Question about 1992 Hyundai Excel

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The ajustment on the carburetor not working properly causing the engine to be on high rev please asist to solving this problem

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Replace the IAC. this is the idle air control. it is located on the upper portion of the intake or on the throttle body. this unit con trols the idle speed.

Posted on Apr 17, 2009

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First thing in morning start engine but over revs at idle speed. once driving engine warms up then seems ok. finish work at night same thing happens again. does it mean its sucking air in somewhere or...


Hello Mark,
You should be looking at the idle air intake control motor, as that will often become clogged up with sludge or grease /dirt combination that will prevent it from working properly. When it doesn't work right the car will either stall a lot or will rev very high when cold (because the computer will try to make up the difference and prevent the engine from stalling. You can clean it using carburetor cleaner sprayed on it's shaft. If it still won't work correctly the motor should be replaced.
Please use the following link to view to all the possible placements of this motor and how best to clean it;
idle air intake control motor Google Search
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Good Luck!
Rich Lilja

Mar 20, 2015 | Ford Focus Cars & Trucks

1 Answer

1987 Dodge Dakota 3.9 engine, Holley 2 barrel. Having running issues. Bought the truck cheap cause it wouldn't run. Cleaned the carburetor and installed a rebuild kit. Starts right up and idles great....


Yes, the floats may be causing the fuel level in the carb. to be too high. The black plugs indicate running too rich. Clean the plugs and check the fuel level.

Sep 09, 2013 | 1987 Dodge Dakota

1 Answer

My truck sits still, runs good. if i rev it up it will start to smoke,a little than real heavey. if i drive it , as i speed up it sounds like its loading up then it will rev up on its own real high an


Having to guess whether this is a gasoline or diesel motor and it would help to know if smoke was white, blue, or black as each is a discharge of either water, oil, or gasoline or diesel fuel.
The high revving is an indicator of your main problem. Something is being drawn into the cylinders and the rate and volume are not being regulated. At idle, a slow draw is producing minimum smoke. Then the problem gets worse as you increase RPM to drive the truck.
If this is a carbureted gasoline engine, check the power valve in the carburetor for rupture. If this is an injected gas engine, the TPS switch may be causing the flooding. Also for carbureted engines, the gasohol fuels eat up the rubber parts inside the carburetor and make the gaskets swell. Older carburetors need rebuilding with alcohol resistant gaskets and components.
Another possibility is a fuel pressure regulator for the injected models. Also try unplugging vacuum lines and observing if transmission fluid or other substances are inside the vacuum lines.
Each generation of Onboard computer has different capabilities. Yours is several generations old. But there are a few problems your system could report. That would mean that the monitored systems are not the problem.
You might want to remove a sparkplug and see how it is firing and what type of deposit might be on the electrode.
If your engine still has a vacuum advance on the distributor, check the vacuum pod. Trucks were built "old-style" as pollution laws differed for cars and trucks and some trucks were even exempt by weight class.
Would like to know the end result of your case.

Jul 12, 2013 | 1993 Ford F350

1 Answer

How to i adjust the idol speed on my 1985 cutlass supreme? I do not have a gauge for rpms.. but it just sounds and feels to high.. i've cleaned the throttle body and everything.. what piece do i turn or...


The car came with a cable so look to the area where you can accelerate or rev inside the engine. This is near the carburetor, I think that is the engine that you have.

THere will be a brass bolt that aspirates the car. turning this while the engine is running will cause it to rev up and or down.

Feb 05, 2011 | Oldsmobile Cutlass Supreme Cars & Trucks

2 Answers

Old ford fiesta stalls when i come to a junction engine revs die if i rev up


Hello, yes the problem could me related to a vacuum leak around the intake manifold or carburetor area. What technicians often do is listen for vacuum leaks or spray some carburetor cleaner spray (can) that you can get at an auto parts store around the rubber vacuum hoses to locate the leak. If the engine speeds up when your are spraying, you have located the leak.
The other problem that likely comes up is the EGR valve opening up too soon or when the engine revs and this causes the engine to cut out. You can block off the EGR valve to trouble shoot the problem. If blocking off the EGR valve solves your problem, then you know where the problem is.

Sep 11, 2009 | 1993 Ford Festiva

1 Answer

1993 Toyota Corolla revs high and will stay that


Automatic choke stuck on.Replace it the car is running to ritch.

Jul 17, 2009 | 1993 Toyota Corolla

4 Answers

2000 dodge neon high idle


you might need a new idle air control module, dont adjust your idle

Jul 05, 2009 | 2000 Dodge Neon

1 Answer

Spedometer and high rev problem : 2002 kia spectra


sounds like the electronic speedometer cable, look around the trans for any wiring that may have gotten burnt

May 07, 2009 | 2002 Kia Spectra

1 Answer

Car revs too high


you can ajust the engine rpm idle from the idle screw and air flow screw on the intek housing

Dec 21, 2008 | 2003 Toyota Corolla

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