Does anyone have experience of using an Eberspacher system above 1400m? Apparently this kit (a pressure sensor and extra software to regulate diesel supply) needed to avoid heater problems.
Hi and thanks
Well I could certainly live with a 20% drop in efficiency as would only stay a week or so at a time at altitude ... just put more clothes on! It's more the possibility of damage to the heater or failure to operate at all that I was more concerned with, which seems to be the risk (without the upgrade) according to the van converter.
I guess the best thing to do is to email Erbespacher and ask them what "problems" running the system say at 2000m for a couple of weeks would cause - realistically in Europe, you are unlikely to be staying for any period of time above 2000m in summer and probably no higher than 1600m to 1850m in winter (if you go skiing in the Alps)
so as long as using it without the extra kit isn't going to damage the heater and won't somehow poison you and the only downside is slightly less efficient heating, then i'd be happy enough to use it without the modification.
if you are in S America e.g. (Cusco in Chile Alt 3400m) or some of the US ski resorts (e.g Mammoth alt 2400m) then it might be more of an issue but i guess you are not in the Andes or Sierra Nevada
I was interested so had a google. Seems at high altitude the air is thinner, so with same amount of fuel going in the burn is sootier, ok richer.
Apparently eberspacher can supply a second fuel pump for high altitude that supplies less fuel so burn is correct.
I think there is an electrical switch to choose which pump to use.
All above picked from various threads on other forums, suggest you speak to eberspacher for confirmation.
probably some thing thats restricts the fuelling similar to the cheap ecu chips in reverse ,we all refer to it as a pump when its realy a metering unit delivering the correct amount of fuel its this that makes the heater modulate along with fan speed