I had my engine swapped from a 305 to 350 TPI, have the correct 22lb injectors and had the memcal programmed for the 350. Before the motor was out, the mechanic put the memcal back into the ECM, and when he tried to start the car to move it out of the garage, it cranked but would not start. After the motor was swapped and ready to fire up, it did the same thing, cranked but would not start. The distributor is brand new, and I gave him another memcal to try and it did the same thing. The next thing we are going to try is replacing the ECM, I found a used one and hopefully that works. But if this does not work, what should be the next step, and any idea of why this happened? Thanks!

 

Was vats deleted from the tune ?, can you mechanic see distributor reference pulse with a scammer ? The actual rpm signal from icm to ecm in datastream ? Spark consistent ? What year your 89 ?