Hello folks
2005 CAT C-6000 with Nissan 2.5 on LPG (Ser.# AT83F00151):
Intermittantly sets code 27 (crank sensor) but sensor wave form seems ok (although voltage is higher than spec).
Another tech here says this happened before and a coil pak solved it...for a while.
Now it's back (miss and code 27).
Another coil pak (different cyl) and all seems ok again.......
Why would a bad coil/miss cause it to set code 27??

Thanks! -Jeff