Power loss uphill
Baja
Joined: Aug 2013
Posts: 5,845
Likes: 368
From: Near Bordeaux, France
The performance of diesel engines fail for a plethora of reasons, without codes it's hard to judge. Some fail due to MAF failures and default to ECU fuelling maps due to a lack of air, some are due to the use of bio fuel oil, some are just old and knackered or lack of fundamental maintenance but without codes and seeing/hearing the truck in question everything is a mere guess. I own and run an efficient TD5 turbo diesel but it's keeping it running efficiently that tests ones mettle. There are many 'specialists' out there but knowing who is b-llsh!tting is the difficult job, tuned diesels sacrifice certain aspects, drivability, longevity, etc, etc. there is no easy answer, similarly with petrol engines.
TReK
Joined: Feb 2009
Posts: 2,186
Likes: 200
From: Linden, NJ
Had that happen with the P38 too... Turned out it was the fiberglass guts of the resonator clogging the exhaust pipe. Really only noticeable going uphill, but one day picked a really big hill and it just bogged down all the way until had to pull over, found the strands of glass coming out the exhaust pipe, pulled about 25 feet of it out and all was good.
On another note, with the Disco, recently went up a mountain, from around 100' to 5000 ft in less than an hour... Never heard so much pinging in my life!!! Whenever it tried to downshift to 3rd at around 50mph it would start the pinging. no pinging if I just lugged along in 4th at 50mph.
My question, is this normal? It is as though the computer could not adjust the mixture fast enough for the thinner higher elevation air. No codes, no pending codes, etc. I would think I'd get a lean condition code at least, but nothing. Then spent a day at 3500' and went back over the mountain, much less pinging. Now back to sea level and it runs completely smooth again.
Any of you who go from sea level to the mountains rapidly experience anything like this and have an answer or solution?
On another note, with the Disco, recently went up a mountain, from around 100' to 5000 ft in less than an hour... Never heard so much pinging in my life!!! Whenever it tried to downshift to 3rd at around 50mph it would start the pinging. no pinging if I just lugged along in 4th at 50mph.
My question, is this normal? It is as though the computer could not adjust the mixture fast enough for the thinner higher elevation air. No codes, no pending codes, etc. I would think I'd get a lean condition code at least, but nothing. Then spent a day at 3500' and went back over the mountain, much less pinging. Now back to sea level and it runs completely smooth again.
Any of you who go from sea level to the mountains rapidly experience anything like this and have an answer or solution?
TReK
Joined: Nov 2011
Posts: 2,748
Likes: 506
From: Seattle, Wa
"at higher altitude you get lesser oxygen so there will be loss of horsepower."
I realize this, at some point however the ECU senses and adjust to the elevation/oxygen level right?
Unfortunately the mini vans passing me on the pass did not have the same loss of horsepower.
I don't recall it being so dramatic in the past but have noticed it before.
So does anyone have similar experience and is there a method to actually have horsepower climbing a hill in a V8 Petrol Disco?
I realize this, at some point however the ECU senses and adjust to the elevation/oxygen level right?
Unfortunately the mini vans passing me on the pass did not have the same loss of horsepower.
I don't recall it being so dramatic in the past but have noticed it before.
So does anyone have similar experience and is there a method to actually have horsepower climbing a hill in a V8 Petrol Disco?
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mirko_gardilcic
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Nov 3, 2009 10:49 AM
