I took delivery of my new XR6T on the 13 December and have been looking under the bonnet ever since. The hose running from the pressure side of the air pump over to the waste gate passes through an electric valve or switch of some sort. This switch is mounted to the side behind the battery and is hard to get your hand to because of the turbo hoses. The point is, the switch has a two prong connector that is not connected to anything! :o On closer inspection, tucked away and taped back to the wiring harness is the section of wiring that obviously plugs into this switch. Why would Ford not connect this switch to the wiring harness? I plugged it in to see what happens. I don't think it made any difference, but my son reckons the turbo makes more noise with the the wire pugged in. Any body got any answers or is mine the only one ex factory that is not connected? Also has any body fitted a boost gauge yet? I'm going to put one in just to see what is going on. I was going to put a tee piece into the wastegate hose mentioned above and connect the boost gauge hose into that.

Ill take a look at mine later.. dont think im going to ruin the interior with gauges on this one.. the car is way too nice..

The hose running from the pressure side of the air pump over to the waste gate passes through an electric valve or switch of some sort. This switch is mounted to the side behind the battery and is hard to get your hand to because of the turbo hoses. The point is, the switch has a two prong connector that is not connected to anything! :o On closer inspection, tucked away and taped back to the wiring harness is the section of wiring that obviously plugs into this switch. Why would Ford not connect this switch to the wiring harness? I plugged it in to see what happens. I don't think it made any difference, but my son reckons the turbo makes more noise with the the wire pugged in. Any body got any answers or is mine the only one ex factory that is not connected?

Get your hands on the service manual. There should be an electrical diagram in there. It may give you some clues

The point is, the switch has a two prong connector that is not connected to anything!   On closer inspection, tucked away and taped back to the wiring harness is the section of wiring that obviously plugs into this switch. Why would Ford not connect this switch to the wiring harness? I plugged it in to see what happens.

Ok son, there is this big red button next to that complicated machine.... while I'm gone do not push it... :lol: :lol:

Ok son, there is this big red button next to that complicated machine.... while I'm gone do not push it... :lol: :lol:

What's this button do........

Reminds me of the Chief saying to Max Smart - - "Remember Max don't pull that lever......"

I can't see any control on the boost pressure other than the standard method of running a hose from the pressure side of the airpump to the wastegate controller. Boost pressure acts against a spring until it overcomes the preset spring pressure and the wastegate starts to open. There is the valve or switch that I found that connects to the EMS (I presume), but that has been disconnected as I said before. Have you had a look at yours yet CJF077? It looks to me like a bleed valve, or pressure regulator of some sort in the hose would increase the boost pressure, however there must be a sensor somewhere that measures that pressure and tells the EMS. Where is it?

Scott52 what am i supposed to be looking for? i tried looking for what you mentioned but couldnt find anything

Scott52 what am I supposed to be looking for? I tried looking for what you mentioned but couldnt find anything

Perhaps Scott52 could post a pic fpr all to see?

The switch that u r talking of here is merely a temperature sender switch ive taken the whole switch out and had a look at it and had it confirmed also with what it is if u disconnect the car still runs no problem there are no pressure gauges in the car an easy place to get presseur is to put a tT piece that goes to blow off valve u cant miss it it is there that where I got mine from

The switch that u r talking of here is merely a temperature sender switch ive taken the whole switch out and had a look at it and had it confirmed...

So why would Ford install a temperature sender and then not use it