DIY Fuel Injector bench cleaning?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Kuriti, Mar 21, 2017.

  1. Kuriti

    Kuriti Junior Member

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    Hey all,

    Upon search, lots of posts asking about the dealer fuel injector cleaning, but didn't see anyone who had done it themselves. Good write up on how to replace also, but I am more curious if anyone has taken them off and cleaned them on the bench? There are some good videos out there on other Toyotas, seems pretty easy. As I replaced the PCV valve recently, the fuel rail was staring at me and this seems like it would be a pretty straightforward project. Has anybody had experience with it? Primarily, does anyone know the voltage they require? I would hate to burn one out trying to clean it. My prius kinda shudders from time to time, but no codes. This would be preventative and just because it's fun.
     
  2. ETC(SS)

    ETC(SS) The other One Percenter.....

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    Hmmmmm.
    I've seen lotsa throttle body cleaning threads but not much in the way of fuel injector cleaning, other than dealer rip-off services or the snake-oil threads.
    If you're getting close to having to change your oil, then Techron would be the exception to the rule where potions and lotions are concerned, but not by much.

    Have you cleaned your throttle body and MAFS lately?
    I'd make sure those were clean (be careful cleaning the MAFS!) and keep the injectors in the engine for now.

    Good Luck!
     
  3. Kuriti

    Kuriti Junior Member

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    Yeah, I just did it. I also sprayed some carb cleaner into the air intake before I closed things up to help the injectors. I admit the injector cleaning is probably not necessary, but that describes a lot of my projects. I would do it just for science's sake. The joy of having a car that is 11 years old with 200K is that I don't care if I break it any more. If it gets better as a result, good I can drive it longer. If I break it irreparably, good I get a new car. Win-win.
     
  4. ETC(SS)

    ETC(SS) The other One Percenter.....

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    Did you remove the throttle body to clean it?

    I do not have any experience with the G2 - or even with Priuses BUT......my experience with them is that there's really no good way to clean them while they're bolted to the intake.
    It's like cleaning a pistol without field stripping it.

    Also, you'll want to be careful what you use for the "spray and pray" method of cleaning the intake.
    There are a lot of dire warnings on the interwebs about getting carb cleaner near the MAFS, which I think are largely overblown otherwise the landscape would be littered with broken cars - but you do want to be careful how much cleaner you squirt into the intake, and what kind you use.

    GOOD LUCK!

    If you decide to bench clean the injectors, let us know how it shakes out.
     
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  5. andrewclaus

    andrewclaus Active Member

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    Ditto, and spraying TB cleaner into the air stream won't really clean the injectors, as far as I know. Why not try Seafoam or similar in the gas tank?
     
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  6. Sam Spade

    Sam Spade Senior Member

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    If an injector REALLY needs to be cleaned, you will know it......and so will the computer.
    Techron is the recommended product for routine maintenance cleaning.
    SeaFoam not so much.
     
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  7. ChapmanF

    ChapmanF Senior Member

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    As you mention it, we do have a bit of "for science's sake" research about injectors taking place on PriusChat. The idea is to have them cleaned by a specialist with dedicated equipment, who sends them back cleaned and restored (new screens, O rings, etc.) and with before/after testing results showing (a) how good or bad they were, and (b) how successful the restoration was.

    In order to skip waiting for his turnaround time, the idea is I can ship the last set he restored, you ship your set to him, and the report gets published here.

    So far there have been three sets done. One was mine (I was just curious, "for science's sake"), and the report showed mine were quite good even before cleaning, even at 204,000 miles.

    The second was from PriusChat member astrolink, who had been having driveability problems. In his case, the report did show that they were quite bad. He put in a replacement set and his problem was solved. I wound up with his original set (restored to as-new test scores, with the testing report), and that was how the injector exchange tradition got started.

    The third set was from PC member C Clay, who had driveability problems too, but the test report on his old injectors showed they were just fine, so injectors clearly weren't the problem for him. He ended up with the restored set from astrolink, but since injectors weren't his problem, that didn't solve his problem (which was quite likely to have been a leaky filler neck instead). I ended up with his already-very-good ones, restored, with the test report.

    So far, everyone participating has been a Gen 1 owner, but Gen 1 and 2 share an engine (with minor differences), and a quick check over at Village Toyota Parts shows the same injector part number 23209-21020 for all years 2001-2009 (Gen 3 owners are out of luck, or will have to start a separate injector exchange).

    Anyone who'd like to be the next participant can get the most recent set of restored injectors from me for the cost of restoration and postage, send the old ones to Rich for restoration, I pay Rich, receive the restored ones, and post the report on PriusChat. (Has to be coordinated before sending anything to Rich, so he's ready for them.)

    Our first three rounds do suggest that the injectors hold up very well, with two sets out of three so far showing sterling test results even before servicing, and only one tested set actually needing attention.

    -Chap
     
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  8. Kuriti

    Kuriti Junior Member

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    Thanks for the offer and service to the community Chap. I saw your posts after my initial post and like what you are doing. I may do this myself just for fun, but based on what you and others say, I am likely to find no issues. I think it was you who used a 9 volt battery to discharge them on the bench. If I do it myself, I think that is the tack I will take. thanks again and any other advice from you or others is appreciated.
     
  9. Robert Couchman

    Robert Couchman Junior Member

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    I know this is an old post but I am wondering if there is still a possibility of exchanging a set of injectors as mentioned. If yes, what are the particulars?
    Thanks
     
  10. ChapmanF

    ChapmanF Senior Member

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    I think I saw this too late for Robert, but yes, I still have the restored OEM injectors from the last time around (the ones with this test report). My cost was $83 IIRC. They've been on the shelf 4½ years now, so I'd have to check and make sure all four still click before passing them on. (Rich sends them back protected with a non-corroding lube, but it might have turned sticky in that amount of time on the shelf; it's really intended to protect them until they are back in the car working.)
     
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