Hi guys, new user, new owner.
I have scoured forums, and have an original FSM. Trying my best to search before reaching out, and doubly trying my best not to freak out and start replacing parts or tow to mechanic.
I have a 74 260Z. Initially had some issues with starting and battery getting drained. I replaced the alternator with a frontier alternator and bypassed the external regulator. Things were looking great. Weeks later, started to have some running issues, so I took it to mechanic. He installed a new coil, new point, and bypassed the ballast. After getting the car back it was running fine for a few weeks, but started having some issues starting.
At some point the car was switched back to a single point dizzy, I bought a zcardepot electric dizzy and tried to swap it in. The rotor was 180 degrees off, so went back to the original single point. But when back on the old point dizzy, had significant running issues, would idle fine and run 2-10 minutes and just lose power. Would not reliably restart, and would have to advance or retard the timing to get off the street. In a likely dummy move, said to hell with it and went down the path of swapping to a pertronix electronic dizzy conversion and getting no results. I think I am painting myself into a corner and want to move smartly back to normal operations.
Problem 1: Swapped back to old points dizzy. The car started and idled fine, I checked timing and it looked decent. But would loose power when driving. In order to get off the street, would need to either retard or advance timing to get it started. Moved the engine to close to TDC and adjusted from there. Would again start and idle for a bit, but loose power. Unless I have the engine at TDC, it wont start. If at TDC it will start and run for a bit, but die and not turn over unless at TDC again. Still have the ballast bypassed.
Problem 2: Swapped the point to a Pertronix electric conversion. Still Getting zero fire on that. Tested spark to plug and nothing, test spark from coil to dizzy, nothing. Checked if coil was getting power in the on position, ran a wire from neg side on coil and tapped valve cover and had spark. The coil is 1.4ohm and running the ballast as bypassed still. Even tried swapping dizzy wire around from + and -.
Fairly certain all wires are connected properly and nothing is hanging loose.
Not sure where I go from here, do I keep pursuing the pertronix route or go back to points? If I go back to points, not sure why I am having new problems and where to look next, I am in self denial that another problem has arisen (ICM). Any suggestions would be appreciated, the FSM is a bit short as I am now off the reservation.