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I have a 1998 toyota corolla fuel injection. when starting in the morning it does not idle until engine is hot.

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This is a well known problem with your engine. The idle is controlled by the Idle Air Control Valve (IAC), which is driven by a little motor controlled by the car's computer. The valve is dirty and sticky. Once cleaned it should work fine. There is a lot on the Net about it, just Google Corolla Idle Air Control Valve

Posted on Oct 21, 2013


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Posted on Jan 02, 2017


SOURCE: 1998 Toyota seems like its boggin down when starting

I had this problem recently with my 98 camy LE. Just replace or clean the idle air control valve

Posted on Aug 25, 2008

  • 175 Answers

SOURCE: Corolla repair manual

can y tell me what enigne size ?

Posted on Mar 23, 2009

  • 80 Answers

SOURCE: Rough Idling, start-up early morning, until engine heats-up

this may be a sticking air flue meter take a matchstick .and push it into the hose this will let more air in if this works change the air flue meter

Posted on May 04, 2009

  • 2 Answers

SOURCE: 1986 toyota corolla 2E engine high fuel consumption

why does my normal rpm always bug down when the engine start?and when I started to use the air con, the rpm was playing. It doesnt go on a certain point. it always range at 800rpm then it will down to 700. what am I might do to solve this probem?

Posted on Mar 13, 2010

SOURCE: Toyota 1999 Corolla,low idle,my corolla idles at

adjust the accelerator cable.

Posted on Mar 15, 2010

Testimonial: "i thought the idle was ecu controlled,but i see what your saying,ajust cable allen screw with locknut to bring up revs.thanks"

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How many torque must be pot on a crankshaft bolt of a 5A engine

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Toyota corolla 1998 not moving in the morning

i crank car.
it starts, engine idles at 1000 to 1500 rpm cold. good
it don't misfire or shake (tuneups work)
i shift in to gear. Drive. or reverse.. car dont move
i step on gas, and RPM goes way high and car will not move.
there is my guess. correct my errors.
or post yours.

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2001 Toyota corolla idles fine but when gas pedal is depressed bogs and pulses any ideas

Could be a couple things,if its fuel injected could be clogged fuel injecters.It also could be a dirty fuel filter I suggest u start with a tune up and go from there.

Oct 05, 2013 | 2001 Toyota Corolla

1 Answer

When i start my toyota corolla small body in the morning, the idling goes up to 2000rpm, why is that so?

It is quite common for most cars to have an increased rev range when a engine is started from cold, as the temperature increases the revs will drop down.
Depending on the age of the car has a lot to do with it also, as older cars used an auto choke system until a warmer temperature was attained.
More modern cars don't neccessarily need extreme higher revs, but still operate with a thermostatic controller, that regulates the fuel flow via the fuel injection system.
before you do anything, consider
1/ You have to know also what rev range does the car operate at when its been running for a while, eg when its warm and idling does it rev at 600,800,1000.
2/ Make sure you don't have your air conditioner on when starting, as this increases revs also.
3/ How long is the increased revs lasting.
4/ Is this car a carburated model or fuel injection
5/ have a visual and check that there are no small vacuum pipes that have come off anywhere around the intake area of the motor. (Intake area can be found where you accelorator cable ends up.
6/ failing that when your car goes for its next service, bring this problem to the mechanics attention.
it can be difficult to diagnose problems like these unless your looking at the engine.

I hope this has helped somewhat

I hope this

Feb 01, 2011 | Toyota Corolla Cars & Trucks

1 Answer

I got a 1998 model TOYOTA TAZZ 130i whe i start it it would not want to idle?

If it is a Carburettor model you need to check if the earth wire to the carb is connected, and if the idling valve on the carb is working and getting power.Also check if the idling jet is not blocked in the carb.If it is fuel injection make sure all the wire,s for the fuel injection system is connected especially the earth wire's. Also check that the throttle body is clean.

Nov 19, 2010 | 1998 Toyota Corolla

1 Answer

My 1984 toyota corolla ran out of gas now it wont idle

Quick explanation of your fuel system:

An automotive fuel system consists of everything between the fuel tank and the carburetor or fuel injection unit. This includes the tank itself, all the lines, one or more fuel filters, a fuel pump (mechanical, electric, or both), and the carburetor or fuel injection unit.
With the exception of the carburetor or fuel injection unit, the fuel system is quite simple in operation. Fuel is drawn or pumped from the tank through the fuel line by the fuel pump, which forces it through the fuel filter, and from there to the carburetor/injection unit where it is distributed to the cylinders.

So with that info...try first to clean your spark plugs.
Next, replace your fuel filter.
After that, depending on a carburetor/fuel injection, try an additive that cleans the injectors. For the carburetor, try a half of can of what is called "Seafoam". It comes in a metal can available everywhere, including Walmart. It is worth the $6-8 and also will "dry" out your fuel from water. Very good product.

After that, get back to us and let us know how your Toyota is running.

Oct 12, 2009 | 1984 Toyota Corolla

1 Answer

Hard to start in morning

if it is carburated you need to adjust the fast idel and the choke if it is fuel injected try checking the temp on the coolant temp sensor with a scanner the temp might be reading wrong if it is differant than ambiant temp in the morning change sensor

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I couldn't find Estima. Having problem with my 1992Toyota Estima

try to check your fuel pump going to your injection pump if it is working.

Apr 20, 2009 | 1992 Toyota Corolla

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1994 Toyota Corolla hard to start when warm

does it have a cold start injector seperate from the other injectors usually on the upper intake somewhere with a fuel line going to it

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