[scottfab]

I'd say more info is needed. Does this happen when fully warmed up too? Does it happen with the power key off? With air filter removed?

Some SWAG on it:
1. oil build up in the map sensor tube.
2. small vacuum leak
3. an ignition wire or coil starting to go
4. an injector
5. fuel pump at marginal low psi

sky is the limit at this point.