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How to repair high idle

All that i did was tune it up once complete turn on car now idles very high

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Re-tune your computer box @ retune your carb.

Posted on Nov 19, 2014

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  • Cars & Trucks Master
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Check TPS sensor (RPM).

Posted on Nov 19, 2014


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Posted on Jan 02, 2017

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SOURCE: Idle is very very High

Check under the hood for any small vacuum hoses that are broken or disconnected. You will find a lot of small hoses! Most high idle problems are the result of a vacuum leak. Try idling the engine and spray short bursts of WD40 in different areas under the hood. If the engine idles lower when the stuff is sprayed in an area, that is more than likely where your leak is. Don't go overboard with the WD40, just short bursts.

Posted on Oct 27, 2008

  • 156 Answers

SOURCE: 1996 FORD CONTOUR 4CYL ROUGH IDLE ROUGH ACCELERATION

no problem. If you are getting that low of voltage on a load then you might want to test the alternator as well to make sure it is running at capacity.

Posted on Feb 23, 2009

  • 94 Answers

SOURCE: engine codes p1133 p0171 p0507 p0131 all at once

throttle position sensor

Posted on Mar 10, 2009

GM Elec
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SOURCE: engine codes p1133 p0171 p0507 p0131 all at once

Per your description, it sounds like you have a vacuum leak.
Check all vacuum hoses at the engine, make sure no hoses are disconnected, cracked or damaged.
Disconnect each hose at the source on the engine and see if the engine idle stabilizes.
Let me know what you find and we can go from there.
Regards.

Posted on Mar 10, 2009

  • 1 Answer

SOURCE: high idle

Clean the Idle Air Control Valve. It's on the throttle body below the Throttle Position Sensor. Worked for me! Good luck.

Posted on Oct 15, 2009

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I have a 98 Chevy express 5.0 done complete tune up runs smoother but high idle what can I do to idle it down


The idle is computer controlled. Have a look for any disconnected/split vacuum hoses allowing unmetered air to enter the engine which will cause a high idle. Have a look inside the throttle plate and inspect for dirty/black. If so, clean with a carb spray and toothbrush. This can affect idle if the plate is sticky. You may also have a sticky idle air control motor causing this issue

May 20, 2015 | 1998 Chevrolet Express

1 Answer

High low idle, rough idle stalling


If it's surging, make sure your radiator is full. Do a tune up, plugs, wires, etc. Put some fuel injector cleaner in your fuel tank. On a cold start the vehicle compensates for being cold by adding fuel. Once it warms up the computer tells it to quit adding extra fuel. If it is a bad sensor of sorts, check engine light should come on.

Dec 11, 2013 | 1987 Ford Tempo

1 Answer

Have a 1996 camaro that is idling high and rough


Check your mass air flow sensor on your air intake it has a connector plugged in it or just take it in for a full tune up

Mar 07, 2013 | 1996 Chevrolet Camaro

1 Answer

98 explorer 4.0 SOHC wont idle and stalls when weather is below 40 degrees. worse when colder. Just had tune up, new airfilter new fuel filter but problem did not get better.


you have a bad idle air control valve. its job is to have motor rpm high until the motor warms up then turn it back to normal.

Jan 23, 2013 | 1998 Ford Explorer

1 Answer

Suburban high idle


go to a parts store ie auto zone advance auto etc. and get the codes ran they will normally do it for free

May 04, 2012 | Chevrolet Suburban Cars & Trucks

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My 1993 jeep grand cherokee laredo idles rough after warm up. it also idels high around 2000 rpm at start up sometimes and needs to be shut off and restarted to calm idle speed. whats is causing the...


usually rough Idle is not noticable at high ildle. Once it is idles normally try Disconnecting one injector at a time. If the idle stays the same than that cylinder is the culprit. Remove that spark. If it is wet than do a compression test. Should read better than 100lbs of compression.If compression is good take a spark plug and hook it into the end of the plug wire.Lay it across the intake,start the car and watch for spark. If you have spark than you probably have a bad injector. A miss will cause the vehicle to idle high. The computer is trying to keep the car from dieing out. Hope this helps. No spark do a tune up.

Dec 05, 2010 | 1993 Jeep Grand Cherokee

2 Answers

SPUTERING AFTER ADDING 2 DIFFERENT FUEL INJECTION CLEANERS TO GAS TANK. NOTE: OWNED VEHICHLE 5 YEARS NOT TUNED UP SINCE OWNERSHIP ?


Sounds like it is time for a tune up. Do the plugs, wires, rotor button and distributor cap. Maybe do the wires too. Check the ignition coil also to make sure it doesn't show any signs of failure. www.fcpgroton.com sales an entire tune up kit.

Oct 12, 2009 | 1996 Volvo 850

2 Answers

My 2002 Ford Taurus will shutter and die when running the air conditioner and sitting idle at a stop sign or stop light. When I turn on the air conditioner the rpms will fluctuate up high above 2 and then...


the idle air control valve is responsible for engine idle.
this is a common failure on ford's. but I don't think yours is bad because it does idle high befor it dies.
you stated you had codes p0171 and p0174 these are lean codes for bank one and two, you said you found a vacuum leak and repaired it, the vacuum leak was mostly likely the cause of the lean codes, however the pcm has calibrated the fueling stategy for this lean mixture, what you need to do is erase the KAM "keep alive memory" this is done by unhooking the negative battery cable for 60 seconds, this is the only way to erase the KAM the $6000.00 machine I use wont even do it.

once the KAM is clean the computer will go into a relearn state and all operating values will be adjusted for the vehicles current condition, during this relearn session the vehicle may have some driveability issues (low or high idle, stalling, poor fuel economy) the relearn should complete within 10 minutes of idling and then 10 minutes of driving.

good luck and keep me updated

wesleyschacht@hotmail.com

Jun 14, 2009 | 2002 Ford Taurus

1 Answer

1993 v4 2.3l isuzu pickup idles high when a/c is on


Try replacing the EGR valve!
Also make so you accelerator cable isn't kinked, if it is replace it!

Jun 11, 2009 | 1993 Isuzu Pickup

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