Question about 1993 Saturn SL1

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The engine idle high and never slow up

Why is the engine idling so high?

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  • Saturn Master
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Check the breather and any vacumn pipes for sucking in air also listen to the servo as well in case the diapragm is split and it sucking in air from their

Posted on Jun 04, 2010

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1 Answer

Revs high when i change gear


Is it possible the clutch pedal is interfering with the throttle? Start the engine in neutral and allow it to idle. Press only the clutch pedal down and see if this increase the engine speed. If it does speed up the engine and slows back down when you release the clutch then somehow this operation is where your fault lies. If it doesn't alter the idle speed, then rev your engine and release the throttle to see if it returns to idle immediately. If it is slow to return to idle then your throttle cable could be sticking. This means when you change gear lifting off the throttle has little effect and depressing the clutch to change gear causes the engine to race as the throttle is still partially open.

Aug 23, 2014 | 2005 Ford Fiesta 1.3

1 Answer

1996 Jeep cold start heater location


It likely has EFI (electronic fuel injection) and an idle air control valve that regulate idle speed. They can get gummed and fail to have a fast idle when cold, or get stuck the other way, and have a too fast idle all the or regularly take its time slowing down after you take your foot off the gas. An engine temp sensor can also cause a lingering high idle if it reports the engine as still being cold after warm up.

Aug 15, 2014 | 1996 Jeep Grand Cherokee

1 Answer

I have a 93 geo storm wit high idle when cranked an even while running fo to slow down again wit the idle high what do i do?


i cant understand that but got BAD idle.
there are different idle speeds, for hot ,warm and cold engine.
and the PCM (ECU) regulates idle with valve called ISC.
bad idle can be 1 of 2 things.
ISC sticking.
or engine runs so bad the ECU can NOT control idle.

clean the ISC, if not that
then its a big job, to find true cause. ASK !
one is finding air leaks.aka, vacuum leaks.

Jul 05, 2014 | 1993 Geo Storm

1 Answer

How can i slow down the rpm so the trans. could shift properly


What size of engine do you have. Does your engine idles high. Do engine idles high all the time or just when is cold?

May 05, 2014 | 1994 Ford Taurus

1 Answer

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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Jul 16, 2010 | 2004 Toyota Corolla

2 Answers

When I slow down to a complete stop, my 1999 chrysler sebring cuts off. Can you help me?


Possibly a transmission issue. The transmission has a "lockup" mode, where a clutch connects the engine directly to the transmission at cruising speeds. It is then supposed to unlock at lower speeds and for stopping. If it doesn't unlock, the car will stall at a stop. Try putting it into neutral (carefullly, so you don't go into reverse) as you slow down, if it doesn't stall out, it is most likely the transmission lockup mechanism.

If it stalls in neutral it is an engine issue. Bad idle control, bad ignition (it's easier to fire at high speed), bad fuel injector, bad air flow/pressure sensor... and more possibilities.

Feb 02, 2010 | 1999 Chrysler Sebring

1 Answer

1992 Mitsubishi Eclipse battery seems to drain & idle high/low


check for vacuum leaks in failing hoses and loose fittings

May 26, 2017 | 1992 Mitsubishi Eclipse

1 Answer

Rpms Too Low


the idle speed is controlled through the on board fuel injection control module (known as the PCM), even if u raise the idle at the throttle body the computer will slow it back down, however there is a problem that causes slow idle, do the following procedure to correct the slow idle issue, follow it exactly.

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 07, 2009 | Pontiac Grand Prix Cars & Trucks

1 Answer

2003 suburban idles to low.


the idle speed is computer controlled and not adjustable, slow idle is caused by a dirty intake, do the following.

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.

Mar 30, 2009 | 2003 Chevrolet Suburban 1500

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