Turbo boost issue fixed.

[Elessar]

The port engine was reading a constant boost of 60psi - at the ECU not a dash gauge which uses a different sensor.

This means the ECU was overfueling on acceleration causing a puff of black smoke. And additional fuel use. It was all quite subtle and the engines were running well. I fitted a device to display ECU data on my chart plotter which alerted me to it.

Swapping parts showed the ECU was at fault.

Egged on by various boaty mates, notably @vas and @petem i took the lid off the ECU with the aim of swapping the boost sensors.

I found this.



And it didn’t take a lot of hacking to get the boost sensor out.



I found water in the pipes of both engines. There is a T under the ECU with a blank one end. Use this to drain the water.

There was crud in the sensor. This is the good one.



I cleaned it out with contact cleaner.

Same port side and the idea was to swap them to isolate the fault.

However cleaning it out cured the problem.

A free fix for a rainy day. And I’ll remember to drain the T periodically in future.

Before.



After

 

[vas]

...and overtime fuel consumption on port engine came down to sbrd engine as well

nice easy zero cost fixes is what I like most on boats!

 

[Sticky Fingers]

Made a very entertaining watch from the sidelines!

 

[volvopaul]

The old mild steel sensor done reality well, was the new one brass body ?

 

[Elessar]

The old mild steel sensor done reality well, was the new one brass body ?

I didn’t replace it Paul. Just cleaned the old one. Both original.

 

[andy59]

Nice easy fix, thanks for sharing. What kit do you use to get the engine data on screen ?

 

[jon and michie]

What model Engine was this on and how old ?
Maybe good to do a routine check just as a precaution

 

[Elessar]

What model Engine was this on and how old ?
Maybe good to do a routine check just as a precaution

TAMD74 EDC later 480hp version. Year 2000.
I would routinely drain the pipe, yes.