Emissions problems. Check to see if the EGR valve is working correctly, the IAC valve, coolant temp sensor (the one beside the thermostat), and the MAP sensor. These sensors are used by the PCM to run your engine. Fuel overload has been a prob with mine...time to check the PCM next.
If you are saying the engine starts and runs for 15 seconds and dies and then starts again for another 15 seconds and dies . . . the distributor seems to be doing its job. You might want to check if there is a fuel restriction somewhere (filter or pump).
Fuel pump
if it starts and runs for just a few seconds then dies it is generally a carburetor issue. clean or replace the carb and that should solve your issue.
It's probably your IAC.
The contour warm air blower starts on a timer 45 seconds after the burner initially starts, not on temparture
Diagnosis: Engine Won't Start or RunCheck related link below
change fuel filter
1991 mitsubishi eclipse 2.0L starts 2 to 3 seconds later shuts off
seconds
Engine keeps cutting out. I turn the key off, then turn it back on in about 30 seconds and engine starts easily. but will continue to stop after only a few miles.
It is the VANOS working in conjunction with the cold start injector... once your engine reaches that proper temp, the "shaking" goes away.
IS THE CHECK ENGINE LIGHT ON? IF SO, DOES IT HAVE CODE 0420? IF THE CATALYTIC CONVERTER IS BLOCKED, THE ENGINE WILL RUN FOR A FEW SECONDS AND STOP BECAUSE THE EXHAUST BUILDS UP TOO MUCH BACK PRESSURE.