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Thread: Help with fuel pump adjustment

  1. 8th August 2013, 03:06 PM #1
    Petetheprinta's Avatar
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    Help with fuel pump adjustment

    I recently purchased a performance intercooler, finally managed to install "minor modifications needed" ye right pigs can fly too!! Followed suppliers instructions for fuel pump adjustment and getting nowhere.

    Instructions call for removal of 4 screws on cap of compensator, carefully remove rubber diaphragm and shaped pin below, move pin somewhere between small step and large step giving me compensation for leaner mixture provided by intercooler.
    Did all that and decided not happy with vagueness of instructions. Perused forum and found Ian Petersons guide. Realized I was way out of my league.

    Question is how do I know when I am back to original setting so I can start again?? No I didn't take note of "centre punch reference mark" as supplied instructions didn't call for it.

    Do I just assume that small step should be facing front in which case reference punch is at 3 o'clock position and start from there? Ian is a bit ambiguous in regards to this as he says his original position was at 12 o'clock (page 3) and then on page 7 says his original position was 8 oclock

    So...where do I start?? Remembering I am mechanically disadvantaged.

    Cheers, Pete
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  2. 8th August 2013, 03:17 PM #2
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    I am assuming a 200tdi or 300tdi but you might want to clarify what engine and vehicle you are talking about.

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  3. 8th August 2013, 04:08 PM #3
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    Assuming you're talking 300TDI there is an excellent guide on tweaking the pump. I have the link at home, but I'm on my phone now. If no one else posts it ill get back to you.

    One thing thing the guide says is mark all pieces before adjustments so you can return to original... Do I see an "uh oh" moment coming up?
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  4. 8th August 2013, 04:38 PM #4
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    Quote Originally Posted by garrycol View Post
    I am assuming a 200tdi or 300tdi but you might want to clarify what engine and vehicle you are talking about.

    Garry
    OOPS sorry folks I know what I have, I assumed everyone else did
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  5. 8th August 2013, 04:42 PM #5
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    Quote Originally Posted by Judo View Post
    Assuming you're talking 300TDI there is an excellent guide on tweaking the pump. I have the link at home, but I'm on my phone now. If no one else posts it ill get back to you.

    One thing thing the guide says is mark all pieces before adjustments so you can return to original... Do I see an "uh oh" moment coming up?
    Hi Judo, I have the guide you are talking about (see my original post) however I followed manufacturers instructions which was patently wrong. I now need to know how to get back to original settings, or close. Thanks.
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  6. 8th August 2013, 04:54 PM #6
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    Ahh I wasn't sure if you meant a different guide.
    - Justin

    '95 Disco 300TDI - sold
    '86 County 110 Isuzu
    2006 Range Rover Vogue td6
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  7. 8th August 2013, 05:40 PM #7
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    Quote Originally Posted by Petetheprinta View Post
    Hi Judo, I have the guide you are talking about (see my original post) however I followed manufacturers instructions which was patently wrong. I now need to know how to get back to original settings, or close. Thanks.
    easy

    pull the whole pin assembly out of the housing, you'll notice an orifice with a pin that comes out and rides on the pin. (its on the "front of engine" side of the pump on a tdi)

    look at the pin (its actually an eccentric ground taper cam) see the wear mark on the tapered face?

    line that up the wear mark with the orifice

    theres your factory setting.
    Dave

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  8. 9th August 2013, 11:37 AM #8
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    Quote Originally Posted by Blknight.aus View Post
    easy

    pull the whole pin assembly out of the housing, you'll notice an orifice with a pin that comes out and rides on the pin. (its on the "front of engine" side of the pump on a tdi)

    look at the pin (its actually an eccentric ground taper cam) see the wear mark on the tapered face?

    line that up the wear mark with the orifice

    theres your factory setting.
    Brilliant, thank you..it really helps when someone knows what they are doing. I will return it to factory and start from there. If you are ever in Adelaide, let me know I owe you a beer.
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