Volvo 2020 Concern Part 2

[Bilgediver]

Hi,

Unfortunately this is second hand as I'm at work right now, but I am told that there wasn't any perceptable difference when each cylinder had it's fuel cut off.

I will go down to the boat this evening and see if I can learn anything more.

The knocking sound isn't a problem to me in itself but my concern is that using the engine is causing further damage and it will then fail at an inopportune & expensive moment.

This seems inconsistant with your original comments. Are all cylinders starting together now or does it still start on two then run on three later??? If so I would question that the drop in revs is the same no matter which injector has its fuel cut off by slacking back the nut. There is no risk of high pressure spray doing this as the pressure goes almost to zero however I do have kitchen roll available to catch the oil!

 

[Lucky Duck]

The consensus from the original thread seemed to be that the problems were caused by lack of compression in one of the cylinders which was then firing when it had warmed up a little. The fact that the knocking noise could be heard when the engine was working OK led me to belive this was a sign that the third cylinder was back on line.

Based on what I am told today it seems that there is something wrong across all three cylinders which is causing this lack or power/poor running unless it is given some 'beans'.