Help Please

[marka]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

[daktari]

Vacuum leak??? Have you checked all the vac & air hoses ?

[marka]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

yes ive checked all the vacum system and inlet gaskets and all ok, its fine when cold but when its warming up the revs start to rise im thinking throttle body nackered what do you think??

[mujaddid]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

yes ive checked all the vacum system and inlet gaskets and all ok, its fine when cold but when its warming up the revs start to rise im thinking throttle body nackered what do you think??

Have you removed the air pipe and given the throttle body a good clean out with some decent carb cleaner spray?

[mujaddid]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

yes ive checked all the vacum system and inlet gaskets and all ok, its fine when cold but when its warming up the revs start to rise im thinking throttle body nackered what do you think??

Have you removed the air pipe and given the throttle body a good clean out with some decent carb cleaner spray?

[daktari]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

yes ive checked all the vacum system and inlet gaskets and all ok, its fine when cold but when its warming up the revs start to rise im thinking throttle body nackered what do you think??

It could be the throttle valve spindle is worn causing the valve not to seat properly But.........

I`m thinking water temp sensor may be nadgered. It sends a signal to the ECU to weaken the mixture as the engine reaches operating temp. If it`s not working the car will run rich.

Also as mujaddid suggests. Cleaning any gunge out of the AFM and throttle body may help. Give it a go. Cheaper than a new throttle body.

[marka]

anyone outthere now why my celica at200 is idle'ing @ 1200 rpm when hot ive changed the idle valve sensor, the ecu temp sensor and it is still doing it

thanks mark

yes ive checked all the vacum system and inlet gaskets and all ok, its fine when cold but when its warming up the revs start to rise im thinking throttle body nackered what do you think??

It could be the throttle valve spindle is worn causing the valve not to seat properly But.........

I`m thinking water temp sensor may be nadgered. It sends a signal to the ECU to weaken the mixture as the engine reaches operating temp. If it`s not working the car will run rich.

Also as mujaddid suggests. Cleaning any gunge out of the AFM and throttle body may help. Give it a go. Cheaper than a new throttle body.

thanks guys, ive changed the ecu temp sensor tonight and it didnt do a thing still the same!!! im going to strip the throttle body and clean it, if it is the throttle valve spindle is this a replacable part as ive never owned a toyota before?

thanks mark

[daktari]

Just a thought before you go any further. Have you tried disconnecting the electrical connector to the idle speed control (ISC) valve - It`s screwed onto the throttle body with four screws. If there`s no difference when thats disconnected it could be that or its gasket thats at fault.

Not sure if the throttle valve spindle is replaceable or not. It is on a lot of cars.