On an 86 Fiero 2.8 timing chain change, cam gear clocked at 12 or 6? (mark on gear). My engine Guru clocked at 6 and it wants to backfire. Yes it was set to #1 TDC.

It should have a line up mark on it, but it is supposed to be at 6 oclock. either engine has internal damage or other problem like fuel injector or ignition failure

Have new injectors, and for good measure new ign module cap rotor and wires.Pick up coil shows 948 ohms so thats good, This ones a real what is it!