Hi,

 

Gonna hook up a Conzult and sort out my intermintent idling problem. What I need to know is exactly what sensors affect the idle so I can see what they are doing.

 

IAA unit

Air regulator

Temp sensor

TPS

Hi,

 

Gonna hook up a Conzult and sort out my intermintent idling problem. What I need to know is exactly what sensors affect the idle so I can see what they are doing.

 

IAA unit

Air regulator

Temp sensor

TPS

 

Hi Vijay,

 

What problems are you having?

 

You can switch the aac valve to manual operation and operate it using the scroll adjustment from 0% to 100%. You should notice the idle increase the higher the aac value.

 

Make sure the TPS is set at 0.44v and that the idle switch is on. The idle switch should turn off when you touch the throttle.

 

Temperature sensor should be reading around 80c when at normal operating temperature. Try moving the connector to see if a bad connection changes the temperature reading.

 

Aside of the consult tests, try the usual cleaning of the throttle bodies and efi harness connectors.

 

Steve

iwas going to say check for boost leaks,but as vijay is king boost leak detector seller :D im sure its been done already

 

not often needed to but if you have problems with the IAA unit

Idle Air Regulator (IAR).IAA This valve lives on the the intake manifold, above the passenger-side Its temperature sensitive open when cold, closed when hot. That makes the car idle higher when it's warming up,cleaning of the yellow and blue connectors at the back of the iaa unit may help

 

im sure theres an article on TT.net on removing and cleaning IAA unit,might be worth a shout if all else fails

Hello guys,

 

The problem is the usual sudden high idle. I just wanted to hook up the Conzult and see what the senors were doing when the idle shot up :)

 

Vijay

have you tried looking for a vacum leak, that is what was wrong with my erratic idle.

Most likely when it's sudden rise like that is the closed position switch.

closed position switch???

closed position switch???

 

 

TPS.

 

Check it is set at 0.44v at idle at normal operating temperature.

 

Above this setting, the ecu thinks the idle switch is off and increases the rpm accordingly.

 

Steve

Cheers Steve, know what you guys mean now :)

 

Vijay