Thread: P0340 keeps popping up after a known working Dizzy installed

So long story short,1996 P10 DE-T, Dizzy went bad (P0340-CAS) under load on the highway and killed my motor, put a known working Dizzy in with new cap rotor and seals, and drove great for a few days (approx 70 miles) before I got everything rebuilt from the ground up so I could stop burning fluids, put that same distributor back in the car after the rebuild, idled great, timing is on point, no hiccups during warm-up or test drive even under load up and down hill, then go to drive back home and about half way home (approx. 15-20 miles) misfires ones and a (P0340-CAS) and (P0135-Front O2), double checked the flashes on the ECU and they were correct code 11-CAS, and code 33-Front O2, Does anyone have any pointers??? I am going to put another Dizzy in and a new Denso front O2 but didn't know if there's something else I should be checking, so to all the wise minds out there please help me out with this

are your wires all OK.

also what ecu? i never ran o2 sensors in these old cars if using a tuneable ecu such as a calum.

I'm using Nistune, the car is OBD2, all the wires seem fine, I don't see anything that will warrant any kind of concern, I changed the O2 sensor out and cleared the codes, then drove it for about 10 miles with no issues I'm really thinking the Distributor may be bad again, because I know the humidity/moisture can play a factor if it is on its way out