Question about Chevrolet Cavalier

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Car Revs up & down until it gets warmed up (intermittently)

Sometimes I start my car she runs fine, sometimes I start her she revs up & down like it's shifting up & down until it warms up. Once it warms up speedometer works & it stops reving. Anyone know what it could be? Side note - why is the speedometer working intermittently as well? Once everything warms up it works fine.

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  • Bobbie Codi Sep 06, 2012

    Ck'd vacuum lines - replaced one - still does it. Replaced fuel injectors a while ago, so don't think that's the issue. Idle Valve good. All suggestions below are quite old - any fresh ideas?

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  • Expert
  • 120 Answers

Cold idle control sensor bad

Posted on Sep 06, 2012

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6 Suggested Answers

6ya6ya

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Posted on Jan 02, 2017

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Anonymous

  • 625 Answers

SOURCE: revs boucing

try to add some lucas aditive to it, if does not solve the problem then your reverse might be about to brake, but this lucas aditive try to add with a transmission tune up at same time

Posted on Jun 19, 2008

martin538

steven martin

  • 117 Answers

SOURCE: Intermittne revs when car starts until it warms up.

Sounds like you have an air leak from one of the vacuum lines. Does the engine idle normally when at normal running temperature?

Posted on Apr 07, 2009

Anonymous

  • 1 Answer

SOURCE: 2000 sonata GLS 6 Cyl. Start the car and it stalls.

Check your idle control valve...

Posted on May 14, 2009

toyotech6

  • 318 Answers

SOURCE: Toyota Camry revs up to 3kms when started

Sounds pretty normal to me.

Posted on Sep 25, 2009

Anonymous

  • 97 Answers

SOURCE: Rpms jump up and down until car warms up

crank position senser

Posted on Feb 11, 2010

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1 Answer

Sat. 01 sl wait 1/2 hour to start when warm. stalls when ideling 1/2 hr restart


You have a bad air intake manifold gasket. If it runs idling high, take a can of brake cleaner and spray it on the air intake manifold by the firewall. Spray it right where the air intake bolts on. There are 8 10mm bolts or nuts there. When you spray it while idling, the revs will come down. This makes sure that is the problem before you go any farther. My 02 did the same thing.If you need to know how to change it, let me know, I can walk you through it. It's a one to two hour job, b ut easy

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Revving when warmed up cold its fine


air leak on the intake the gasket may be leaking. sometimes just needs the top bolting back down.... letting more air in than needed. vibration can cause the bolts to come lose.

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High rev at cold (winter cold!) idle


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Vw polo, 1.4 petrol, 1996. when slowing down revs drop and car stalls and can be difficult to start again. when driving it can suddenly get abit jerky, no power from accelerator then loses the revs and...


HOT/WARM START ISSUE


Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

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1994 Toyota Pickup: Starts fine but dies in few seconds?


http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

------------

1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html

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2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

Delay starting on Toyota Prius?


http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

-----------

Honda car will not start intermittently?

http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

--------------

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Intermittent starting issues on Volvo 760?

http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

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Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

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Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

===========

These details will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

1 Answer

Jeep liberty 2002 3.7when starting cold starts-stalls unitl hot


Check the temperature sensor feeding the ECU and O2 sensor.

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1 Answer

Intermittne revs when car starts until it warms up.


Sounds like you have an air leak from one of the vacuum lines. Does the engine idle normally when at normal running temperature?

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Problems with Rev's on my golf


could be the MAF sensor (mass airflow sensor) ??

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