Question about 1990 Ford F150

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Idled up extremely high. need to know how to turn it down. 5.0 engine. no cruise control

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There is no idle adjustment on these trucks, the computer controls it, or at least tries to. A very common problem is for the intake plenum gasket to leak and the extra air causes a high idle. Get a can of aerosol carb cleaner and spray it along the length of the intake, usually near the back, you'll find a spot where the idle changes a lot. This will confirm the gasket leak. You will need an extra long t40 torx head driver to remove one of the center plenum bolts that's only accessible through the top of the plenum.

Posted on Aug 24, 2010

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Gas pedal gets stuck and keeps the car going cant stop without turning the car off


dont drive it. find the cause and fix it now.
Hot and cold engine or BOTH>?
1995 Tracker, no tranny , no 4wd , on engine options stated.
Exact high RPM in neutral, not stated...... 1500 is normal cold.
keeps going in Neutral. (nah , you have 5 ways to stop any car.
key, hand brake, foot brake and neutral. and with 4wd, 1 more neutral.
keep that in mind driving any car.
this car has up to 3 throttle cables that can stick. and more!

1: floor mats hit the pedal>? ala. Toyota style (lawsuits)
2: the three cables are, throttle. , cruise and A/T transmission kick down cable. if car is M/T and no cruise it has 1 cable.
so disconnect it, throttle fixed? (disconn,. 1 by 1, bingo?

no cure?, then its not the pedal , you meant just high idle.
yes, replace the cable or bad parts three.
ok say its not the cables.. (tests proved that)
the 95 came with 2 engines, 8valves and 16valves,
they work differently (8v love so race, 16v loves to stall)

1: ISC Stuck open, common.
2: 8v, any air leaks at all , will cause super high idle speeds.
3: throttle valve in the throttle body is stuckopen (gunk) or the return spring broken (very very rare the latter,in fact never heard of one breaking)
4: IAC (thermal idle control stuck open ,(my 97 was). and lots more.
5: on the 16v it takes 2 failures. to make high idle.
gross rich running engine (cold engine its normal) and any air leak
once hot the engine can not race unless there is huge overfueling
and an air leak.
6: the 8v has this device on the side of the throttle body.
called a dash pot. its just a fast idle vacuum servo.
if stuck open the engine will scream full time....
7: ECU stuck in limphome, can cause too high idle speeds.

we need to know which engine
http://www.fixkick.com/find-parts.html
8v or 16v first.
then does the idle race hot or cold or both (engine temperatures)
if it races , then how fast?, RPM the dash tachometer tells you that.

it can be as simple as a 50cent hose cracked.
to a dead ISC. (idle speed control) IAC is thermal idle air controller.
the IAC must be closed on a hot engine,
if the the engine never gets hot,it will scream full time.

Feb 13, 2014 | 1995 Geo Tracker

1 Answer

2001 dodge dakota sport with 2.5 engine idles high when I start it up, continues idling high, when pushing clutch in to change gears it idles extremely high


Does it do it if you disconnect the idle air control valve ?
You need to know if its a vac leak or if the computer is making the valve open too far.

Feb 09, 2014 | 2001 Dodge Dakota

1 Answer

Idle air control valve


Have the fault code read as it may be a throttle position sensor or idle speed sensor that is at fault.

Sep 28, 2013 | 1999 Ford Escort

1 Answer

Car idles very high when sitting in neutril; also when the cruise is set it speeds up on its on


You have a vacuum problem!
Cruise typically operates off vacuum and or electric, inspect extremely thoroughly and completely all vacuum lines.
If you have a check engine light on, get the codes read, most auto parts stores will do a scan for free, it may reveal the source of the problem..
Best regards
Ck

Oct 22, 2011 | 1998 Mercury Sable

2 Answers

When I slow down to a complete stop, my 1999 chrysler sebring cuts off. Can you help me?


Possibly a transmission issue. The transmission has a "lockup" mode, where a clutch connects the engine directly to the transmission at cruising speeds. It is then supposed to unlock at lower speeds and for stopping. If it doesn't unlock, the car will stall at a stop. Try putting it into neutral (carefullly, so you don't go into reverse) as you slow down, if it doesn't stall out, it is most likely the transmission lockup mechanism.

If it stalls in neutral it is an engine issue. Bad idle control, bad ignition (it's easier to fire at high speed), bad fuel injector, bad air flow/pressure sensor... and more possibilities.

Feb 02, 2010 | 1999 Chrysler Sebring

2 Answers

2003 4 cylinder 5-speed tiburon,engine just


This generally indicates a vaccumn leak, or sticking idle air control valve.

Jun 20, 2009 | 2003 Hyundai Tiburon

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