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Turns over but no spark?

Tiny
PHILLYRICAN001
  • MEMBER
  • 2003 MAZDA PROTEGE
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Changed spark plugs, wires, coils, checked fuses, relays, fuel pump works (can hear it power when key turned), read wires to coils, cam switch, capacitor, crankshaft position sensor. Any other ideas other than the computer?
Saturday, August 20th, 2022 AT 7:46 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Are there any codes? This guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, unplug the injectors and Oxygen sensors to see if the spark comes back, if one of these is shorted it will stop the PCM from triggering the coils. Also check the Meter and engine fuse. Here are the engine wiring diagrams so you can see how the system works and check for good power and ground. If everything checks out, you may have a bad PCM.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Saturday, August 20th, 2022 AT 3:50 PM
Tiny
PHILLYRICAN001
  • MEMBER
  • 2 POSTS
After checking all the above, I noticed the timing belt/chain was not turning. I replaced it and now works fine!
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Thursday, July 13th, 2023 AT 10:12 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
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Friday, July 14th, 2023 AT 8:39 AM

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