Volvo Panta D3 REV range question

[Burkstar]

You won't get much of a boost sensor reading with it stationary, you need to be in gear and the engine loaded, just to point out the actuator on a D3 doesn't operate a wastegate, its a variable nozzle turbo and the actuator operates the nozzle which gives a more constant turbo boost from lower rpm's than a normal turbo.
The boost sensor is low down at the front of the charge air cooler, if you follow the dipstick tube down its near the bottom of that and just aft.
you are right in that turbo boost is entirely dependant on the fuel supply, you have to have burnt fuel to get exhaust gas to drive the turbo, so if you can eliminate the fuel delivery side, then it could be the boost sensor as this detects boost pressure and tells the ECU to add more fuel as req'd. You can check the actuator is working by looking at it while someone drives the boat and hits the throttle, the actuator has its own control valve which controls the air to the actuator capsule, and if you follow the rubber tube back its located at the rear of the cylinder head if I remember correctly.
The top cover sits on rubber grommets and you just pull hard, but you will need to undo the 8mm screw which holds the water hose clamp at the front and take off the oil filler cap and then you can swing it over as there are a couple of wires going to fuses on one side.

Thanks Spannerman, with give those pointers a look this evening.

 

[Burkstar]

Well got most of the fuel out and it looks clean although a very dark colour and very cloudy. Still replacing it with clean fresh fuel and new filters will do it more good than harm.
As for the turbo boost sensor I still cant find it, i cant even find them for sale online so I can see what im looking for.
Is it bolted to the charged air cooler ?

Please help.

Its Ok, I found the little blighter.

 

[adamf]

I've just sold my Aquafish 23, that I had for 6 years. I built it so I know them inside out, mine also had a D3 running an SX Leg.

I can tell you that running a single Ali prop you want 14.3x21" that will give you 3800 rpm and a top speed of about 32-36 knots depending on boat weight, tide etc.

As you may have found out the D3 are a sensitive little engine... Mine was bullet proof but often threw a fault code for no apparent reason. I just learn t to live with it once I knew the engine was sound.

Drop me a PM if you have any specific questions. I now have an Aquafish 28 running a D4 260.....