Idle modulation only when motor is hot?
 

I don't know if by mentioning that my 81 911 SC only starts the engine idle modulation dance when the motor is fully warmed up if this might lend itself to being more easily diagnosed as to the friggin problem??? Other wise it runs fine. I have a really strong motor and up and till it gets fully warmed up it idles smooth if not slightly high at 1000 rpms. Any suggestions or thoughts? Many Thanks!

Well, eliminating all vacuum related problems, I would lean it out a little.

Assuming your O2 is connected and functioning properly.

I agree. Needs to be leaned out.

Thanks Guys!
 

I appreciate your feed back. Just for being such nice guys, I am sending you a picture of the baddest ass 81 911 SC Targa in captivity!!! http://forums.pelicanparts.com/uploa...1387587563.jpg

Maybe the baddest-ass 81 Targa on your friggin tiny block.

Here is the KING east of the Mississippi.

As Vanilla Ice would say (yeah, I'm that old):

Word to your Mother.

http://forums.pelicanparts.com/uploa...1387592671.jpg

Word! No you diiidddaaaannnttt.

Yep that's a beauty!
 

But does it run like a raped Ape? Mine will stop on a dime and give you five cents change!!

Pffffffft - stock but with Boxster brakes - 217mph to zero in 112 feet.

If I'm lyin' I'm dyin' :D

Jesus, my left arm is numb......WTF.......I'll get back to you guys................