My HPDI has been running rough, and has not been hitting on all cylinders, I don't believe. I ran the diagnostics on it Sunday, and all coils are operating, as well as the injectors. My plugs could stand to be changed, so I guess I'll be doing that. Biggest question is, I've always run NGK BKR7EKU plugs in this motor. Do I, or should I, go with something other than NGK? These plugs aren't even a year old, and I don't make long runs. Just seems to go thru these plugs more often than you'd think. I've had problems finding a cross reference chart online, but also want to make sure I'm running the same plugs. What exactly are the plug needs and specifications for this motor?
Also, while all plugs were out, I did a compression test. Lowest was 85, highest was just over 100. I think I'm ok and within boundaries, but know that's pushing it some. Trying to push the boat up on the trailer has been a struggle lately, as it just bogs down. We'll start with the plugs, then I'm not real sure where to go. But it def needs something. Thanks for all considerations.