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Thread: PR5 cranks but won't start

  1. #1
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    Angry PR5 cranks but won't start

    So I'd like to begin with sup ya'll I'm new to the forum I've only looked at these things never really joined or posted to any of them.

    I recently bought an '02 protege5 with 155000 miles on it it had a blown motor, so I swapped the engine, but it won't start, I double checked all connections everything is in its place. The engine cranks with a slight whine at first then continues kick'n, but it will not start the timing belt is good, all fluids are topped off and I've got power to everything.

    Q?: What else could be the cause for it not to start?

    Make: Mazda
    Model: Protege5
    Engine: 2.0L 16 valve DOHC off an 03 Protege with about 90,000 miles
    Color: Lellow (Yellow)
    Last edited by spifco; 07-14-2012 at 06:27 PM.

  2. #2
    Registered Member zhy's Avatar

    I aint even mad!

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    Check your fuel pressure.
    also check for corroded coilpacks and change your spark plugs
    that shuold help!
    Follow my build/progress thread here!


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  3. #3
    Registered Member tweety2300's Avatar

    2001 mazda protege mp3

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    +1 gotta make sure it's getting fuel and spark before anything else

  4. #4
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    okay so I checked everything all over again. took the liberty to change the timing belt and triple check the wiring, I do have fuel pressure and i do have spark, but no dice. I think I may have flooded the engine with gas cause man oh man does it wreak of fuel. I had new plugs on the car and put the old ones back in. I did however notice a bit of moisture on one of the plugs I pulled out. What could caused that? I looked in the plug chamber and could not see anything.

  5. #5
    Registered Member tweety2300's Avatar

    2001 mazda protege mp3

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    Gas

  6. #6
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    So here Is a vid of what it's sounds like. I hope it helps.

  7. #7
    Registered Member wallabe's Avatar

    2002 Mazda Protege5

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    Hope this helps







    Last edited by wallabe; 07-15-2012 at 08:03 PM.

  8. #8
    Registered Member tweety2300's Avatar

    2001 mazda protege mp3

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    To me it sounds like a timing issue

  9. #9
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    Engine has bad head gasket water is leaking into combustion chamber. Oh well on to head gasket.

  10. #10
    Registered Member javestack's Avatar

    2006 Subaru Impreza 2.5i

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    Quote Originally Posted by spifco View Post
    Engine has bad head gasket water is leaking into combustion chamber. Oh well on to head gasket.
    I was about to say check compression when I read this. Makes sense.

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  11. #11
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    So I've swapped out the gasket and cleaned the head, ran some oil through the engine to remove any water left behind. Now I seem to have a rough start and a quick shut off unless idle high. Should I run some sea foam through the crank case to assist the water evaporation and cylinder lubrication.

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  12. #12
    Registered Member javestack's Avatar

    2006 Subaru Impreza 2.5i

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    Antifreeze being burned with the fuel while the head gasket was going could have damaged your O2 sensor causing the EFI to run an incorrect amount of fuel, therefore rough start and incorrect idle speed.

    Are you still tripping your CEL? If so, you need to get it read somehow. That will tell you a lot.
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  13. #13
    Registered Member wallabe's Avatar

    2002 Mazda Protege5

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    Sounds like the motor is getting too much air. Check your air intake. You can get a $30 ODB II reader from Autozone. Need be I will post the service for you.
    Last edited by wallabe; 07-21-2012 at 03:55 PM.

  14. #14
    Registered Member tweety2300's Avatar

    2001 mazda protege mp3

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    Did you hook up all the vaccume lines? Sounds like a big vaccume leak if the idle is rough but runs fine

  15. #15
    Registered Member spifco's Avatar

    02 Mazda Protege5

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    Well its a rough start but won't remain on unless I keep it above 2000 rpms. So I re-gapped the spark plugs. here is a video update.
    Last edited by spifco; 07-21-2012 at 10:37 PM. Reason: video post

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