2.5 - lack of low down grunt

dogsbody said:

As for the PSI box I've had a nose inside but it's been infilled with resin so I can't even see the components never mind test or have a play.

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mcapinha said:

Just like mine. Early PSI Powerboxes are resin filled.
I once took the cover off to see if I could rig a way of disconnecting it by the use of a button inside the RR but there's no way past the resin

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SpudH said:

Here is a picture of the inside of mine. The little black boxs above the hose are the tune resistors. The order of the resistors along the 8 sets of legs sets the tune of the chip. I'm told (by PSI) that mine is in the highest tune state.

Take a photo of the inside of yours and post so we can compare.

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ive been searchin all morning for info to find out if my power box is set to the max lol, are the resistors in order or are they all the same but just fitted in a certain way, i cant really explain what i mean... il try another way.... are the resistors all the same value?? do you have a close up photo of the resistors so i can check against mine, thanks.

dogsbody said:

My 2000 2.5 diesel Rangie has got no go until I hit about 2,200 rpm and, I assume, the turbo kicks in.

Once she's rolling she's quite happy unless I hit a long hill like the M6 over Shap or Haldon/Telegraph south of Exeter when she gets a bit reluctant, and the temperature gauge rises out of the blue. I suspect that she hasn't got a stat but that's for another time as I want to service the heater, flush out the rad and replace the water pump all at the same time, when the weather's a bit warmer.

She's been fully serviced, all the fluids and filters have been changed and she's got a new in-tank fuel pump.

There is a PSI box on it (it was there when I bought it) but I believe that it's an older version as it has a link into a vacum pipe. There's no great difference whether this is connected or not.

I thought that I'd learn to live with this but having this sudden burst of power when I was recently pussyfooting over hard packed snow in Kent made me realise that I've got to do something before I head for Perth for Hogmanay.

So, will a new PSI box give me the missing torque? Or is there something else that I'm missing?

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