87 mustang gt- no spark

i have no spark out of the coil, ive replaced the coil, ignition switch, i got a brand new battery and also replaced the TFI ingnition module, i had the altenator tested and its good, im reading 12.29 volts at the positive terminal on the coil, and 12.53 at the battery. the car turns over and the fuel pump is sounding loud and clear put there is absolutely no spark... im short on options and dont know what to do next... PLEASE HELP!

Have you checked distributor pick up or crankshaft position sensor (not sure which the '87 uses) for signal? Did you do any work on the car just prior to this no-start condition occurring?

-Rod

no prior work was done, i was driving it regular (not hot rodding it) at the time and at an idle for about ten minutes before it died the car would drop rpms to about 200 rpms and then come right back to normal (1000 rpms) without shutting off copletely then the one time it died and its been without spark since.

I think you need to check the pickup coil on the distributor shaft to make sure it's not going open. The pickup is what triggers the ignition module to fire the coil. If you have a good coil with power and a good ground to it, and you haven't dinked with the wiring, along with a good ignition module which you just installed, the pickup coil is about the only thing left.

I trust you're checking for spark right at the coil and aren't using a possibly bad coil wire.

-Rod

yes im testing for spark right at the coil... from wat ive read about this pick up coil and what they do uppon going bad, i also now think it is the problem because of how the car acted right before dieing.... im getting the pick up coil for 18$ brand new... im gonna install tommorow... ill let you know what happens.

IT WORKED!!!! It was out of time a lil bit cause ive never taken a distributer out and appart before, but i got that worked out... thanks, you saved me from a large shop bill im sure.

Congratulations! And thank you for posting the follow-up on what it took to fix your car's problem!

-Rod