pepe88

Turned my 93 tune on tonight and noticed that the car studders in low gears at around 4k rpm. I'm running 93 gas. I have the stock DV and turbo inlet pipe. They will both be changed within a week. I also have a 2.5" dual exhaust an APR intercooler, and cold air intake.

Is it the DV or turbo inlet pipe that could be causing this. If not, what else?

JohnLZ7W

Sounds like you are getting misfires. Could be a few things, coilpacks, spark plugs, bad MAF, or even a fuel pump on the way out. You need to scan it for faults to find out what's going on.

DuvalDino

Agreed, sounds like misfiring! On newly tuned cars it's not uncommon for 1 or multiple coil packs to go out. I just changed mine out with spark plugs. I recomend NGK BKR7E's gapped to .028, and a new set of coil packs. ECS has a pretty nice deal...