Stumble while engine is cold (1 Viewer)

[malottki]

My engine idles bad after taking off first thing. Runs good while driving but when I come to a stop it start to stumble between 250-450 rpm. Once the engine heats up it is fine.

Any thoughts. I have been reading some threads on cold start injector. Wouldn't think this is what it would be but I am unsure.

Thanks guys.

 

[Frankencruiser]

Does it do that right away? Does it ever idle at a higher rpm? Immediately after you start the idle should be around 1200-1400 rpm.

 

[malottki]

At start up it idles about 1300-1500 rpm. Only after taking off and driving for a few then coming to a stop. does it idle low. Low enough for me to have to hit the gas to keep it going.

 

[Frankencruiser]

Cracked intake tube? Pull it off and bend it around to see.