. top fluid off again. you may need to repeat this. after topping off run car while keeping an eye on the temp gauge, alson turn the heat on high, if coolant is not full heat wont work.
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1990 1.5l wont rev past 3500rpm's

Honestly I wish I could offer you more info, if it revs now that eliminates the convertor, only I can figure is when you got it to rev you were "blowing the soot out" LOL I hope I have helped you some if so please rate me accordingly.

Dec 16, 2008 | 1990 Honda Civic

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Engine runs very rough

You have a throttle position sensor on your vehicle that needs proper voltage to work. First thing, get a good battery in it(one that cranks every time). This will keep the sensor from losing its memory. Then, with a new battery in, it will either smooth out or you will need to reset the tps yourself. Easy enough, just turn the key to position 2 for approx 2 minutes. Assuming everthing works properly, the sensor will learn its endstops on its own. If you stll are having issues, then have the dealer check it when they scan for codes. Also, the wrench flashing at you is the maintenance indicator, so you might want to have that done as well. Never hurts when you've just bought a vehicle.

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