Hey guys, little background on the truck. had an lq9, 80e TSP TV2 cam, nnbs intake and TB, and Longtubes. Truck was tuned locally and has been great for about 6 months. Recently I started having some pretty bad surging, like when im creeping along in traffic, or a parking lot. If I snap off the throttle it will jump around 6/700 rpm then finally settle. My tuner is not around right now, but I do have my own HPTuners. No leaks or anything that I know of. Only thing that changed around the same time was the 80e and yank 9.5 stall. As far as I remember, it was doing it before the swap too. Any quick changed I can try personally to help alleviate the problem? Thanks guys

 

The converter can affect the idle if it a different stall rating, and loading up the transmission more at idle. What RPM is the converter rated at?

Can you log the airflow at idle (MAF g/sec), idle trims, and timing?

 

So youre saying when you let off the throttle the RPM jumps up?

Do you have a cable TB or electronic one?