Why You Should Check Your Fuel Injectors

Discussion in 'Mazdaspeed 3/6 Fuel, NOS, Meth, & Water Injection' started by Solarsurge, Aug 17, 2018.

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  1. Solarsurge

    Solarsurge Greenie Member

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    I really wish I got a picture of this injector BEFORE the seemingly fossilized, encrusted "stream" of brown crud that was attached to the nozzle tip broke off, but as you can see by the copious amounts of brown crud all over this thing that it was pretty dirty. This came out of an engine that was actually running fine. So, it's a good idea to check and clean your injectors and replace the seals just because. Personally, I'd do this every 50k miles. The OEM seals are shit. Period. And it gets incredibly gunky all over the injectors over time, which WILL cause performance issues eventually.

    YUMMY.jpg
     
    Last edited: Aug 17, 2018
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  2. Sho

    Sho Silver Member

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    Agreed.

    This is how mine looked after 40k on E48. Had them cleaned prior to running E48...
    received_10211750423502545.jpeg received_10211748248648175.jpeg

    Post cleaning and with upgraded stainless filters
    received_10211750421062484.jpeg
     
    Sho, via a mobile device, Aug 20, 2018
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  3. Solarsurge

    Solarsurge Greenie Member

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    Solarsurge, via a mobile device, Aug 20, 2018
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  4. Sho

    Sho Silver Member

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    Cleveland Injector Hospital.

    Local to me and same day turnaround
     
    Sho, via a mobile device, Aug 20, 2018
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  5. Solarsurge

    Solarsurge Greenie Member

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    Damn. I wish I had someone local. Closest place for me is North Carolina. How much do they charge?


    Sent from my iPhone using Tapatalk
     
    Solarsurge, via a mobile device, Aug 20, 2018
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  6. Sho

    Sho Silver Member

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    Not sure I get friend pricing haha. So I just pay for the filters and whatever supplies he uses
     
    Sho, via a mobile device, Aug 21, 2018
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  7. Youngwonder

    Youngwonder Greenie Member

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    I sent mine to Injector Rx. They had a quick turnaround.
     
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  8. mituc

    mituc Greenie Member

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    What injector seals do you have? Get the CS or CP-e ones and you will never have to pull your injectors for the reason mentioned in the 1st post.
     
  9. Sho

    Sho Silver Member

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    Those were cpe. You think I'm dumb enough to not run an upgraded seal, considering my motor has 83k miles and all above 500whp !? Lol. The seals are still on 2 of the Injectors in the first 2 pics
     
    Last edited: Dec 30, 2018
    Sho, via a mobile device, Dec 30, 2018
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  10. mituc

    mituc Greenie Member

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    Oh, ok... however it looks like they weren't sealing properly. When I got my CP-e seals they suggested to add some silicone on them (I don't recall, I only remember I bought the exact one they mentioned).
     
  11. Awafrican

    Awafrican Moderator Gold Member

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    Clean your Injectors folks 125k km

    Before
    PXL_20210331_213610518.jpg PXL_20210331_212836973.jpg

    After
    PXL_20210402_173836448.jpg

    Testing PXL_20210402_160030279.jpg PXL_20210402_160040169.jpg
     
    Awafrican, via a mobile device, Apr 8, 2021
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  12. DubC

    DubC Greenie Member

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    what kind of place cleans injectors? just any random shop? i assume it's not DIY else people here would be doing that. will have to look into seals. my car has around 51k on it.
     
  13. Awafrican

    Awafrican Moderator Gold Member

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    InjectorRxnis a good place in the idea, graveyard performance offers cleaning and core service for no down time, I found a local guy to me that's all he does there's also a local performance shops around that offer it heck Mazda has a display saying clean your Injectors so I'm sure they could probably point you in the right direction for a local shop too
     
    Awafrican, via a mobile device, Apr 9, 2021
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  14. DubC

    DubC Greenie Member

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    thanks for the info. i found a youtube vid that shows a guy removing them (i honestly forgot that they were under the intake manifold...fuuuuck. and he cleaned them himself with a very soft scrub pad. i'm not sure that's the best way to do it, but that's just how he did it.

    also he did not use a puller for his. he just pryed the rail off and took off a few bolts and apparently just pulled them out. did anyone need to use an injector puller? i see CS pushing theirs when you look at their seals. i'm assuming those CS seals are the ones to get after reading a few old threads.
     
  15. Sho

    Sho Silver Member

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    A scrub pad does nothing. Cleaning the outside does nothing.
     
    Sho, via a mobile device, Apr 9, 2021
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  16. StayFrausty

    StayFrausty Frok Greenie Member

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    Go Overspeed seals. Can get some when you send your injectors to graveyard.

    I tho
    I thot cpe’s seals were the ones that tended to fail? Or am I wrong
     
    Last edited by a moderator: Apr 9, 2021
    StayFrausty, via an iPhone, Apr 9, 2021
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  17. Sho

    Sho Silver Member

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    All of em can fail if you dont tq them properly and dont have a clean surface inside the head.

    I personally reused those cpe seals 3-4 times before they started leaking and have reused overspeed seals 2 times so far with success. Upgrading to the nut/stud combo over the stock torx units helps as well as you can actually properly torque everything down
     
    Sho, via a mobile device, Apr 9, 2021
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  18. DubC

    DubC Greenie Member

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    looks like a nice service. and those seals look to be about on par, cost wise, with others i've seen. seems like a good winter project when i can also check the valves again. that way if their turnaround is on the long side i won't have to have the car sitting. thanks for the tips and suggestions!
     
  19. DubC

    DubC Greenie Member

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    just thinking here...y'all think that cleaning/upgrading these seals would get rid of all (if not, most) of KR? not sure what else could cause KR as i'm not a pro at all the inner workings.
     
  20. StayFrausty

    StayFrausty Frok Greenie Member

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    It could be A cause yea
     
    StayFrausty, via an iPhone, Apr 12, 2021
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