Ian H
New Member
- Joined
- Aug 29, 2018
- Messages
- 9
- Country Flag
Hi guys, im currently driving around the USA in my HZJ79.
over the last few months we have had a recurring problem at altitudes over about 2500 metres.
the standard 1HZ motor (non turbo) runs perfect at lower altitude but over about 2500m she coughs and has low power, its like one cylinder is miss firing.
the last couple of times this is accompanied by puffs of blue grey smoke and a top end rattle from the rocker cover area. if I add a double dose of diesel treatment with cetane booster she picks up a bit but not a cure. as soon as I drop below 2000m she's back to being smooth and quiet.
Im struggling to find a solution having visited 2 mechanics who seam at a loss as well.
my thoughts are:- given the reduced oxygen at altitude I am getting an incomplete combustion in at least one cylinder causing the power loss and miss fire symptom, adding the cetane boost then increases the combustibility of the diesel and partly cures the problem.
this is all my limited knowledge can come up with.
I would really appreciate some of your shared knowledge as I'm heading to South America in a few months where I will be above 3000m for months at a time.
many thanks in advance.
ps im on the road so may not be able to answer any replies for a few days.
over the last few months we have had a recurring problem at altitudes over about 2500 metres.
the standard 1HZ motor (non turbo) runs perfect at lower altitude but over about 2500m she coughs and has low power, its like one cylinder is miss firing.
the last couple of times this is accompanied by puffs of blue grey smoke and a top end rattle from the rocker cover area. if I add a double dose of diesel treatment with cetane booster she picks up a bit but not a cure. as soon as I drop below 2000m she's back to being smooth and quiet.
Im struggling to find a solution having visited 2 mechanics who seam at a loss as well.
my thoughts are:- given the reduced oxygen at altitude I am getting an incomplete combustion in at least one cylinder causing the power loss and miss fire symptom, adding the cetane boost then increases the combustibility of the diesel and partly cures the problem.
this is all my limited knowledge can come up with.
I would really appreciate some of your shared knowledge as I'm heading to South America in a few months where I will be above 3000m for months at a time.
many thanks in advance.
ps im on the road so may not be able to answer any replies for a few days.