I can only hear it missing when the throttle is held at 2509 rpm while it’s in park.BB70 wrote: ↑Wed Feb 14, 2018 9:34 pmIn my post above I advised to hold the rpms at 2500 and remove one plug wire at a time. When the plug wire is removed , note the rpm drop for each cylinder. They should all drop aproxx the same rpm. The one that barely drops is a cylinder that needs looked at. That test is called a power balance test. You said it pops in the exh at that rpm, if it stops popping when a plug wire is removed that is your problem cylinder. Just because you have new parts on doesn't mean anything. Good luck and be careful .
That’s why I’d like to have it monitored by an engine analyzer.
I don’t really want to be pulling plug wires off at 2500 rpm and noting the rpm drop.
It would be a pain in the ass and the hedders would be super hot and it just sounds like an accident waiting to happen with ether getting burned or shocked or both or even damaging my Msd box or my coil.
I’m still not ruling out an imbalance issue with the converter or flex plate.
I’m just leaning towards thinking that it’s not an imbalance issue because I don’t feel anything below 2400-2500 rpm.
But I guess that doesn’t mean much.
I’m going to pull all my plugs again this weekend and check on them since I haven’t looked at them since putting this MSD Ignition box inn.
Maybe I had a fouled plug because of the issues I was having with my crane cams hi-6 box and that’s what’s causing the fuss.
I kind of doubht it, but it is worth a shot checking them out.
My crane box did appear to have some kind of problem though, I would have super bad missfiring at 2500 with the crane box m, bad enough to where the truck would be missing so bad while driving at 2500 you’d feel it jerking and sputtering.
I put this msd box in and separated the trigger wires from the coil wires and it got much better, it doesn’t sputter and jerk like it was with the crane box, but I still have a rough spot under load.
It would be nice if it was a fouled plug prior to installing the msd and it would be nice if putting a new plug inn solved it.
Guess we’ll find out on Saturday.
I still need to call a few shops and find someone with an engine analyzer cause I just want to rule out ignition/ internal engine issue like a valve spring or valve before I spend the money on a new flex plate and converter.