Question about 1990 Toyota Celica

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Engine races. The engine idles at just over 1000rpms. the throttle is at its lowest setting.

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Hi

it sounds like the MAF sensor, or air mass sensor same thing. also check for leaks in any air pipes, look for rips or tears in the pipes common on a car this age.

Regards

Dan

Posted on Dec 29, 2010

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How do I fix Suzuki Alto idle problem?


Two possibilities--bad coolant temp sensor (the one with two wires that speaks to the ECU) or Idle air control valve dirty/sticking.

Jul 14, 2015 | Suzuki Cars & Trucks

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Very high idle after rebuilt carburetor on Chevy 250 l6. Choke is okay, no fuel leaks. Engine races at about 3000 rpm


Sounds to me like the throttle plate is too far open at idle. Look for something hanging up and holding the throttle more open that it should be-like the choke like the auto choke or the fast idle cam screw set to far in. Look up the fast idle speed adjust procedure in the books and check out how yours is set up. Also, if the carb was all the way apart the throttle plate may be off center on the throttle plate shaft causing extra air to bypass the throttle plate. Good luck.

Jan 03, 2015 | Cars & Trucks

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WHAT WOULD MAKE MY CAR ENGINE WANT TO RACE FORWARD


A few possibilities:
  1. Defective throttle position sensor (TPS);
  2. Bad idle bypass circuit or idle circuit solenoid;
  3. Cracked intake manifold, throttle body assembly, or bad throttle body gasket (most likely);
  4. Serious vacuum leak somewhere.

Aug 02, 2014 | 2002 Buick LeSabre

1 Answer

Rpm goes 5000 after running a few miles


OMG, its got the Toyota Disease. next is Medial and lawyers.

i think you mean to post with foot off the the throttle, in say DRIVE
the engine races to 5000 RPM , total idle failure,
bad idle controls,
bad idle can happen on any car and can be caused by 2 things.
and is dangerous, (you can cut the key to stop any engine)

1: the throttle is really stuck. check the linkage end to end.
2: the IDLE control valve, ISC is stuck open. clean or replace it.

the cars ECU does all it can to prevent this, but can not help
if there are hard failures. ISC or throttle linkages failure.
there is a throttle return spring too, that can break (very rare)
the throttle bore can get so dirty that it can stick open.
on some cars, NO ENGINE STATE
Speed density engines, (MAP) will race for ANY VACUUM air leaks
to the intake plenum , (cracked hoses, etc)

Jun 14, 2014 | 1995 Cadillac Eldorado

1 Answer

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

My daughter has an '88 F250 with the 460. Recently the engine races when starting and running, never going back to idle. Check Eng light is on


Have them spray (lightly) starting fluid around the intake with the truck running. If there is a leak the engine will idle up even more. They may also just need to adjust the throttle linkage.

Oct 12, 2012 | 1988 Ford F 250

1 Answer

Engine racing, will not idle. Not a stuck throotle


the trottle position sensor is the most likely problem,this is fairly common.if that is not the case the you likely need to repair leeks in the intake,base of throttlebody usually.

Sep 30, 2009 | 1999 Cadillac Eldorado

1 Answer

I have a 01 dodge caravan.when it warms up it idles between 500 to 1000rpms.also when at a stop.it wants to take off.anyone know what my problem could be


idling too high .check for vacuum leak at throttle body gasket.make sure the throttle cable is not binding .or idle speed control malfunction.

Apr 22, 2009 | 2001 Dodge Caravan

1 Answer

Jag XJ6 revs are too high


If you have replaced the Throttle postion sensor (TPS) or have replaced the battery, sometimes the car will need an engine set up.
I had the same problem with my xj6 and I did an engine set-up and it has been fine for the last 2 years. Also with the idle doing what it did it had a very harsh shift when driving and changing gears.
The BAD news is the dealer has to perform the engine set-up using the WDS (worldwide diagnostic system) The set-up will set the kick down switch, it will calibrate and set the TPS and also perform an oxygen sensor orientation test.
With the set-up it will allow the TPS sensor to be adjusted to the correct factory specs.
Sorry you can't do this your self.
This is obviously if there is no vac leaks and the throttle butterfly is set to 2 thousands of an inch. (gap on the side when closed throttle) check with a feeler guage.
JPTCAT

Jan 20, 2009 | 1995 Jaguar XJ6

1 Answer

03 check engine light


try cleaning the throttle body really well to see if that dosent help.you may have to take if off the truck to get it really clean but that sounds like what you may need to do

Jan 08, 2009 | 2003 Chevrolet Silverado 1500

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