running rough - help

[jamie_supra]

Please help
Earlier today was driving along. booted it a liottle and when i was slowing down i noticed that at low revs it is running very very rough. Hoever at 3k its quite smooth again
 
Up to 3000 revs its not very little power and doesnt sound happy.
 
Over 3000 revs its fine and the turbo is chattering away nicely and booting fine.
 
Also when when u turn it off and try starting it again it struggles to start.
 
I loked at my power FC commander and the knock reading is showing nothing! normally that is bouncing up and down at about a quatre.
 
Have i lost compression in one or more of the rotars or do i need a new knock sensor?
 
By the way its a single turbo conversion 1994 RX

[m4drx]

sounds like it lost a tip.

i know you have engine troubles recently but was this mapped etc?

[jamie_supra]

boost was right down! this was a brand new engine too!
i guesses it might have been. was kinda hopeing it was the knock sensor!

[m4drx]

if it wasnt run in then not suprising otherwise it is but basically head back down to the engine builder mate.

if it sounds like tractor on idle and ok above 3k then sounds exactly right.
does you boost/vacuum stay stil on idle or fluctuate on the boost gauge/apexi if you have one?

hopefully may be something less serious but either way you got warrenty.

good luck mate.