High boost misfire. Help
07-11-2012, 06:04 PM
#42
Fuel is a component of airflow and RPM, if RPM goes up and Boost stays the same then fuel demand will go up as well. It can't make more power if the injector doesn't spray in more fuel. If I recall you are 2bar, so at WO the only thing your injectors care about is RPM and KPA. Regardless of weather or not the spark is good enough the PCM will command a certain Pulse width at whatever RPM/KPA you are at. If the spark is **** then it will be Rich due to un burnt fuel.
07-12-2012, 07:37 AM
#46
Here's me... 
..but I have seen dying coil packs do this more times than I want to remember. There have been two separate occasions on the rollers where torque just hits a certain level and lingers or falls off because the coils couldn't keep up. Lot of good suggestions here, but that's always one to consider.
..but I have seen dying coil packs do this more times than I want to remember. There have been two separate occasions on the rollers where torque just hits a certain level and lingers or falls off because the coils couldn't keep up. Lot of good suggestions here, but that's always one to consider.
07-12-2012, 12:31 PM
#47
Fuel is a component of airflow and RPM, if RPM goes up and Boost stays the same then fuel demand will go up as well. It can't make more power if the injector doesn't spray in more fuel. If I recall you are 2bar, so at WO the only thing your injectors care about is RPM and KPA. Regardless of weather or not the spark is good enough the PCM will command a certain Pulse width at whatever RPM/KPA you are at. If the spark is **** then it will be Rich due to un burnt fuel.