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Thread: Another TB42 to TD42 Conversion

  1. #191
    Patrol God threedogs's Avatar
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    Quote Originally Posted by Andyh View Post
    As a last ditch attempt to solve my tacho problems, does anyone on here know if the tacho from a series II GQ patrol 2.8 is the same as a TD42 Series II tacho, the two tachos i got supplied from the wreckers are out of 2.8's THIS IS MY LAST IDEA ! . LOL

    Help... Please.. Anyone.. lol
    Get onto Mudnut I think,He's the man to PM
    Is there a resistor or anything that you solder in line to
    help convert from 2.8 to 4.2 diesel?
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

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    Andyh (26th June 2015)

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  4. #192
    Patrol God mudnut's Avatar
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    Andy, further to the PMs I sent,
    My computer screen is so stuffed
    that I can't get clear pictures of
    the TD42 wiring.
    I have looked at the Haynes
    Manual and on Page 12-18.
    It is vague about identifying
    which engine it is for.
    It shows that the sender has
    two wires to the gauge and a
    third connection to earth in parallel
    to the fuel, oil and temp gauges
    via the circuit board.
    When you tried the two straight
    wires to the tacho, did you
    disconnect the original
    wires from the
    plug to eliminate any fault.
    Last edited by mudnut; 26th June 2015 at 09:38 AM.
    My advice is: not to follow my advice.

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    Andyh (26th June 2015), threedogs (26th June 2015)

  6. #193
    Expert Andyh's Avatar
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    Thanks for the above Mudnut,

    Yes the original wires are no longer connected at the cluster plug / pcb.. (The EFI only had one original wire (Yellow & Black) in pin 12, this was removed as it went to the Coil where the original petrol pick up was located.
    All other gauges in the cluster are working 100% which indicates that the live and earth parallels are ok.
    She'll be right mate
    it's a GQ

  7. #194
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    Quote Originally Posted by mudnut View Post
    Andy, further to the PMs I sent,
    My computer screen is so stuffed
    that I can't get clear pictures of
    the TD42 wiring.
    I have looked at the Haynes
    Manual and on Page 12-18.
    It is vague about identifying
    which engine it is for.
    It shows that the sender has
    two wires to the gauge and a
    third connection to earth in parallel
    to the fuel, oil and temp gauges
    via the circuit board.
    When you tried the two straight
    wires to the tacho, did you
    disconnect the original
    wires from the
    plug to eliminate any fault.
    I have an older laptop here that i was going to use in the garage only that you are welcome to Craig...

  8. #195
    Expert Andyh's Avatar
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    Ok so the project apart from a tune up is complete, I think….

    I have kind of admitted defeat for the time being on a tacho but as the one I have fitted functions over 1100rpm I am just going to live with it for now until I can suss out what I am going to do, i did do some tests but had no help at all so i couldn't get a reading off the tacho wires (sorry Mudnut) but seeing as the tacho is working rev wise i assume the sender to be fine..

    So here it is the good news……

    I had the car engineered by VASS successfully, and thus pooy conversion was passed by the engineer and a modification plate fitted, so before anyone had a chance to change their minds, I then headed to VicRoads and handed a copy of the engineers report to the customer service people who then came out to observe the engine number in the car and the modification plate attached.

    Result - My truck is now 100% legal 4.2 turbo intercooled diesel with 3” exhaust, bulbar, winch, light bar, roof rack, rear draws, 33’s and a 2” lift weighing in at 2550KG.

    20150629_152600.jpg 20150629_173526.jpg

    I am very happy and can now drive very confidently through any police checks with my head held high.

    20150627_151434.jpg

    Ok so next is some final tweaks, I have now fitted my T boost controller and my straight through 3” exhaust section (removing the center muffler) and will be giving it a dyno tune this weekend so I can ensure that the thing is running as well as it can be on a standard pump.
    Last edited by Andyh; 30th June 2015 at 08:02 AM.
    She'll be right mate
    it's a GQ

  9. The Following 3 Users Say Thank You to Andyh For This Useful Post:

    Bloodyaussie (30th June 2015), katwoman (2nd July 2015), Winnie (30th June 2015)

  10. #196
    Patrol God
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    Brilliant stuff mate....... the hard part is over and now its just a bit of fettling to get the small things sorted, oh and of course the never ending maintenance ...lol

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    Andyh (30th June 2015)

  12. #197
    The 747 Winnie's Avatar
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    Woohoo! Congrats mate!

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    Andyh (30th June 2015)

  14. #198
    The master farter
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    Awesome stuff there mate. Who did the engineers for you mate? As for the tacho. The is a mob in ringwood who do speedo's etc etc . Cant remember who they are though. Might be worth ringing them and having a chat...
    Edit : they are called Ringwood speedo service...
    Sent from my SM-P600 using Tapatalk

  15. #199
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    hey it sounds like you have had your fair share of hassles . really excited to hear it is a goer. I just got my engine back from the engine machinist in pieces ,so the assembly begins. Good luck with the tacho, i'm sure you will suss it out .Are you happy with the performance. Please say yes i have to look forward to mine getting finished .

  16. #200
    Expert Andyh's Avatar
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    Ok, so i had my first trip up to the Nissan Club property this weekend, i was a little nervous driving it all that way for the first time, and being a new motor on a freeway i had to vary my speed and keep giving it full peddle to bed in the rings.

    The truck ran great no problems at all apart from some fuel needed (I think my 10 mm pump is ok but at speed and full boost she struggles to put the fuel in.
    I have had it tuned but they never hooked up my boost T so i think i will put that on and give the fuel screw just a little tickle and see if ia cant get the boost up to 18 psi and give it a little more diesel. if not i will have to live with it until i can afford a pump upgrade.
    Having checked the oil and coolant level when i got there and then again when i got home, i found it wasn't leaking or using any oil or leaking any coolant at all..

    Overall the truck sounds awesome and loves the low range torque.

    I didn't get any pics or video as i was just doing a break in run. i will however put up a movie of it in action as soon as i can.

    I will be fitting my turbo timer and boost t this weekend and doing my first oil change.
    She'll be right mate
    it's a GQ

  17. The Following 3 Users Say Thank You to Andyh For This Useful Post:

    Bloodyaussie (6th July 2015), mudski (6th July 2015), Winnie (6th July 2015)

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