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Engine was idling up and down and then it idle up high after that the engine would not start

I would have to keep pushing the throttle to keep the engine running, driving the car the engine ribbs up & down and then it ribbed up high shut down completely now will not start.

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  • Expert
  • 87 Answers

Check fuel pump, injectors,things with gas

Posted on Nov 20, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1967 Ford Mustang-- idle problem

If I had to fix this, I would use a tiered approach. You have several issues to deal with. 1st- is the engine timing correct (lets assume it is), try adjusting the choke (blackdial on the ffront of a single barrel, turn towards lean) this should bring down the idle. Turn it till it almost dies then turn in the opposite dirrection SLIGHTLY until it steadies out. The engine might shake more now (it did w/mine) so now you losen the 1/2 bolt that is behind the distribibutor. Now that the dis. is lose turn the whole diss. assembily slightly in either direction. One way will steady out the engine, this is adjusting the ignition timmiing. If all that works out you should be golden. Of course there is a lot of possible causes connecting rod length between the gas pedal & carb, vac. leak(through a vac. gauge on it, that will help finding wether or not there is a leak). if this doesnt work repost with results and a vacum reading. I'll check back

Posted on Nov 23, 2008

  • 1 Answer

SOURCE: 2003 jeep liberty starts but shuts down right

usually need throttle body and idle air control motor cleaned

Posted on May 04, 2009

jryan11kc343
  • 19 Answers

SOURCE: Engine idling high in park. Will not start until

check your IDLER

Posted on Jul 11, 2009

  • 632 Answers

SOURCE: my 98 jetta 2.0 will not hold idle by itself until

Try replacing your Engine Coolant Temp Sensor, it's cheap and easy to replace. Just remember do it when the coolant is cool to work with before you start cracking a pressurized system.

Posted on Mar 05, 2010

duane_wong
  • 6826 Answers

SOURCE: idling problem toyota altis

Either there is a vacuum leak causing the high idle, or
the IACV is bad or being controlled by the computer to make idle speed too high:

To change the IACV refer to the following:
Idle Speed Control (Idle Air Control) Valve Removal & Installation To Remove:

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove the throttle body. Idle speed control valve toy_cor-04-18-1187.gif

  3. Remove the 3 mounting screws from the throttle body. Remove the idle speed control valve and gasket.
To Install:
  1. Using a new gasket install the idle speed control valve on the throttle body with the 3 mounting screws.
    • Tighten 33 inch lbs. (3.7 Nm).
  2. Install the throttle body.
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Posted on Jul 16, 2010

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1 Answer

Throttle acceleration


With high idle, I usually block off the mouth of throttle body, engine idling, it should kill the engine. If blocking off the mouth of throttle body has very little or no effect on the idle, you got false air getting in there from, somewhere. Just my opinion.

Sep 27, 2017 | Cars & Trucks

1 Answer

My van is idle high i cleaned the throttle boady and it idle down the a few hours later its high idle again why i replaced two sensor and still idle high


Hi Alexandra, Im AL the owner of Big As Auto Repair

There are several things that can cause high idle, but the 2 most common problems are as follows.

(1) You could have a vacuum leak somewhere on the engine. Here is how to check for that issue. Here's what I want you to do: Buy a can of CARB Cleaner and while the engine is running spray around the Intake Manifold, the manifold is the thing the throttle body sit on. Also spray around all the vacuum line as well. If while spraying there is a change in the idle speed then you have found your leak. If there is no change then move on to step 2.

(2) Sometimes when you have a high mileage vehicle parts begin to ware out or can also begin to stick in place. Here something you can check. Idle Air Control Motors can start sticking from corrosion build up and can cause a high idle issue. Here what I want you to do. Start the engine and let it idle, while its idling I want you to tap on the Idle Air Control Motor If it idles down to normal idle speed replace the motor. The motor mounts onto the throttle body and most of them are round. Once you replace it and start the engine you'll notice that its idling real high, :This Is Normal, just let it idle until the engine controller resets the idle speed to normal.

Hope this helps and should you need further help please visit my auto repair website. http://www.bigasautorepair.com/

May 25, 2015 | Cars & Trucks

1 Answer

I have a 2002 LW200 wagon with L61 Eco-tec. I installed rebuilt engine. Put back old IAC. I checked pintal to make sure it was 20MM. Engine starts great but idles at 2300-3000. After a few seconds the...


throttle position switch sounds like getting false readings to computer,
incorrect volts or excessive play from the throttle plate or sensor causes this,has to be one or the other,also check for any intake leaks from the filter to the throttle body,good luck,Gary

Oct 24, 2013 | 2002 Saturn L-Series

1 Answer

89 cutlass cierra crank but wont start when wet out unless gas pedal is pushed


This should be a drive by wire vehicle meaning it has a cable for the throttle body. First thing would be to see if any error codes can be pulled up (most parts stores will do that for free.) Drive by wire versus the late model that use electronic control for the idle have a IAC or idle air control which when first started controls the idle air intake--all air is run by it to idle the vehicle when cold--

Usual symptoms are rather high idle when cold engine or even idle and RPM jumping up and down and stalling when cold.

Another way if idle does drop when cold is tapping the gas--engine will still run until hot. Means not usually a fuel pump issue.

You could also have if the vehicle is fuel injected a dirty Mass air flow sensor, a throttle position sensor, etc.

These can be if the vehicle has them cleaned using a special zero residue spray cleaner.

First have it scanned to see what if any errors it shows--the computer.

Dec 17, 2012 | 1989 Oldsmobile Cutlass Ciera

1 Answer

Fast idle astro van


Check the base plate gasket under the throttle body, some time the gasket start to leak, and will cause a high idle, if possible with engine running get some water and pore it at the base of the throttle bode, you will hear a suction sound, that's the gasket, replace it.

Jul 14, 2010 | 1995 Chevrolet Astro

1 Answer

Car will not start without pressing gas pedal to keep idle speed up. If I keep idle at 900 RPM or higher it runs as long as foot is on gas pedal. It then stalls out when I take foot off gas pedal. No...


Have the idle bypass valve checked, also called idle air control valve.
If that valve is stuck in the closed position, it's not allowing the fuel to bypass the throttle plate to keep it idling, resulting in stalling, but will keep engine running if the pedal is pushed down.

May 14, 2010 | 2000 Toyota Camry Solara

1 Answer

What causes my 1993 grand prix to idle high on start up and keep climbing until the engine light comes on


STICKING THROTTLE LINKAGE OR FAULTY IDLE AIR CONTROL SYSTEM.ALSO THE THROTTLE BODY GASKET LEAK WILL CAUSE HIGH IDLE.

Oct 30, 2009 | 1993 Pontiac Grand Prix

1 Answer

A 1985 Sentra - The engine idles until warm then it dies.


has it got a idle control valve, have tried adusting throttle cable slightly

Oct 05, 2009 | 1985 Nissan Sentra 2 Door

1 Answer

2002 Regal - Engine kills right after starting cold.


There are 3 things that cause this, 1st and most common is a dirty idle speed control valve, 2nd is carbon on the back of the intake valves, last but not least is the wrong octane of fuel, if it requires 89 Octane and 91 or 92 is used the engine will stall code.

To clean the dirty idle control valve follow this procedure:
Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) 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.

Nov 17, 2008 | 2002 Buick LeSabre

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