Ok guys, I have a 1990 Iroc with and L98. The car has about 175k on it and has been running great up until the past month. All of a sudden I have noticed a slight hesitation around 2000 rpm. The tach jumps and i can feel it. It is only cruising that i feel it and only at that RPM. I first thought TPS and figured it had a flat spot causing the hesitation but it tested out fine. Any other ideas? I appreciate any help.

Also i had to replace the ignition module about a month ago when it went out stranding me, not sure if that could have anything to do with it.