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Raye
TBI 1992 Caprice Classic LTZ 5.0L Intermittant stall & no-start condition. experienced techs only please.?
92 Caprice will occasionally stall with no warning & will not restart immediately.
-Has new fuel pump with more than enough pressure past the filter.
-Within the past year has had ignition coil, TPS, IAC valve, plugs, wires, cap, rotor, distributor with ignition module & pick-up coil all replaced.
-Engine will run for over an hour sometimes & five minutes others before stalling. Then the engine will crank but not fire & has good spark to the plugwires but no injector pulse. However if you spray carb cleaner below the throttle plates, engine will start & injectors will begin firing again for a few minutes & will stop firing again causing another stall. Are there any GM techs who can explain to me what besides the ECM & pick-up coil controls injector pulsing? And has anyone ever encountered this before? Should I replace the ECM and if so will I need to have a GM dealer program it? or can I just swap the chip from the old one to the new ECM?
10 AnswersChevrolet1 decade ago