I OWN A 1994 PONTIAC BONNEVILLE WTIH AN AUTOMATIC.
MY CAR STARTS AND TURNS OVER SLOWY BUT SOME TIMES STARTS QUICKLY.
THE BATTEY CHECKED OUT AND THE ALTERNATOR CHECKED OUT.
THE ONLY TROUBLE CODE I FOUND WAS P0740 THE TCC: TORQUE CONVERTER CONTROL
MODULE CIRCUIT MALFUNCTION.
MY ALTERNATOR PUTS OUT 13.4-13.6 VOLTS
THE BATTERY HOLDS STEADY AT 12.1

"rgreen121" <car111a (AT) aol (DOT) com> wrote


This is how I test battery voltage:
12 Volt Battery voltages as indicated by digital voltmeter.
Turn on headlights for one minute to remove surface charge.

Voltages % Charge
=>12.6 full
12.4 75
12.2 50
12.0 25
<12.0 discharged

Obviously it's not checking out. Charge the battery then check alternator
output.