Idling Problem

[twincam16]

I noticed the timing of my car is about 800rpm although the engine cold as i start in the morning. Previously when the engine is cold usually it idle at 1200rpm. Some times it decreased to 600rpm at normal temp and i hv to tap the gas pedal to increase rpm as the engine vibrate hard. The feels is like the auto choke is not functioning (EFI engine do not hv auto choke right?). What is happening? Plz guide.

 

[mfauzi_s]

maybe isc open circuit.

 

[levin818]

You have a clog idling valve.

 

[TRD.AE92]

I noticed the timing of my car is about 800rpm although the engine cold as i start in the morning. Previously when the engine is cold usually it idle at 1200rpm. Some times it decreased to 600rpm at normal temp and i hv to tap the gas pedal to increase rpm as the engine vibrate hard. The feels is like the auto choke is not functioning (EFI engine do not hv auto choke right?). What is happening? Plz guide.

EFI do have auto clog la....try change the whole throttle body, i worry auto clog or isvc is problem.

 

[twincam16]

besides change the throttle body, can it be clean? what is isvc?

 

[mfauzi_s]

firstly clean/ service ur iscv & check iscv 3 wire connection.

 

[hon_cs]

hope this can help. i think he is one of the forumer here. i also never DIY this before. 4A-GE 20V Enthusiast :: [DIY] How to clean 4age 20v ISCV :: March :: 2008