EZL=ignition control unit. Have seen that before, especially the "rap test", and the fact it started doing it when hot, now it's doing it cold makes sense. You might be able to find a reman ign control unit as well, which would save some cash.
I was going to guess the fuel pump relay, I've seen these fail only when hot as well, but be OK on cold starts.

Ignition unit way less than the ECU anyways......

Gilly

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