[string_money]

Hey all, been getting a high gear, high load misfire. Often results in "combustion misfire" in cylinder 3/4/5/6. Seems random between them all. Took a log today and leaned the f out it looks like. Can't tell if this is my HPFP, LPFP, Injectors, or what here. HPFP was replaced under warranty by previous owner. Can anyone take a look?

n54
85k miles
FBO
MHD stage 1
Index 7/8 injectors
New Sparkplugs


https://datazap.me/u/135igarrett/mis...-16-17&mark=50

[konstat]

Originally Posted by string_money

Hey all, been getting a high gear, high load misfire. Often results in "combustion misfire" in cylinder 3/4/5/6. Seems random between them all. Took a log today and leaned the f out it looks like. Can't tell if this is my HPFP, LPFP, Injectors, or what here. HPFP was replaced under warranty by previous owner. Can anyone take a look?

n54
85k miles
FBO
MHD stage 1
Index 7/8 injectors
New Sparkplugs


https://datazap.me/u/135igarrett/misfire?log=0&data=3-4-7-10-11-16-17&mark=50

How old are your coil packs? I’m also having the same issue but when I go above 6300rpm only. Does the engine slow crank when you cold start? From what I’ve read the misfires could be caused by a leaky fuel pressure regulator. I need to swap mine out but haven’t had time. If you have a slow crank then start there.