Hi,
I previously posted about issues I am trying to figure out on my V40 here:
https://www.volvoforums.org.uk/showthread.php?t=290336
I have noticed some oil around where this pipe connects and wondered what the pipe is for as it may help me diagnose the problems:
(not an actual pic of my engine by the way)
Also, I pulled these error codes from the ECU:
0139,0131,0172,0107
Any suggestions, even vague guesses may be helpful! My mechanic wants to replace the oxygen sensors and cat but I think there is a deeper rooted issue that needs to be sorted first. Thank you in advance
Previous post text for reference:
Quote:
My V40 2.0T with aftermarket LPG conversion is putting out a significant amount of smoke at quite specific moments. I have my mechanic looking into it but thought it would be worth sticking on here in case the combination of symptoms brings up an obvious problem to someone!
If I do 70 on the motorway and slow down to around 60, a thick cloud comes out briefly and lingers slightly where it comes out as opposed to spreading with the speed of the vehicle. It also seems to do it more at lower speeds but mostly when I lift off the accelerator. It's almost like something is building up under acceleration and then burning off when I take the pressure off.
When I stop and leave the car idling, the smoke comes out consistently thick. It seems worse with petrol than LPG but I may be wrong with that. There are multiple error codes that mention lambda sensors and fuelling mainly. I reckon the smoke has a slight blue tint when I see it on the motorway but it looks more white at idle.
The LPG system is also struggling to kick in over the past week despite being full of gas. The car has always had a problem with hesitation under initial acceleration now and again but that's mainly on LPG. One more thing: the fuel pump was replaced recently.
Based on the error codes and the fact it's been running on LPG, I'm tempted to think it is over-fuelling. However, I am aware white smoke is generally water and blue is oil.
Thank you.
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