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Thread: injector upgrade

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    injector upgrade

    I came across this add awhile back and like always, I just saved it for a later date.

    "Ford YellowTop 943 injectors, Fits YEARS/MODELS LISTED ONLY: 87-98 XJs, 87-95 YJs. 93-98 ZJ, 97-98 TJ. Plug and play. Why swap? 1:4 versus 1:1 spray ratio, smoother idle, more throttle response and gain a mpg or two. Cleaned and tested. $45 shipped for a set of 4. $50 shipped for a set of 6 and Set of 8 $60 shipped" Location: Three Rivers Michigan, 49093

    after a little looking around I have found that
    BOSH 0280150943 is the "proper number" not sure yet what model year other than it was in there V8 Mustang
    anyone ever done this cross over/upgrade?
    or heard of this said upgrade?
    a learning experience is one of those things that says, you know that thing you just did...don't do that again.

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    ok so, seeing as I'm at work and nothing to do, I have decided to investigate this some more..

    87-98 XJ with 4.0L use EV1 injectors, cross over to BOSH# 0280155703 (yellow top) found in 95-97 neons 2.0L
    99-01 XJ with 4.0L use EV6 injectors, cross over to BOSH# 0280155784 (yellow top) found in 98-01 Caravans, Voyagers, Neons, Stratus, Breezes with 2.4L.

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    injector upgrade

    I don't remember the part number (obviously not the same as I have an LJ) but I did ford injectors of some flavor. (got them from Lil loco) I never saw a mileage increase or even sheet of the pants HP increase (shocking I know, a bolt on part that doesn't live up to the Internet's claims? However the thing it did down was smooth out the idle a bit, to me, that was worth it alone. But I got em for cheap so...
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    I used the ones from the 2.4 stratus and did notice a smoother idle and slight throttle responce.
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    I did the swap to the ford 4 hole injectors, smoother idle, maybe a bit better throttle reponse. But the ones I replace were original with 190k on them so who knows
    99 TJ

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    a lot of the xj guys are doing this.
    87-96 xj guys use the 703 from a stratus/cirrus (i got mine from scrapyard from a cirrus)
    97-01 xj guys use the 784 from a neon

    when i first heard of this, i looked at every neon in the scrapyard and they were all 784 so i found my 703 from the cirrus. i installed them into my renix and yeah, i did get smoother idle and maybe a bit better throttle response. no horsepower or mileage increase noticed.

    would i do it again, sure. i have a few xj's and will upgrade the others, but will likely leave the tj's alone, unless i get a leaky injector.
    proud OF4WD member #3875

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    If your BONE stock then these can have a good effect but I wouldn't just go with them if it were me without matching flow rates especially because stock injectors are not the best injectors from the factory...

    According to a site I use for referencing injector sizes these are the specs and by no means am I saying this is the be all end all absolute info and is just for reference:
    0280155703 are EV1 16.75lbs@43.5psi which is 15.85lbs@39psi or 17.7lbs@49psi
    0280155784 are EV6 21.3lbs@43.5psi which is 20.35psi@39psi or 22.8lbs@49psi

    What does make a difference is the 4 hole nozzle versus the single hole nozzle...

    I would be checking the Flow rate of the injectors you have now before just throwing in a set that are suppose
    to be better which may or may not be the case but if you don't know where your starting how can you know its truly a better option...
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    I am still thinking of doing this upgrade? anyone else have any input on this???

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    The injectors that I got incidentally came with pig tails so you could rewire your old style harness to the new injectors. You are welcome to em if I can track them down still.

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    let me know, this is something that I want to do, don't need to do...

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    I'll do some digging, I think I know the general area they may be in...

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    Found em, and as it happens I'm heading for the hammer. I'll pm you my number

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    fart on way to trailer...

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    No worries, I left em with Banger.

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    awesome

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    I've read about it multiple times on different sites and the conclusion I mostly saw was 'no real performance improvement'

    pretty much the same waste of time as a 'cold air intake' or the 'throttle body spacer' etc
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    Quote Originally Posted by sk8snwmx View Post
    I've read about it multiple times on different sites and the conclusion I mostly saw was 'no real performance improvement'

    pretty much the same waste of time as a 'cold air intake' or the 'throttle body spacer' etc
    4 spray nozzle are thought to have a much better spray pattern for better throttle response and fuel burn. I was never looking at doing this upgrade to get "performance improvement" or "fuel improvement" more of hey if it will burn better and they are an inexpensive upgrade. Why not give it a try. Will need to locate # 24 injectors. early YJ's ran a #19 injector and some later YJ's ran with a #21. My research if I understand it, my computer will be fine with that size. Any bigger and I will need to add a fuel pressure regulator.
    Yellow top from early 2000 will work (dodge neon's run yellow top #21) , but the best to get if you can locate them is #24 blue top injectors from a SVT mustang 5.0, '93-'95 model year.
    Both are a direct plug and play....

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    Quote Originally Posted by cheezy View Post
    My research if I understand it, my computer will be fine with that size. Any bigger and I will need to add a fuel pressure regulator.
    but the best to get if you can locate them is #24 blue top injectors from a SVT mustang 5.0, '93-'95 model year.
    Both are a direct plug and play....
    Not exactly... Injectors are spec-ed to be a certain Lbs@ a certain PSI so when you run larger injectors on an other then designed PSI then the injector will be smaller or larger then originally intended so this is a good way to have a little more flexability into injectors...

    The 24# ford Injectors are a good option and I think I have a set kicking around if I haven't sold them off already as I am now running 26lbs injectors...

    the multi hole injector has a much better spray pattern which helps atomize the fuel and you can watch YouTube video's showing the difference...

    An adjustable Pressure regulator is a Great idea to have on your rail (and not expensive either if you know where to get one) if your a return line system (up to 96 as 97+ went return-less)
    and that allows you a little more adjustability to fine tune your injectors if you have a 97+ you will need to install a return line to the tank or an adjustable regulator wont do anything (learned this the hard way)

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    well Alex, I may need to stop bye your shop and pick your brain some more...

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