most common bad ecm or dist?

145,000 MILES
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LARSONJALAN
  • MEMBER
  • 1 POST
94 camry 4cyl, ck engine lite on, code 12, no rpm signal to ecm, wires from dist to ecm ok, lite comes on approx 2 secs after start, car runs ok, tach works. How do I ck dist output? Does this cause mpg problem?
Jun 10, 2012 at 8:32 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
See if the schematics are of any help. More common cause would be the distributor.
Jun 11, 2012 at 10:05 AM
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