Question about 2003 Ford Mustang

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Started idling higher around 2000 rpm no apparent reason. Why

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Float may be sticking some, may get you some carbarator cleaner and spray it doun real good inside and out. Also need to check for vacume leak's good luck '

Posted on Mar 26, 2011

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Posted on Jan 02, 2017

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Vibrations during idling


which engine.??? never post lacking engine ,here is why.
1.3 L G13B I4
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Ill answer in the generic and for GAS engines. only.
that is illegal RPM, the ECU regulates it to 800 all the time
that means the ECU can not regulate the RPM now, for many reasons.
and sure it vibrates too low, that is normal for all 4cylinders to do that.
no bad engine mounts never lower RPM to 600, ever.
they dont control idle speed at all.
the #1 reason for most cars to idle too low are:
1: EGR leaks, (clean it)
2: ISC stuck closed (electric idle speed acututor dirty) clean it.
3: gross misfiring , caused by bad spark or bad fuel mix.
4: low compression on 1 or more cylinders (real low) Do compression test at WOT. throttle.



Apr 19, 2014 | 1997 Suzuki Baleno

1 Answer

High Idle at Start Up


This sounds like the RPM may be a little high, but normal operation is called a "cold start routine". Like the old fashion Choke, the "cold start routine" is suppose to increase the RPM for several minutes and then decrease to running idle speed. This will engage in each "cold" start, but not on a warm engine. It is designed to do this.

Usually when an engine runs higher RPM than it is set for, it means extra air is entering the engine from somewhere. Using a spray water filled bottle, go around seams and also spray vacuum lines and the EGR pod while the engine is running. Any openings will draw in the water and affect RPM. Then you will have found the leak.

Now you can look up you exact engine on the Web and find out 2 things. If it has a 2 piece intake manifold and if it has intake Manifold runners. The 2 piece design often failed when the gasket holding the 2 halves started dissolving. The intake runners, could stick out of position and make RPM higher.

Now aside from these 2 items, you might get a Code showing that the engine is running lean. This would actually not be showing the lack of fuel, but the overabundance of air coming from the leaks.

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1 Answer

Over revving


Check for a vacuum leak. This can cause a higher than normal idle. It can also cause a surge since the idle air control tries to adjust the amount of air required to idle.

Oct 26, 2013 | Volkswagen Cars & Trucks

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1988 Chevy Truck 305 Engine Idling and ****** shifting problem


check the vacuum lines going to the tranny, but it sounds like a vacuum leak, when the engine is at idle, spray a few short blasts of starting fluid around all the vacuum lines, if the rpms jump up, thats where the leak is

Jun 07, 2017 | Chevrolet Cars & Trucks

1 Answer

My 2000 gmc sierra z-71 has started idleling at about 1300 rpm after driving for a while. when i turn it off and restarted it would idle fine for a while then start idleing high again. it is getting to...


I assume the check engine/ service soon light is on. Commonly the MAP sensor is the culprit, but can be TPS, CSS, even a buggy O2 sensor. Only way to be sure? (light or not) is to scan it.

Jul 02, 2017 | 2000 GMC Sierra

1 Answer

What would cause my 2003 ford escape to idle around 2000 to 3000 rpm after it has been running for a while. it runs fine when it is first started up.


If your A/C is on , or you are running the climate control in the defrost windshield mode , the engine will idol higher than normal.
A Vacuum leak could also cause a high idol.. check the vacuum lines and be sure they are in good condition and all plugged in.

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