I've alluded to this in other threads, but I wanted to separate it from them and try to focus on this particular problem.

The issue, if the outside temperature is warm, say 60F or more, my car will not start. I think it's a no fuel condition. If I unplug the temp II sensor, it will start immediately.

If the temperature is colder, say around freezing, the car will sometimes not start unless I plug the temp II sensor back in and then it is very rich for a short time.

Occasionally, with the temp II sensor unplugged, the car will bog down on acceleration, like it's on 4 cylinders. It's an 88, so it doesn't have the limp home mode.

I have replaced the temp II sensor and checked the sensor wiring, same issues.

New O2 sensor. I checked the MAF wiring. New coils. New plugs. No visible shorts in the plug wires. New fuel filter and fuel pump tests fine.

So, what should I be considering? Intermittent MAF or computer? What else?

 

Not listed:

Ground points cleaning
CE Panel Refresh

 

Try unplugging the MAF and see if you get a warm start.

Did you measure temp 2 resistance at the LH 35 way connector ?

 

You say you checked the sensor wiring... but, let's be precise:

Take resistance measurements from each pin of the TEMP-II to ground.
Then, with the TEMP-II plugged-in, repeat the measurements at the LH and EZK pins that connect to the TEMP-II.

(My PPI giude and the "forms only" version each have a diagram of the pin-outs on the LH and EZK plugs.)

 

Dave's advice is excellent.

The temp sensors screw into the crossover bridge and depend on the bolts to ground them to the engine block. A good powder coat of the crossover will isolate it from ground. Don't ask me how I know this.