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Thread: Life of lpg injectors

  1. #11
    Join Date
    Jun 2013
    Location
    Sydney
    Posts
    102
    Hi Pedro,
    The ecu was for a 4.6 but will also suit a 3.9. The cost was about $380ish landed. I donít have the part number, I sent them a photo of the original. It came with leads and a link for the latest software, install is basically plug and play with a little tuning, this was done at Graeme Coopers. I donít have any pics of the new unit but this is the original.

  2. #12
    Join Date
    May 2003
    Location
    Sunny Coast QLD
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    26,874
    What was the original ECU doing wrong?
    "How long since you've visited The Good Oil?"

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  3. #13
    Join Date
    Jun 2013
    Location
    Sydney
    Posts
    102
    Not switching to gas. We tried to re boot the ecu and re install software but no go.

  4. #14
    Join Date
    Oct 2017
    Location
    Phillip Island
    Posts
    66
    Daft question, how do you test them ? We've clocked up 250k on the gas injection system that still pulls cleanly, idle is slightly rougher than when first installed but we're also talking about a 400k engine. The system starts on petrol and cuts to gas when warm, it used to be a silk smooth cutover that could be done at full throttle now its misses once on cutover and then runs ok. I'm wondering if its just general wear and nothing to worry about or are the injectors due to be replaced.

  5. #15
    Join Date
    Jun 2013
    Location
    Sydney
    Posts
    102
    Iím not a mechanic so a lot of that is left to the eggberts. Iím not sure you can test an ecu without specialist equipment. As far as injectors are concerned, maybe Bee Utey can answer this one.

  6. #16
    Join Date
    Apr 2009
    Location
    Crafers West South Australia
    Posts
    11,333
    Quote Originally Posted by Zcoota View Post
    Daft question, how do you test them ? We've clocked up 250k on the gas injection system that still pulls cleanly, idle is slightly rougher than when first installed but we're also talking about a 400k engine. The system starts on petrol and cuts to gas when warm, it used to be a silk smooth cutover that could be done at full throttle now its misses once on cutover and then runs ok. I'm wondering if its just general wear and nothing to worry about or are the injectors due to be replaced.
    Most software packages let you shut down one LPG injector at a time and run that cylinder on petrol. That lets you isolate a crook injector. Sometimes back flushing them with throttle body cleaner helps. Looking at the tuning with a laptop lets you see from the injector times how far out of tune your LPG is. A simple thing to try is to adjust the regulator pressure if you can find the screw, as often wear drops their delivery pressure. Setting up your own laptop with the correct software is the best method though, nothing beats seeing live data as you mess around.

  7. #17
    Join Date
    Oct 2017
    Location
    Phillip Island
    Posts
    66
    Quote Originally Posted by bee utey View Post
    Most software packages let you shut down one LPG injector at a time and run that cylinder on petrol. That lets you isolate a crook injector. Sometimes back flushing them with throttle body cleaner helps. Looking at the tuning with a laptop lets you see from the injector times how far out of tune your LPG is. A simple thing to try is to adjust the regulator pressure if you can find the screw, as often wear drops their delivery pressure. Setting up your own laptop with the correct software is the best method though, nothing beats seeing live data as you mess around.
    Not a bad idea getting the software, I'll track it down. I didn't realize you can shut sown an injector at a time, that's a handy feature. Thanks for the idea.

  8. #18
    Join Date
    Apr 2009
    Location
    Crafers West South Australia
    Posts
    11,333
    Some cheap spare parts for someone...

    Vapour injection LPG kit - Suit Ford AU 4.0l | eBay

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