I just purchased a 94 z28. I will send money for a cold beer who figures this one out!

I need help guys....I have a bad miss when the car warms up. The miss is between 1500-3000. rpm Here is what I have done so far....my mechanic friend has done a computer diagnostic. All sensors are ok, the plugs and wires and coil has been changed. No engine light or nothing comes on. My mechanic as a last straw stated to change the distributor and cap. I have not changed the ignition module yet. I have just about to give up

It has even stumped my mechanic friend. Any suggestions would be grately appreciated!!!!

 

I need some MSD ignition money.... so here is my attempt..


Arent those the RPM's where the EGR is supposed to open?? What if there is a Tore up EGR diaphragn thats leaking vacum and not opening or partially opening the EGR?? Mine is a 95 and It uses vacum to activate the EGR. so I am almost positive yours is vacum activated too.



Marvin