2000 Dies intermently restarts

I have a 2000 bonny with a very unoften stalling problem. Once the tach dropped with out the engine dieing. It starts every time. No codes in the computer. It seams like possibility of a ign module. Any Ideas?

Ign module, probably not, sticking egr maybe, dirty iac and throttle maybe.

Sounds like a crank position sensor to me. The RPM dropping to zero is a classic CKPS problem.