Died while driving. Didn't cough or sputter, just lost power. Haven't been able to start it since.

Fuel pump and relay are making the right noises. We appear to have a good spark going into the distributor cap. Timing belt seems to be intact.

The OBD 6 socket is giving me a 4-1-3 code, which pertains to something called an EGR temp sensor, but that's the only code in getting. I don't know enough to know if that's my problem.

What else do I need to check?

 

That wasn't the timing belt I was looking at earlier. It's been a while since I was under the hood and I forgot which was which.

I just checked the ACTUAL timing belt, however, and while it too looks like it's in one piece, it is not turning. All the other belts and pulleys are spinning away just fine, but the timing belt stuff just sits there. Nothing's moving inside the engine either, from what I can see with the oil cap off.

What causes an intact timing belt/apparatus to not turn?

 

EGR problems shouldn't cause any drivability problems, they are purely a smog thing.

If the accessory belts are turning when you crank the car, then the crankshaft is turning.

If the timing belt is NOT moving, then either that belt or it's tensioner are broken, or the timing belt cog on the crankshaft is somehow free spinning on the crank (rather difficult for that to spin yet have the accessory belt pulleys turning fine).

The good news about a broken timing belt, this is a non-interference engine, so there should be no engine damage, just fix the timing belt.



(the timing belt cog is the smallish bottom one on that picture of a B230F with its covers and accessory belts+pulleys removed).

 

If the timing belt hasn't broken in two, it may have sheared the teeth off. I have seen this happen on a 240 that had been overheated. When you remove the timing belt, check the camshaft to see if it is binding. In the case I observed this, the camshaft was seized and the teeth were sheared off when attempting to start the car.