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Thread: Fuel Injector upgrade

  1. 12th September 2013, 04:16 AM #1
    Gippslander's Avatar
    Gippslander
    Gippslander is offline Master Supporter
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    Fuel Injector upgrade

    I am trying to improve my fuel economy in the P38 with a 4.6 Gems engine and have read that you can fit different fuel injectors which supposedly increase fuel economy. The article mentioned people in Australia having great success fitting different units with four holes as opposed to the original units having only one hole. Can someone please help with this issue are there injectors to suit and where do i get them.
    The injectors referenced were all Bosh Gen III

    [QUOTE][/From my research you can fit either a mid 90's Ford Mustang 5.0 "yellow" Bosch gen III injector (part # 0280155700 or 0280155710) or a Bosch Gen III Red Devil (part # 0280156013). You can find both on Ebay while the yellow ones are easily available and can be had used rebuilt and matched for about $100/set of 8. The Red Devils I couldnt find used and come new for about $36 an injector or about $280 for a set. The yellow injectors are 19lb bosch gen III, with matching impedance and connection. The Red Devil is a 22lb bosch gen III with matching impedance and connection but also allows for our stock fuel rail clip to be used to lock the injector top into the fuel rail.QUOTE]

    This is the reference but it is American and not sure it is suitable for my engine.
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  2. 12th September 2013, 06:30 AM #2
    PhilipA
    PhilipA is online now Swaggie Subscriber
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    You can use Bosch gen11 Yellow 19Lb which have the slot for the top clip or Bosch gen111 which have the same function and 4 holes but are physically smaller and do not have the slot for the top clip.

    In my case with a 14CUX rail, I added another oring above the one at the bottom to ensure the top of the injector did not pop out of the rail.

    BTW the gen111s will give more stable idle , but unless your old Lucas are dribbling I doubt whether you will see much better economy. If the car has done lots of Ks you may see better economy, but usually by that stage there are lots of other wear areas eg cam, lifters.
    Regards Philip A
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  3. 12th September 2013, 06:44 AM #3
    TheTree
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    Hi,

    I must agree with Philip on this one, if your motor has high KM's on it, replacing the injectors is unlikely to have much effect sadly.

    About all you can do is ensure that you have;
    good plugs, properly gapped
    good air filter
    clean MAF
    clean PCV system

    You can also use a generic OBD reader and software to check for engine fault codes

    Good luck!
    Steve
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  4. 12th September 2013, 11:20 PM #4
    33chinacars
    33chinacars is offline Wizard Subscriber
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    New set of ignition leads wont go a stray either

    Gary
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