Just completed a complete '92 5.0 HO and AOD swap into my '68 Coupe......got it fired and it's idling through the roof!!! No tach, but I'd swear it's around 3000!! Brand new TB, brand new injectors, cleaned the IAC and it is functioning......Cobra upper on a Explorer lower. Stock long block. I can't find any obvious vacuum leaks. What the heck is going on?

What am I missing? TPS checked ok also.

My first ever engine swap and project car, so I'm still learning as I go, any help would be greatly appreciated. :-)


EDIT!!!!!!

I got it!!!!

Found an uncapped vacuum line under the upper!!! DUHH!!! I'd delete this post but can't figure out how!! LOL!!