So my 2011 Z4 35is N54 was stock..did 345BHP 500nm on my go to dyno..
Stage 1+ did 390 BHP and 560nm
Fitted new index 12 injectors (old set of 5 index 9 and 1 index 12)
Plus new NGK coils and VSRF downpipes .
Then re-map to MHD 2+ and xHP stage 2.
just been out on initial shake down runs.
Car misfired when midrange foot to the floor acceleration from around 80 mph..engine light on and vibration.
Protool said engine misfire cylinders 1 and 2 ..no other codes..
Since I was 300 miles from home by roadside I decided to flash stage 2 to see if that stopped the mis fire…so far no issue..but…
Then noticed MHD states
As an aside any suggestions on cylinder 1 n 2 misfire?
Stage 1+ did 390 BHP and 560nm
Fitted new index 12 injectors (old set of 5 index 9 and 1 index 12)
Plus new NGK coils and VSRF downpipes .
Then re-map to MHD 2+ and xHP stage 2.
just been out on initial shake down runs.
Car misfired when midrange foot to the floor acceleration from around 80 mph..engine light on and vibration.
Protool said engine misfire cylinders 1 and 2 ..no other codes..
Since I was 300 miles from home by roadside I decided to flash stage 2 to see if that stopped the mis fire…so far no issue..but…
Then noticed MHD states
- Stage 1 (up to 360HP/520NM) - 91oct/95ron, 93oct/98ron, 95oct/102ron, for stock cars.
- Stage 1+ (up to 390HP/600NM) - 91oct/95ron, 93oct/98ron, 95oct/102ron, FMIC recommended.
- Stage 2 (up to 380HP/560NM) - 91oct/95ron, 93oct/98ron, 95oct/102ron, high-flow downpipes recommended.
- Stage 2+ (up to 420HP/650NM) - 91oct/95ron, 93oct/98ron, 95oct/102ron, high-flow downpipes + FMIC recommended.
As an aside any suggestions on cylinder 1 n 2 misfire?