Copp69

I’ve got an imported 2002 350z. Car went into limp mode on the way to work, scanned it and had codes p1122 and p1126 thrown up. Then it wouldn’t start. One of the boys reset the throttle body. Then a week later it wouldn’t start so I started driving my other car. I changed the throttle body and battery because it died as I was waiting for parts. The (second hand) brand new tb fixed it for a week, come to it this morning and same thing happened again. Could it be the wiring loom that connects to the tb, or the throttle position sensor? I’ve been told it could possibly be timing as it’s backfiring through the inlet, just don’t want to fork out that much money. Anyone else had any similar problems? I haven’t had much luck finding anything online so anything would be appreciated. Thanks in advance