Following. I have Black brown smoke, dies on hills and can even stall after cold start, even after a 5min warm up, omce its hot gors good. but blasts out black brown smoke on takeoffs or overtake, good Accel etc, im able to hit 120-130+ lucky me, brand new SCV, brand new Fuel pressure rail sensor, resetted ecu/fuel pump to learn mode.. battery neg terminal off hold brake pedal trick,. Going okay .. when warmed up, too much smoke, fearful of getting done.
Saw a video other day on YT by a Mechanic shop based in Sydney Northern beaches, with a Customer D40 in with Heavy smole & massive lack of power...
They said in video they suspect EGR, changed all EGR & piping,
no smoke, monster power like a new car.
I dont want to give any advice,
but for me ... I am spending the $400 bux on all new EGR Valve& Pipes soon,
my mechanic prices r great, womt cost me much to fit & i am confident i will have greater power back & the smoke issues etc will go.
Blocking off works, but for me only for a week or so, no smoke & like a new car, then heaps of smoke back... also my heater didn't work suddenly.. must be so blocked n caked up in all that & i have a EGR code coming up.
Its going! Full replacement for my YD25