1998 Chevy Metro 2 fuel injectors not firing

Tiny
METRODRIVER
  • 1998 CHEVROLET METRO

Computer problem
1998 Chevy Metro 4 cyl Front Wheel Drive Automatic

Fuel injectors 1 and 3 are not getting a trigger pulse from the ECU. 2 and 4 trigger fine. Got a used "good" ECU and it had the EXACT same symptom. Can't be the ECU right!
1 and 3 can be triggered manually with a back probing jumper to ground from the respective pins in the ECU, which verifies the wire and injectors work fine.

What else could cause this symptom other than an ECU with 2 bad injector drivers? Having a hard time believing I have 2 bad ECUs!

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Saturday, April 10th, 2010 AT 3:23 PM

1 Reply

Tiny
RASMATAZ
  • MEMBER

If it has a camshaft sensor could be it -being use to synchronize the injectors

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Monday, April 12th, 2010 AT 6:01 AM

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