The truck will run fine for hours, then while driving at any speed it will cut out as if the coil wire were arcing, then back to running fine. It's not dependent on RPM, speed, or throttle position although it hasn't happened at idle. It starts well and runs smoothly.
What I've done so far:
New cap, rotor, wires, plugs. Ohmed pickup coil in distributor OK Checked pickup coil air gap. OK Ohmed high tension coil OK Replaced high tension coil and ignitor with known good one. Checked for computer codes. None Checked timing. OK Checked connections on coil, distributor, computer. Adjusted valves.
Any ideas?
Q