Idle issues during cold start

[Yano]

Hi all,
I have a B34 with D-jet system that will not idle when cold. Once the engine is completely warmed up it will idle normally. I shut the engine down and during restart the car will not idle without providing a bit of throttle for a few seconds. Is there a way to verify if the the idle control valve is working properly? Any suggestions would be greatly appreciated.

Glenn
74 Amazon Green w/M535 conversion
Vin 4335095

 

[sfdon]

What is your vacuum reading at cold idle?

 

[Simufly]

Bad idle

Aux air valve not working?

 

[restart]

Preface: my senior citizen memory may have failed me...BUT... I think the ICV rattles when powered. If you disconnect it u should here the valve rattle freely when you shake it
3 wire valve should measure 40 ohms between outside terminals, and 20 ohms between the centre and both outside terminals
2 wire measures 10 ohms between them.

As usual don't quote me:grin:

 

[sfdon]

Just clarifying- this is a D-Jet without a ICV? It should be an aux air valve?
Stock M535 cam?
Manifold pressure sensor?

 

[Yano]

Sorry for the delayed response trying to get ready to leave town.
The Vac pressure reads 37 mm Hg./15 in. Hg.
Have not had the chance to take ohm readings on the ICV, but I hear no rattling (not from the ICV anyway) there is the occasional rattling between my ears which I have been told is probably normal for me. I suspect a vacuum leak which I will investigate with a can of carb cleaner. I appreciate the info., keep it coming.

 

[sfdon]

When you get a chance- D-Jet with aux air valve?
D-Jet with manifold pressure sensor?

 

[restart]

Do people still use the correct smoke machine to test for vacuum leaks?