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2002 mitsubishi triton 2.4 petrol idles low cold and revs high when worm and sometimes goes up and down revs quickly

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 2 Answers

SOURCE: 94 blazer vortec 4.3 idle revs up and dont come down

check your Throttle Positioning sensor that should fix your rough idle the TPS controls the breather on the front of the engine its affixed to the right hand side of the throttle body just infront of the spyder on the V6 Vortec 4.3L Models

Posted on Nov 15, 2008

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polarcycle
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SOURCE: how do you increase the idle revs on a 2002 lancer

Idle is computer controlled and no way to increase it. May want to make sure the throttle body is clean. Use carb cleaner and a soft tooth brush to remove carbon buildup.

Posted on Mar 06, 2009

  • 1 Answer

SOURCE: Idle Problem when you slow down of come to a stop idle goes low

THis has happened to me in the past. My fix was to clean the throttle body. The problem began after my battery died. The computer was defaulted back to its original settings after replacing the battery. Once I cleaned the throttle body, everything was fine. This happened at about 85,000 miles.

Posted on Mar 13, 2009

emissionwiz
  • 78267 Answers

SOURCE: idle irratic

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Posted on Apr 13, 2009

GregV24CHOPP
  • 11 Answers

SOURCE: when cold, it idles rough, revs high then low! After warmed up it runs fine

if it runs high when you first start it then mellows out,, theirs no problem , all of our chevys do that.... but if its sputtering or you hear a quiet popping noise check spark plugs

Posted on May 20, 2009

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03 corolla petrol revs up on its own when idling and then settles down again


R u start the car in cold morning or any cold condition? If so, it is normal revs up itself. Sometimes I see some cars revs up to 2000 rpm for 2 to 5 mins, then drop down to 1000 rpm.

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When my taurus has sat overnight...or when it's cold. When I start it, it acts like it wants to die...then it revs up all of the sudden and seems fine. The gauge goes in between 0 and 1 for a few seconds...


Without more info I would guess your Idle air control motor (iac) is going out - this component can be quickly tested at your local mechanic shop without much hassle. Hope this helps!

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2002 trailblazer LT (EXT) motor revs up at start-up , seems too high for my thoughts , then comes back down after a couple of seconds , mind you , it only does it after sitting overnight


It would be a help if you could let us know the idle speed when cold?
Vehicles usually have a higher tick over when they;ve been standing and are cold. It would increase by a few hundred RPM and then quickly drop back to normal as the engine warms up....
Regards Johngee10

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Mitsubishi Triton V6 lacks power on acceleration


full power is only achieved when the engine is fully warm(operating temp).so if you accelerate more than, say, a third of the gas pedal,the car will feel sluggish.
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Jul 05, 2010 | 1988 Mitsubishi Pickup

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Jerking when driving


Sounds to me like you need to take a trip to your local certified mechanic!
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Feb 07, 2018 | 2002 Ford SVT Focus

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Idle irratic


Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Apr 11, 2009 | 2001 Chrysler PT Cruiser

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Tempreture gauge drops to cold and car stops


Sounds like faulty engine temp sensor. When it drops to cold, the engine control unit picks this up and alters the fuel mixture accordingly. The ECU will be making it a very rich fuel mixture for cold starting, hence very poor running when engine is hot.

TL

Jan 12, 2009 | 2006 Renault 181

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