Very High Idle in vs berlina

[hustla]

Hi guys a mate of mine has a series 2 vs berlina wich we did a manual conversion on about 12months ago we put in a t5 box and series 1 ecu and loom had no probs till a couple of weeks ago. now the engine is idleing at around 2000rpm. we have replaced o2 sensors, coolant temp sensor, throttle position sensor, and the idle air control. even tried a complete throttle body and checked for vacuum leaks but still have the same problem. any help is greatly appreciatted.

[Rolla_Rolla']

Throttle cable too tight ?

[hustla]

Throttle cable too tight ?

unfortunatley not we even disconected the cruise in case that was the issue

[seraphic06]

When you replaced the idle air control valve, did you remember to plug back in the electrical connector?

[hustla]

yeah all plugged in

[BowTie]

I know you tried a different throttle body
but have you checked for a sticking butterfly.

[Rolla_Rolla']

Reset the CPU ?

[hako]

Try resetting your base idle.

[hustla]

yeah guys tried all the obvious stuff even checked for vacuum leaks around the intake even check the pcv valve in the manifold

[hako]

So with the IAC disconnected, you cannot screw the idle down to about 600rpm?

[hustla]

So with the IAC disconnected, you cannot screw the idle down to about 600rpm?

no the screw didnt change a thing

[hako]

In your first post you said: "had no probs till a couple of weeks ago"
There has to be a clue there.

[hustla]

In your first post you said: "had no probs till a couple of weeks ago"
There has to be a clue there.

we have racked our brains its driving us crazy. we are now looking to try a different ecu incase the current one has an issue.

[hako]

Try disconnecting every hose that takes vacuum from the inlet manifold one at a time including the brake booster...close each one with your thumb and see what happens.

[hustla]

tried that aswell

[hako]

Are the vacuum passages to the IAC and throttle body clean and not blocked.....any chance of the IAC connector being dodgy with a wire broken......really clutching at straws now!!!

[hustla]

so are we chnged the whole throttle body with another vs and same prob even put the multimeter on the wiring for the tps and iac all is normal

[BowTie]

Would a vapour cannister purge solenoid stuck open cause it?

[hustla]

Would a vapour cannister purge solenoid stuck open cause it?

dont know but worth a try

[hako]

If air was entering the combustion chambers via a leaking vacuum hose etc, wouldn't it leave a code for weak mixture???

[moff_man]

just a quick one, but is the brakes still good or have they gottin hard, your booster could be cactus causing massive air leak

[hustla]

an update last night he took the ecu out of the kick panel and checked the wiring plugs and all good then smacked a couple of times with his hand and car was running fine last night so the hunt is now on for a series 1 manual ecu. good luck hey lol