Hello. I was hoping I could find some one that could answer some question I have about my 95 mustang gt 5.0 manual tran. 168k miles. Not a bunch of upgrades. Stock exhaust. Screamin Demon coil. Live wire spark plug wires. ca intake. The other day I started my car and rite around 1100 rpms the car has a really bad shake but only around 1100 rpms ? Timing is around 13 14 degrees Any suggestions ?