answersLogoWhite

0


Best Answer

it could be a iac valve or a vac leak start with vac leak search if all vacum lines are right then turn to your iac idal air controle

User Avatar

Wiki User

15y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What causes a real high Idle on 1991 4.3 ltr engine and after it warms up it still idles way to high?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What would cause a roaring sound in a 2004 Pontiac sunfire after it warms up?

what causes a roaring sound in a 2004 pontiac sunfire after it warms up? it runs great and idles great and quiet except for this.Anonymously


Why does your auto transmission stop moving the car after it warms up if you turn off engine and restart it moves about 300 to 400 feet then stops again?

It is because of how fast the car idles. When you start the car it is idling high and when the engine warms up it slows the idle to about 650 RPMs and the torque converter in your transmission is slipping and not moving you forward at that low an RPM. what causes the torque converter to slip? CAn it be a sensor problem?


Why would the engine ideal high on a 96ford escort?

air idle controller solonoid very simple i just unlugged mine and it idles like its carburated till it warms up


I have a 2002 Chevy Malibu 3.1 engine what causes the transmission to clunk from park to drive or reverse when it warms up. I already replaced the trans but it still does the same?

could be bad mounts on either the tranny or engine?


On a 1987 Mazda b2200 w 1930cc engine starts warms up and idles ok choke seems to operate fast after a block and a half will stall out no pedal response what could be wrong?

Try checking out your catalytic converter. it may be plugged which causes you engine to die after you drive it for a bit. try checking your gas for water that may be the problem also chek your fuel filter it may be plugged.


What is causing the high idle sound when you start your car?

Cars often idle fast when you start them up. The automatic choke will make the car idles fast for a while then the idle speed will slow down, once the engine warms up.


What causes your engine rpm to raise when hot?

When your motor warms up your oil, gasoline, and transmission fluid; it helps your motor run free


What causes oil light to flicker and idle to flutter between 600 and 1000 rpm on a 1994 sable with 3.8 engine AFTER it warms up?

1) the engine oil level is low 2) the engine oil is old - making it very thin, especially after the engine warms up. Likely the oil light is doing its job and calling your attention to the level and condition of the engine oil.


Why does your 2001 ranger xlt sound like a wind machine when you first start it It is fine when you drive a block or so?

because the rangers come with mechanical cooling fans so when the engine is cold it idles faster so the fan will run faster as the engine warms up the idle speed slows.


What causes whining when turning only when engine warms up on a 2006 Acura V6 with 112000 miles?

Could be a tired power steering pump.


What causes a loud pitch noise in the engine compartment during cold days when the engine is first started and then vanishes after engine warms up 1998 Deville?

Sounds like a fan belt. Have it checked. or an sai motor


89 accord lxi fuel injected when car is cold idles 1200 then warms up idles at 800 to 2500 than after an hour it will idle at 1200 all in park never idles erratic in gear -3 mpg?

If a 1989 Honda Accord is experiencing idle issues the idle air control valve should be checked. A malfunctioning valve will cause the engine to run richer to compensate for less air and cause the car to have bad fuel economy.