Under wot it is stuttering badly, boost gauge is bouncing up and down violently-
I have swapped over coilpacks for known good ones, swapped ignition amp for good one, all boost pipes are good. I recently swapped out my n75 j back to standard n75 c, but it was fines for 4days previous to today.
When it is stuttering the mpg drops to like 7mpg and it smells rich.
No fault codes other than temp sender intermittent reading.....
Would the MAF cause this or N75 c. I thought the N75 would defo log a code??
Any help appreciated