by Steven Allen
(Lake Martin, Alabama, USA)
Engine won’t run faster than 4000rpm. #1 injector unplugged rpm barely drops. #4 unplugged is same as dead cylinder. Swap coil position, stayed the same. New injectors made no difference. Fuel pressure 37-38 psi through all rpm ranges. New separator/filters. New LFR5A11 plugs made no difference. Voltage to injectors is same on all 4. Voltage to coils is balanced as well. Any ideas?