My ignition timing seems to 'jump' around. On the L1 lead i will read that its right at 5deg. ATDC sometimes, then it will jump around to reading its firing at completely the wrong time. I tested the L2 lead, and it was saying that sometimes IT was firing at 5deg ATDC. Same story with the trailing ignitor.. sometimes it was on sometimes it was way off.

I searched and couldnt find similar issues.. what could be causing this?? Tried TPS (tested and set fine) measured CAS resistance at the ECU and tested fine. Spark plugs and wires are fine... help me out again. HAH hopefully this will be it for the 'help me' threads

 

Im showing only 10psi vac at idle, could that be causing my timing problem or could the timing cause my vac problem? (checked for air leaks, nearly 100% sure im not leaking. Replaced and sealed all gaskets and block off plates, vac lines and caps. even checked with starter fluid)

 

you pprobably have a small missfire causing your timing to jump around. look at your vac gauge if it jumps sharply you have a ignition missfire. if it slowly sweeps back and forth its fueling

 

By fueling you mean a fuel problem? If the timing is off isnt that mis-firing? cause if the timing light is right then its firing almost 180deg. off half of the time