My 1993 SSEI Bonneville just got a new fuel pump and fuel filter put in. the symptoms - it will run for about 20 minutes and then cut off. Codes - 99 PMP. 69 - High Press. SW. circuit. 68 Cruise Control command 67 - Cruise control switch - 66. A/C pressure sensor/circuit prob. 88 - PCM reset.
Note none of the problems in the A/C or Cruise control present and works completely fine. - No SEL present but the computer is throwing these codes. Is my computer going bad.
The car runs fine, but idles with a slight miss. Has all new wires, iridium NGKs and all new GM coils., new UIM gasket and new supercharger. changed within 2 months. Please help me on this I believe my computer is going bad and needs to be replaced.
Moved to 92-99 TD
1993 SSEI Bonneville,in Bright white factory paint with aerolite factory wheels, stage 2 jet performance computer ECM, Heavy duty cryogenic crossed drilled police interceptor front disc rotors with extreme 911 pads, upgraded MSD ignition coils, NGK uridium spark plugs- replaced with Nology Silver spark plugs( The best), K&N air cleaner, JVC 12 CD disc changer and Sirrus radio.