my 460 has a regular and slight surge at idle. does not seem to matter how i adjust the injectors it does not go away. does this sound like an intake or base of the throttle body leak. any other suggestions?

 

I would say it is the IAC, but I don't think that your set-up has one.
Does this set-up use an EGR valve? Could it be slightly stuck open?
It could be a vacuum leak and the O2 sensor is contantly correcting the mixture causing it to hunt for the proper set up all of the time.
Jimmy

 

yes it has an iac. there is no egr. my vacumn is around 18 and steady. what do you think.

 

The vacuum is kinda low, not bad, but lower than stock. Do you have a larger camshaft in it? Does it use a MAP sensor?
Jimmy