Idoling Fault On Gear Change Please Help

[shelbournes]

I really help someone can help me

I have a Galaxy N reg 2.0i DOHC galaxy that has developed a fault

When you change down a gear especially 3rd to 2nd the engine revs will drop and

the engine will sometimes stall

I have already spent

[seatkid]

Possibly idol :lol: control valve

[Dave-G]

:lol: puleese stop shouting

 

:o I've got an idle control.....AKA automatic :lol:

[seatkid]

FORD TIS...Item C in the diagram - might be gummed up

 

Idle Air Control Valve IAC Valve

 

The idle air control valve (IAC valve) is an electronically controlled solenoid valve which allows a flow of air to bypass the throttle plate. Engine speed can, therefore, be maintained irrespective of load.

 

The PCM determines engine speed from the PIP signal and this is compared with ECT sensor information, throttle position sensor (TP sensor) information and mass air flow sensor (MAF sensor) information to enable the PCM to calculate the amount of valve movement required. The IAC valve is controlled by grounding pulses from the PCM, the length of which determines the position of the valve.