Question about 1996 Toyota Corolla

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Idling high car ides good when cold but idles fast when warmed up

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Are you using aircon? if yes observe if it beahaves OK if the aircon is OFF. Then if you turn the aircon ON does it go up? if so, you may have no freon on the system because the engine does not have a load and the aircon system is idle upping your engine.

Posted on Nov 09, 2008

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There may dirt or rust in idle air passes
Service & adjust the Idle speed control valve & throttle position sensor.

Posted on Nov 02, 2008

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1 Answer

1996 Jeep cold start heater location


It likely has EFI (electronic fuel injection) and an idle air control valve that regulate idle speed. They can get gummed and fail to have a fast idle when cold, or get stuck the other way, and have a too fast idle all the or regularly take its time slowing down after you take your foot off the gas. An engine temp sensor can also cause a lingering high idle if it reports the engine as still being cold after warm up.

Aug 15, 2014 | 1996 Jeep Grand Cherokee

1 Answer

Engine idles high cold or warm. I have checked the crank key-way and all is good.


too fast idle. it is too high right?
but how high? the 4wd model has
a dash tachometer. post that reading.
this has long list of cause.
The hot engine ,idles at 800 rpm A/C off.
the ECU controls that, if it dont idle a 800 hot.
then , : (im skipping cold due to harder to diagose and rpms not stated)

1; Is the coolant temp,
180F min, to 200F max , is it?
if not all EFI cars fail idle her.e.
2: next, is IAC or ISC failure.
the IAC must only be open cold.
the ISC is electric and operates under ECU control
and a 2 fast idle means the ISC has lost control.
it can lose control any time you have air leaks in the intake.
illegal.
the main page on idle is here
http://www.fixkick.com/IDLE-AIR/idle-index-home.html

the 98 specific page is here26 ways to fail. here.
http://www.fixkick.com/IDLE-AIR/16v-idle.html

even a loss distributor base clamp (bad service)
can cause idle to fail.
1: ISC(electric) dirty, clean it.?
2: bad thermostat.
3: IAC (a pure thermo device) stuck open. (my 96 was)

Sep 12, 2013 | 1998 Suzuki Sidekick

1 Answer

My 1994 samurai idles really high when I first crank it, but later slow down. is there anyting I can do to ?


From a cold start my sami idles really fast, but as I drive it and the engine warms up it will idle correctly. Is there a way to make it idle slower from a cold start?
what engine ? 1.3 L
carb or EFI? (94 was first year of efi, and many have been converted this old)
but the answer is the same , that is normal.
on car its a fast ilde cam on the carb.
in EFI its on the software and in the IAC thermal valve.

Mar 29, 2013 | 1994 Suzuki Samurai

1 Answer

Car idles high


when it is cold out there is a sensor on the throttle body that has the rpms to go high so the engine warms up fast then it suppose to drop back to nornal. the sensor is a idle air control valve. here is my linkhttps://www.facebook.com/TedsRepairs

Nov 12, 2012 | Cars & Trucks

1 Answer

Bad idle


chk/test yr plugs also. If it starts to break down then chk soliniod & coil as u may be getting the start of a bigger problem. yr symptoms r showing signs of an elecrical problem. rough warm ups r the signs. c/be choke sensor also causing roughness..

Sep 04, 2012 | Cars & Trucks

1 Answer

What kind of carb does the 76 c10 4x4 come with need to adjust


mcdevito75 here, The fast idle is needed when the engine is cold to make the air and fuel mixture rich to keep the engine running while cold, the carb. choke doew this with a bi-metalic spring in that balck round box on the side of the carb, a screw also hepls keep the choke closed until warm up, this screw can be adjusted tpo control how tight it holds the choke cloesed, here"s how to adjust this screw to slow fast idle speed, Locate on the carb, where the gas pedal connects, have a friend operate the gas pedal with the engine off, once you locate the linkage, you"ll also see 2 screws with springs around them, 1 is for fast idle the other for regular idle, you want the fast idle screw, notice this screw will lay against and Half moon shaped tab, while the other screw lays against a shaft, you need the screw that lays against the half moon shaped tab. Start the engine and step on the gas pedal slightly and relaease, at the screw that lays against this half moon, simply turn it counter clockwise or toward you just 1 2 or 3 turns very slowly, you'll hear the fast idle come down but you don"t want the fast idle to low, listen to the engine very carefully, slow it down just a bit, it should still race though but not out of control. Of course for a full carb, adjustment the shop should handle that., but this info will help.

Mar 29, 2010 | 1978 Chevrolet C1500

1 Answer

89 dodge shadow. hard start. normal idle cold, fast idle warm. sometimes it wont start until i hear fuel pump activate.


Hello,
The car may be hard to start because it may need a normal tune-up. If the spark plugs are pretty used, they will slowly stop burning as much fuel because the spark slowly gets lesser and lesser. On a cold day the fuel is harder to ignite with a small amount of spark.
Normal idle when its cold means that your cars idle is probably too high. If you lower the idle, the choke on a cold day will keep the idle a little higher until the motor warms and then it will kick back off. If the idle is too high, it will run very rich, smothering itself with fuel, and causing the idle to stay low. When the car warms, its creating better spark when its warm, and with the idle being too high its running at a fast idle.
The car wont start sometimes can be the cause of a few things. If the ground is bad on the fuel pump, it wont make a good connection sometimes for when you turn the key on, the fuel pump dont pump the fuel to the engine. Another one can be that your accessory switch can be loose going to the fuel pump. I think its your ground though. Good luck! Hope this helps.
Have a nice day. -Steve

Dec 06, 2009 | 1989 Dodge Shadow

2 Answers

Engine will start at very low idle, sometimes killing, then may fast idle, then low idle, back and forth. What may cause this?


check and make sure air filter is ok, and there are no restrictions in hose to throttle body, check iac (idle air control.

Oct 01, 2009 | 1990 Chevrolet Corsica

1 Answer

Idle out of control.


check all your vacuum hoses and the throttle body itself for a vacuum leaks if the hoses replace as nessasary if to check for throttle body get can of carb cleaner and spray around base of throttle body and sides not in it if idle raises you have a vacuum leak goto a good parts store and ask for a rebuild kit don't goto auto zone or advance they don't carry them

Apr 22, 2009 | Chevrolet Sportvan Cars & Trucks

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