Question about 1993 Harley Davidson FLSTF Fat boy

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Revs dont drop

Im riding a bad boy 1995 im having trouble with the idling when i let go of the throttle it takes 5 or 10 seconds for the revs to go back to to normal idling this makes it difficult to to change gears while riding revs dont drop when changing gears could it be the seals in the manifold i hope some can help

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The thottle slide can be sticking, a rich mizture gives similar symtoms

Posted on Jul 05, 2010

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My mazda mx5 <1600cc>at normal operating temperature idles at 800 revs,after about 20 seconds the revs drop to 400 revs,after 5 seconds they return to 800 revs,this problem is continuous at idle.This...


Hi,
Sounds like a tune up is in order.
You can mask the problem by changing the fuel filter and spark plugs.
Also there is a small adjustment screw at the throttle linkage. Open the hood and stand close to the battery. Have someone rev the engine and look for the circle or half circle looking spring like mechanism.This is your throttle. Take a small screwdriver or other wrench [ some have different adjustment screws] and simply turn the screw you will see as the adjuster in about 1.4 turn until you are happy with the idle.

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Hi, I have a 1999 Chico/Citi Golf. The revs stay above 1000 and do not want to drop, I do not even have to pull the choke out. How do I get my revs to drop back to 1000? It use to Idle just below 1000,...


Check that the choke accelerated idle cam is not stuck. Check that the throttle cable has not dislodged and the outer casing is riding on the bracket. Check that the throttle linkages are free and the throttle returns to the idle adjustment stop. If all these are correct, adjust the idle adjustment to obtain the correct idle speed. 700 - 800 rpm is about the right speed.

May 15, 2011 | Volkswagen Golf Cars & Trucks

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When engaging clutch to shift gears engine will rev to about 3k, it will not drop when foot is off the accelerator. when stopped it takes a few seconds to drop to idle speed.


Your idle air controller (IAC) is hanging up and it needs to be removed and cleaned-remove the throttle body and clean everything, it makes taking the IAC out to clean much easier. IF you don't have a check engine light, you will soon. Cleaning the throttle body, the IAC and checking the throttle position sensor is very easy to do on these engines, I have one with 178,000 miles on it.

Jan 26, 2011 | Saturn SC1 Cars & Trucks

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Hi i have a xlh 1200 sportster 1989 /1990 its fitted with a edlebrock carb quick silver 2 ,right throtle working ok ie you pull back let go it all snaps back same when bike is on tick over but when im out...


If the throttle is "snapping" closed like it should but the RPM's are not coming down, it sounds like you might have a vacuum leak somewhere. I've seen the advertisements for this system but I have no experience working on it. Evidently, this carburetor has two throats on it. Use a feeler gauge and check the gap at the bottom or top of one side of the unit and then check the other side and see how close they are. I would assume that even though there are two throats, the throttle plates are controlled by one shaft and that shaft is controlled by the throttle and idle cables. If the two throttle plates are seperately adjustable, then they may not be adjsuted correctly. Go to Edelbrock's website and see if they've got a technical assistance phone number or whatever. Send them an e-mail. They'll know more about it than I would.

Good Luck
Steve

Oct 21, 2010 | Harley Davidson XL 1200 S Sportster Sport...

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When idle the engine revs up and down by its self


my 1990 toyota starlet idles fine its when i put my foot on the throttle it revs up then drops down by itself even when my foot is to the floor

Mar 30, 2010 | 1999 Mercury Cougar

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When im riding and i shift into second and get it reving up high getting ready to shift to third i'll pull the clutch in but the engine does rev back down it keeps the high revs for like 4 seconds then...


Check that there is some free play in the throttle. When you twist the grip the first bit of movement should only be taking the slack out of the cable, in other words, you need about 1/16th of a turn of the grip before the throttle is actuated.
Also make sure the cable is routed properly - and check for any air leakage between the carburetor and the engine. With the engine running, if you spray WD-40 around the inlet manifold and it causes the idle speed to change, then there's an air leak.

Nov 09, 2009 | 2005 Honda CRF 100 F

1 Answer

Car dies at idle


I think a top end cleaning would be of value to you.

1. Remove inlet hose and clean with carb spray
2. Start car and rev up to about 2,000 rpm and feed more carb spray for a moment or two. It may not even want to run without a fight when you are doing this part.
3. With engine running, open throttle (wide open throttle) and hold hand over inlet and then take your hand away and allow it to flow again and release the throttle. Don't over rev it, you just want to create a vacuum state in the intake that will remove carbons, etc. Do this open throttle and cork it with your hand about 6-8 times. Then reassemble anything you took apart.

This trick removes stubborn gunk in the intake by loosening it with carb spray first and creating a vacuum to dislodge it. Expect a little black smoke when doing this trick.

Jun 02, 2009 | 1995 Ford Crown Victoria

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