Low Idle Speed

[cg084]

Hi,

 

I have a Jap N/A Supe. All is standard factory spec.

 

I have a problem with the engine idle. All the time the idle is constant. Does not appear to miss a beat.

 

Most of the time once the engine is warmed up the idle appears to be around 4-500 RPM just about stalling rattles the whole car when like this. Sometimes it will actually stall. After a long drive it may work things out and runn at around 6-800 RPM which is fine. Most of my driving is about 30 miles to work and then the 30 miles home. Never realy go anywhere else.

 

From starting the engine from cold it will idle at about 1400-1500RPM which i believe is ok. but when the choke goes off to idle the engine normally 95% of the time it idles too low.

 

I have tried to see if this is weather related but there is no visible link to wet weather, cold weather or even warm weather. Mostly seems to cut out after i have gone about 1 mile from home after first starting the car.

 

Allways stalls when i have left the house rather than when i leave from work at the end of the day.

 

I have had the intake air temperature sensor replaced and there was no difference.

 

The only thing i have noticed is that it is becomming more common from week to week for the idle to go low.

 

I have looked at other threads and nothing really seems to stand out to me. Similar probs on other cars and mostly seems to be an idle control valve.

 

So if you know of any tests for this that would be great. Also should it be displayed on the diagnostics. My local garage does the diagnostics for free. Saves me and my speaker wire.

 

If anyone has and suggestions tips tests. Anything really it is greatly appreciated.

 

Cheers Craig.

[FaithStalker]

umm i had this problem when i first got my Jspec TT,

the garage flushed the water/cooling systems and refilled,

all seemed to be ok after that.