i just had my greddy turbo kit put on my car last week and tonite on my way to work it just died....i was driving about 25 mph at about 3000rpm when it just shut off....after about an hour it started back up and i made it to work...on the way home i was sitting in traffic not moving when the rpms jumped up to about 2000 then dropped back down to 0 and the car died again. it won't start this time...it starts to turn over but does not fire up. i need help thanks...

 

My dads car (97civic) had a problem like that. He could drive maybe 10-15 minutes, and then it would just die on him. He'd have to wait a little bit to drive again.....and it would then die again 10-15 minutes later.
Are you getting spark when you crank the motor?
Have someone stick a timing light on it when it "dies" and check if spark goes through.
It ended up being a bad distributor that was put in a couple days before.

 

How many miles does your car have? Tune-up? change plugs or coil, rotor,etc.. Check alternator even. Its most probably something electrical.