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  1. P38tyro

    P38 Diesel PSI tuning box. Hot/cold start problems

    Hi Kev, I hasd similar problems to yourself. I have a PSI Power Box fitted on mine too, but as it turns out it is not the problem. Firstly, with the ignition switched off, disconnect the round PSI Power Box connector with I think 7 pins, clean up the pins give it a good shot of WD40 and...
  2. P38tyro

    P38 2.5 diesel, Re-mao or psi box???

    Have a PSI Power Box on mine too, but have no instruction book or documents on it, do you have yours? :o I am reliably informed that the the instructions show how to tweak it for best economy or performance. Having fitted a performance cone filter and sorted out the tatty plastics and smoothed...
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