I have been experiencing some odd behavior when starting my Renix Cherokee lately. While the starter sounded like it was spinning fine, the engine would not fire up. Often it would fire just as I let go of the key.
I have been running an old Optima battery that I got back when ChumpCar was giving them away as part of their sponsorship, The battery read over twelve volts and the starter sounded fine. However, I noticed that the REM was shutting off and the voltage was dropping while trying to start.