Hunting for Idle on Deceleration

[7Dust]

Recently installed a new IP.

Truck doesn't seem to want to start as easy as it used to but it starts in 1-2 seconds. Previously any bump of the starter no matter how short would start the truck.

I set the idle speed and truck is happy. Not sure what its idling at since the tach is flaky but sounds like a nice healthy idle.

Problem is that on deceleration with truck in neutral - it will hunt for idle for 5-10 seconds sometimes. It sort of surges looking for the idle sweet spot and then settles in.

Any ideas?

 

[sandcobra164]

air leak or low on fuel. Mine did that to me one time. I had just come back from the GA Rally and decided to drive it to work. I probably only had 10 gallons of fuel and went through some rough terrain. On the way to the gas station, it was acting very different. Everytime I pull up to an intersection that I had to stop at, it'd almost shut off and hunt for idle. It ran fine when accelerating or running down the road. When I fueled up, I left it running. It smoothed out after about 10 gallons got in the tank. I put 39 gallons in and drove home. It has never hunted for idle since and I make sure to keep it above 1/4 tank now.