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    #1

    Engine knock after getting gas?

    Hey guys, I'm new here! Just bought a 03 rusty protege 5 and I'm frankly terrified. I was gonna fix body on car, it was running very well and driving great etc. Then I put 20$ of 87 in at the gas station and drove home. Then pulled in garage and noticed this like knocking sound (maybe not a knock but it goes with the revs and no codes and seems to drive exactly the same) oil it still at the full mark and no overheating etc. Is it a bad alternator bearing? Did I get bad tank of gas? Please help me save my car!

    Thanks

    http://youtu.be/lZTQf_fJU3k


    Any tips would be much appreciated

    Sent from my Galaxy Nexus using Tapatalk
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    #2
    non Turbo fdse? sounds like bad gas.
    bp swapped escort lx, gtr ecu, gtr intake manifold, A code VAF, rx7 460cc injectors, ky clutch, holset hy35 turbo on 8lbs, 38mm tial wastegate, ramhorn manifold, full 3 inch ss exhaust, walbro 255 fuel pump

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      #3
      It is a non turbo

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        #4
        Sry what does fdse mean?

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          #5
          He meant FS-DE. That's the engine designation for the 2.0 L engine used in the Protege and the P5 from 2001-2003. The FS-DET is the turbo version of the engine.

          For more information, go to:
          http://www.wihandyman.com/forum/showthread.php?51138


          Happy Motoring!
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            #6
            Ohhhh cool, my bad I'm just trying to get used to the Mazda life lol. First Mazda

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              #7
              Used to have hondas

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                #8
                yea I meant fs-de.
                bp swapped escort lx, gtr ecu, gtr intake manifold, A code VAF, rx7 460cc injectors, ky clutch, holset hy35 turbo on 8lbs, 38mm tial wastegate, ramhorn manifold, full 3 inch ss exhaust, walbro 255 fuel pump

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                  #9
                  It's really hard to determine the cause from the video. To me, it sounds like a small exhaust leak at the manifold, but I could be way off. It doesn't sound like a lower end bearing, I had one fail in an FS, and it was more like a hammer hitting the block type sound. I'd try and figure out where in the engine bay the sound is coming from, we could maybe help you out further then.
                  sigpic
                  1992 Familia GT-X
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                    #10
                    Hang on I'm gonna take a video for you guys!

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                      #11
                      Heres your video way easier to hear it.

                      Mazda protege5 weird engine noise
                      https://www.youtube.com/watch?v=HYAnAEsT2QM&list=UULJ_9uNQW--E795eb9pNFhw
                      Any idea what this noise is?

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                        #12
                        Does this sound like the alternator going? I need an answer before tomorrow cause if replacing alternator doesn't work I'm out 200$ lol

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                          #13
                          Sounds like bad gas if you are positive it started right after filling up. You are pinging from pre-ignition, or as most people know it, spark knock.

                          EDIT: Went off your description before watching the video. That sounds constant, kinda like a main bearing knock. Check your oil for excessive shavings. If it has a grayish look with a lot of flakes, you have a bearing that's most likely about to spin or already has.
                          Last edited by DeeAOne; 04-14-2014, 01:05 AM.


                          '88 323 sedan, K-swapped..

                          '03.5 Mazdaspeed Protege - miss it so much..

                          '01 Dodge Ram 3500 Cummins - 323 hauler

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                            #14
                            Alright its still doing it a few weeks later. Hasn't gotten better hasn't gotten worse . no issues with oil

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                              #15
                              sounds like either the power steering pump or a/c compressor bearing!!

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