Turns over but no spark?

2003 MAZDA PROTEGE
145,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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PHILLYRICAN001
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  • 2 POSTS
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?
Aug 20, 2022 at 7:46 AM
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STRAILER
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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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Aug 20, 2022 at 3:50 PM
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PHILLYRICAN001
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After checking all the above, I noticed the timing belt/chain was not turning. I replaced it and now works fine!
Jul 13, 2023 at 10:12 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
Jul 14, 2023 at 8:39 AM