OK 88 Vert. Air filter R&B header, 24" resonator, 3" Exhaust. It just started this problem the other day (3 Days ago). When in part throttle it baps like a sheep till it catches at times, I get like that mainly on the freeway shiftin to 5th passing a truck at about 3500 Rpm. It does it from time to time in 1st or 2nd gear. Sense my car is now loud as hell I cant leave at WOT cause it gains police attention. is this a fuel or ignition problem. I had to adjust my CAS. due to stalling and I Idle at about 800-900 RPM. I never touched my TPS so I dont think that would be the problem. So any help would be great thanks.

 

does it always happen at 3500ish rpm?

 

in 5th some time about 3500 at 84MPH it happens in lower gears about 2000 to 3200 10 to 20 mph it's never really at WOT just like just over half throttle. It did the same when I was completely stock. Now I'm no where near stock anf it does the same thing...

 

I havent had the 3500 hesitation sense I tuned it the first time I flooded it. about 2 months of having it.

 

sounds like you have a bad TPS. I would check it sweep of it with a multimeter and make sure there aren't any dead spots.

 

ok thanks!!! I will...

 

Sorry I forgot to post that I found the problem. I switched over the Pulse Dampener from S4 to S5 and it was the bolt that was to long and I put washers to tighten it down and the bolt loosened up and was causing a vacuum leak. thanks for all the help!!!