whizkid

Hi just got my first Scooby. Have been out in it and every now and again when accellerting hard it judders between 4000rpm and 5500rpm. (haven’t taken pass that).There is plenty of fuel in it (shell optimax) Have reset the ECU by taken the battery leads of for a couple of days, Just had new spark plugs in before in picked it up. Model and spec My93 wrx (Japan import). Greedy Dump VTA. Different exhaust (3inch stainless). What should I be looking for next to solve problem. I have only done 150 miles in it so far.

dowser

Spark plug gaps or coil packs?

Richard