First off, I first noticed this while driving open header to the exhaust shop. I just switched from my type r style (2.5" collector) header + highflow cat (which blows) to stock header and stock cat to pass emissions… At first I thought the hesitation was due to running open header, but with the exhaust all welded up the hesitation persisted.
Now the problem: From between 2000 - 3000 RPM ONLY, sometimes I get a hesitation while accelerating normally. It’s not jerky or anything, it’s basically the engine is just stuck, it just stays at the current RPM. The way’s I’ve found of solving the problem is to completely release throttle, the reapply and to put the clutch in for a couple secs, until RPM drops, then re-engage. Sometimes the hesitation starts at around 2700, in which case I just keep going until I reach 3000RPM, then the car snaps out of it and everything is normal again.
Sorry for the run-on sentences and the ramble. Anyone have any suggestions? I don’t know where to start, especially since the hesitation doesn’t happen every time and is only present in said RPM ranges…
Car is 90 DA with B16