The car boosts and runs fine past 1.5K, below that is idles rough at 500rpm, I have just changed the spark plugs but still no joy, do you think it could be the coil packs?
When you had your engine done did you have any porting done to the exhaust ports, if so that does make it sound a bit lumpy. :3Confused
yes both inlet and exhaust ports have been done, but it has been idling perfect and running well over the last 2 months , it started idling rough over the weekend.
I might get some second hand coil packs and change them to take them out of the equation