Can any help. Was driving to work and when I first took off the car stumbled a bit but then everything was fine. Drove about 20 miles to work and just before i reached the parking lot the car sputtered then died. Rolled it into the lot and went to start it againg and it started but it just went pop pop pop at idle. Any idea what it could be.

 

Good chance it's your Optispark. Just about the same thing happened to me.
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Yeah...that DEFINITELY sounds like the opti took a dump on you. Sorry to be the bearer of bad new, but that popping is probably the unburnt gas sent through the exhaust , because of a lack of spark to burn it off.