swapped 4.3 to 6.0 and not getting spark to one cylinder NEED HELP

[farmtruc]

yeah true i will do that tom and see if that spark plug works.

it's work to do, but run a new wire from the coil pack to the pcm, there could be an open in the circuit, due to a bad terminal or corrosion on the terminal when it's plugged in.
we've seen the actual terminals not make contact and not fire the injector or coil.

[butler145]

could the piece on the crankshaft that tells the computer when to send spark have broken a gear off that would keep that cylinder from getting spark at that one point?
but just that one cylinder isnt getting fire even after swapping a whole other wiring harness. and where harness connects to coil packs have tried 3 different coil packs. so would think that would eliminate any connection issues.

[zebra]

i don't believe the crank position sensor has gears in it. at least it didn't look like it when i was checking mine.
when i did my swap, none of my coils were firing, but that turned out to be a computer issue

[Frenchy]

swapped plugs yet?

[butler145]

yeah have swapped plugs. thats not problem. we eliminated the omputer issue by swapping 3different computers out. used what came with motor , then an extra a guy had and then took one out of buddys truck thatis running and drives everyday and still no spark.
but i believe the crank position sensor has like little teeth or cutouts on it. i just wondering if those could break some how. cause have replaced i believe everything else or swapped things out and still get nothing out of it.
its confusing for sure.

[butler145]

the relucter wheel could something of happened to that to cause t to not get fire o just one cylinder?

[farmtruc]

do you notice that the tach needle is slightly jumping up and down, or is it smooth?

we just had a 408 in here, built by other, reluctor wheel was damaged, was causing two cylinders not to fire, that was a pita!!!!