Hey check the reluctor gap on all 8 positions really thinking the upper dist shaft is bent. Seen it on even NOS distributors. The blue boxes are good for 5500 rpm with all the testing I have done. Doubt it is ecu. Really leaning to pick up related. Get any worse say when it is hotter?
Thanks for the tip, I’ll check the gap in all positions. The problem remains the same whether the engine is hot or cold. Does it both under load and in the driveway.
It’s been mentioned before that the pickup wires could be reversed, but how likely is it that that would happen with 2 separate distributors?