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1986 s15 2.8 -engine idles to high (no adjustments) hard on transmission. Please help!!!

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Those are noted for the throttle body gasket to get sucked in and break. Spray propane or carb spray around the base of the throttle body. If idle speed changes, the gasket needs to be replaced.

Posted on May 18, 2014

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Posted on Jan 02, 2017

CamaromanCJ
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SOURCE: chevrolet sprint 1986 idling high trying to find the

If the vehicle is a carborated engine, you would find your vehicles throttle body where the linkage connects for your acceleration. Most engines then have the idle screw very close to this linkage. Though from what little photo's I have seen of the vehicles engine compartment via google images. I unfortunately can not direct you as to where the throttle body on the engine is located.

Posted on Apr 14, 2009

  • 1 Answer

SOURCE: 1986 Honda Accord DX - too high idle on cold start

1986-1989 Honda Accord with Carburetor have a very bad habit that is little known even by most mechanics but easily fixed at home. The vacuum port on the choke opener that is connected to the intake manifold and both vacuum ports on the fast idle unloader get plugged up with nasty hard carbon almost as hard as metal. When this happens the choke sticks closed and the idle sticks on fast idle when the engine is cold and nobody can figure out why. All you have to do is attach a small drill bit to the end of a flexible socket-driver extension and put it in a variable speed drill that will let you run it real slow and carefully drill out the vacuum ports that are plugged. After they are nice and clean use a vacuum pump tester to make sure the choke opener and fast idle unloader are working before putting it all back together. It's amazing how much better the car runs after cleaning out those ports.

Posted on Sep 27, 2009

  • 538 Answers

SOURCE: engine idles excesivly high after carb was rebuilt.

I sounds like the choke is not adjusted properly or the linkage for the fast idle cam is sticking. The fast idle cam is on the right side (passenger side) of the carb kind of behind the choke assembly. It could be the choke pull-off is not working or is not adjusted properly. Does the choke open all the way when the vehicle is fully warmed up? If not I'm guessing the choke stat (black plastic round) is not working or is installed wrong. Does that one have a wire going to the stat, is there 12V there when engine is running? That gets power direct from the alternator and will only have power there when the engine is running.

Posted on Dec 13, 2009

  • 14 Answers

SOURCE: 1986 HONDA ACCORD IDLES TOO HIGH 3000-3500 RPM

It may be caused by a vacuum leak, make sure to check all your hose for cracks and/or hoses that may have popped off

Posted on Mar 29, 2010

SOURCE: the idle is so high about 1500rpm i already clean

Hi Loret,
The idle control is electronically controlled. If the idle speed is too high, its likely that the cold start unit which is fitted to the throttle body is defective and should be replaced....
One thing I've noticed living in a hot climate....Many of our mechanics remove the thermostat believing it serves no function in a hot climate. The thermostat in fact is a critical component in all climates and must be fitted, particularly with fuel petrol injected vehicles. If removed the the result will be incorrect temperature signals being sent to the management system, which in turn could result in the fast idle you are describing. The computer will be told that the coolant is cold and therefore increase the idle speed as if the engine is still cold!
Regards Johngee10

Posted on Feb 06, 2011

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I have a 2006 nissan quest that idle is high all the time went driving step on the breaks it filds it is never is goin to stop the transmission works verry hard


The idle speed of a warm engine should be 750 to 775 RPM. The idle is adjustable, but the idle could be high due to another sensor problem.
In that case a mechanic should do a scan to see if an error code exists.
Hope this helps.

Mar 30, 2015 | 2006 Nissan Quest

1 Answer

1986 HONDA ACCORD IDLES TOO HIGH 3000-3500 RPM


It may be caused by a vacuum leak, make sure to check all your hose for cracks and/or hoses that may have popped off

Mar 29, 2010 | 1986 Honda Accord

1 Answer

I have a 1986 ford ranger 4x4 with a 2.9l and auto transmission. It is very hard to start. When it does finally start it idles high. What could be the problem?


If the idle remains high after the engine is warm, then you have a vacuum leak. Check all of the rubber hoses coming from the intake after the throttle body.

Mar 05, 2010 | 1986 Ford Ranger 2WD

2 Answers

Engine idles excesivly high after carb was rebuilt.


You need a new choke pull off. They are around $30 dollars.

Dec 09, 2009 | Ford F-250 Cars & Trucks

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My 2005 nissan maxima jerks and races. Is that my transmission


I have encountered this problem before. Your transmission is probably the aisin warner 5550. These 5 speed automatic transmissions were used in some maximas from 2004 - 2006. The short answer is you will at least need a new & updated valve body. Because the valve bodies tend to have that problem, other internal transmission damage may result. I rebuilt and updated a valve body for a customer and the max ran fine after that. Even now months later, my customer's transmission is still running great and it has never jerked again. I already wrote a long post with pictures on enginegeeks.com. If you want to see it go here : http://www.enginegeeks.com/viewtopic.php?f=2&t=3

It's not the motor mounts and a transmission flush won't do the trick. These transmissions **** HARD!

Nov 09, 2009 | 2005 Nissan Altima

1 Answer

Should I try to adjust IAC? I have an 1986 Buick Park Ave with 3.8 V6 engine in good condition, had been running fine. I installed (2)new Idle Air Controls,IAC, as discribed in repair manual. But engine...


U are telling me what you did as far as a repair goes but you are not clearly stating the symptoms or the actual problem, please explain what is going on here and when it happens, cold engine etc, as much detail as possible, and you should never adjust the idle speed, have u cleaned the throttle valve and the upper intake?

Nov 04, 2009 | 1986 Buick Regal

2 Answers

1986 Honda Accord DX - too high idle on cold start


1986-1989 Honda Accord with Carburetor have a very bad habit that is little known even by most mechanics but easily fixed at home. The vacuum port on the choke opener that is connected to the intake manifold and both vacuum ports on the fast idle unloader get plugged up with nasty hard carbon almost as hard as metal. When this happens the choke sticks closed and the idle sticks on fast idle when the engine is cold and nobody can figure out why. All you have to do is attach a small drill bit to the end of a flexible socket-driver extension and put it in a variable speed drill that will let you run it real slow and carefully drill out the vacuum ports that are plugged. After they are nice and clean use a vacuum pump tester to make sure the choke opener and fast idle unloader are working before putting it all back together. It's amazing how much better the car runs after cleaning out those ports.

Jun 14, 2009 | 1986 Honda Accord

1 Answer

Chevrolet sprint 1986 idling high trying to find the


If the vehicle is a carborated engine, you would find your vehicles throttle body where the linkage connects for your acceleration. Most engines then have the idle screw very close to this linkage. Though from what little photo's I have seen of the vehicles engine compartment via google images. I unfortunately can not direct you as to where the throttle body on the engine is located.

Apr 14, 2009 | 1986 Chevrolet Sprint

1 Answer

Too fast idle running speed.


Typical idle for this motor is right around the amount you have described. Check to see if any check engine lights are on, or if the ABS light is on. A typical issue with this motor is the OVP relay that when not operating properly causes the engine to rev much too high (~1500-2000). Also do your revs drop significantly when you put the car into gear? If not then there really isnt an issue. When the motor is idling too high and you stick it into gear the car will typically lurch really hard.

Jan 19, 2009 | 1986 Mercedes-Benz S-Class

1 Answer

Only got 1st gear and reverse (Automatic Transmission Problems)


when was last transmission service done? and that means changing the transmission fluid, and the filter and also have someone check the transmission linkage adjustment and this normally shows up when it is hard to change gears and also check the transmission fluid level

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