I've got a similar issue, but it'll start fine when it's warmed up. Crank crank crank + some throttle till it finally fires, catches a bit and stumbles to an uneven idle. After about 40 seconds of idling you can give it some gas and it'll rev up/down just fine. After about 2-3 minutes you can shut it off and it'll start up just fine.
The Problem is getting it started initially. Any ideas? Got fuel, spark(new wires/plugs), intake(thought it may be IAC, but even with a bit of throttle when attempting to start it does the same). Alternator needs replacement, it can't maintain output voltage (pulses, warm and cold).
I need ideas...