Maybe your issue is that number 8's injector is leaking not that the ignition is the problem?
It’s carbureted not efi.
Floats are half way up sight glasses, idle feed restrictors are .031’s, idle air bleeds are .065’s.
Main jets are 65s and secondary jets are 75s, high speed air bleeds are .033’s.
Timing is 18 initial 32 total, 10 degrees of vacuum advance @ 20hg of vacuum.
I have played with the carburetor settings a million different times, I’ve tried smaller ifr’s bigger ifr’s smaller and bigger main jets, I’ve tried raising and lowering the floats.
Nothing works the missing is still there regaurdless of carburetor tube and settings.
I’m convinced there is a specific issue with cylinder 8 most likely a broken valve spring or the crane cd ignition box is causing the issues.
I’m just not sure which one.
Normally I’d be blaming the crane ignition box but the fact that cylinder 8s plug always seems to be struggling to fire compared to the other 7 cylinders has me thinking that there is a chance that cylinder 8 has a specific issue that’s isolated to just cylinder 8.
But then again I hooked up my timing light to all cylinders and brought the rpm up to 2500 and I could see every cylinder missing at 2500 rpm with my timing light.
Then I decide to increase the rev limiter from 6k rpm to 9k rpm and now I’m no longer seeing the missfire on every cylinder at 2500 rpm.
But I am still having an issue with cylinder 8s plug becoming fuel fouled.
I pulled the passenger side valve cover and looked at the valve springs on cylinder 8 and didn’t see anything un-usual with them or anything un-usual with the rockers.
So I’m just confused and frustrated cause I have no idea what’s going on with this thing.
