One year ago I did a head and cam swap and tuned my car using Edit.

The car did run great for almost a year.

Now, however, it is acting weird when cold - it kinda shudders a tad and feels like it is starving for gas. When it warms fully it runs fine.

Is this likely dirty injectors, bad fuel filter, carbon buidup, bad wires or what? I would think that if it were any of these sources that it would not run great after the engine warms up; right?

Is it possible that the car needs another or different tune using EDIT?

 

Fouled O2s on their way out, just hanging on
a little better once they get hot?

 

I had not considered that; good point.

Question: if the O2s are fouled, I assume I am running too rich or lean (probably too rich)?

Thanks...

 

you need to run a diagnostic scanner (autotap, efilive) to see what they are reading.