kevin_z
Regular Contributor
1995 454XL (MSTS) 860 hrs. Replaced risers and start engine to get warm to re-torque riser bolts, Started up fine. I then replaced spark plugs, cap and rotor. Went to start and backfired bad!! Double checked wires. All is fine. Put old cap and rotor and same thing, no start. Rented a spark tester, and good spark on all 8. Unplugged MSTS to check timing. Almost 8 degrees off. HOW? Moved distributor to timing marks. Re-connected MSTS and tried to start. Worse back fire now.