1997 CHEVROLET K3500 7.4L 454 NO START NO SPARK NO TACHOMETER

Asked by UPpartsgirl89 Mar 22, 2024 at 12:54 PM about the 1997 Chevrolet C/K 3500 Chassis Cheyenne Regular Cab RWD

Question type: Maintenance & Repair

WE HAVE TRIED EVERYTHING WE CAN THINK OF. WE'VE REPLACED THE
PCM, ICM, DISTRIBUTOR CAP AND ROTOR, WE'VE CHECKED FOR GOOD
GROUNDS, TRUCK HAS NO SPARK, NO TACHOMETER, AND WE ARE AT A
LOSS. ARE WE MISSING SOMETHING?

4 Answers
311,175

Gene answered 11 months ago

What does the live data show? Open circuits, shorted circuits.

Mark helpful
158,435

James answered 11 months ago

Is the distributor getting power. When cranking you should have 12 volts at the distributor. With the ignition switch in the run position you should have about 6 to 8 volts. Did you have the new PCM programmed to the vehicle using your VIN? Jim

Mark helpful
158,435

James answered 11 months ago

Another thought, is this a security system problem, if equipped? Jim

Mark helpful
2,355

Jeff answered 11 months ago

If you have no spark it is most likely a problem with the distributor. The tach signal is directly tied to the ignition control module in the distributor. It could also be the pick up coil in the distributor.

Mark helpful

Your Answer:

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