bringthenav
Member
My Nav D40 Manual 2.5L Diesel Navara i bought under a year ago has 300,000 on the clock, still goes alright around town.
Lot better when i bought it but not for long, slowly getting worse
It had this issue when i bought it i think, but not bad at all, i didn't notice or know about smoke, it didn't lose much power on freeway hills under load, then it slowly got worse over 8 months ove owned it, if it gets much worse i could be off the road.
Keen to get to bottom of it !!
It will display following symptoms:
After going up hills at say 50-60kmh typical local speeds then coming to a standstill... the engine appears to shudder for 10 or 15 seconds (the gear stick can be seen shaking about),
starved of fuel under load? or not burning diesel right from something unknown.. not sure?
Itll blow some smoke under heavy pedal pressure under load.
Then when moving off after the hill after its stopped shuddering about (or before that) it blows a huge cloud of dark black smoke on take off.
When cold and not warmed up much yet, it will shudder worse if coming to a stop after a hill, and then not take off well and blow smokeif stuck at lights etc while moving off still on a hill or under some load.
When planting the foot a fair bit to get up to decent speeds to negate town driving conditions itll blow a fair bit of gray or some amount of black smoke under load or fairly hard pedal pressing on accel until being light on pedal after gear changing and at cruising speed.
On the freeway if going up a hill at 110 itll lose alot of power after less than a minute, a blow copious amounts of smoke, mostly gray bit black maybe, and lose alot of power, even gearing down i wont be able to go faster than about 90, with smoke pouring out... And then on the flat again i can reach 110-120.
I noticed in testing on the flat it doesnt even want to drive much faster than 120 despite obviously not needing to, it would be blowing smoke and losing power if i try accel up to 120+
When i got it the first couple drives on freeway im pretty sure it had alot more power up hill and wasnt really doing this, but i noticed it was a bit gutless.
I have done about 3-4 fuel treatments, changed the fuel filter, changed the oil (bit overdue again i reckon its been about 7000-8000+ bit busy cash strapped etc, will do shortly.. i meant to do it by 5-6000)
Ive heard of this problem a bit before recently joining the forum while i was treating the fuel and doing the filter i looked it up a bit on line.
Hasnt been scanned for codes yet, but i have had Cel thrown a few times then go away and i have hit limp mode on hard accel a few times in recent months.. with or without a code on the dash..and had to pull over. I noticed if i turned off the engine & restarted it limp mode was gone and i can drive normally again.
What are some things it could it be?
Bad fuel pump? * I Suspect it
Blocked cat or dpf? *I suspect it
Suction control valve? *I suspect it
Electrical issue ? *Could be
Injector/s? *Maybe possible
Some good advice & your stories people of similar experiences and what it was/how u solved it would help alot. Thanks
Lot better when i bought it but not for long, slowly getting worse
It had this issue when i bought it i think, but not bad at all, i didn't notice or know about smoke, it didn't lose much power on freeway hills under load, then it slowly got worse over 8 months ove owned it, if it gets much worse i could be off the road.
Keen to get to bottom of it !!
It will display following symptoms:
After going up hills at say 50-60kmh typical local speeds then coming to a standstill... the engine appears to shudder for 10 or 15 seconds (the gear stick can be seen shaking about),
starved of fuel under load? or not burning diesel right from something unknown.. not sure?
Itll blow some smoke under heavy pedal pressure under load.
Then when moving off after the hill after its stopped shuddering about (or before that) it blows a huge cloud of dark black smoke on take off.
When cold and not warmed up much yet, it will shudder worse if coming to a stop after a hill, and then not take off well and blow smokeif stuck at lights etc while moving off still on a hill or under some load.
When planting the foot a fair bit to get up to decent speeds to negate town driving conditions itll blow a fair bit of gray or some amount of black smoke under load or fairly hard pedal pressing on accel until being light on pedal after gear changing and at cruising speed.
On the freeway if going up a hill at 110 itll lose alot of power after less than a minute, a blow copious amounts of smoke, mostly gray bit black maybe, and lose alot of power, even gearing down i wont be able to go faster than about 90, with smoke pouring out... And then on the flat again i can reach 110-120.
I noticed in testing on the flat it doesnt even want to drive much faster than 120 despite obviously not needing to, it would be blowing smoke and losing power if i try accel up to 120+
When i got it the first couple drives on freeway im pretty sure it had alot more power up hill and wasnt really doing this, but i noticed it was a bit gutless.
I have done about 3-4 fuel treatments, changed the fuel filter, changed the oil (bit overdue again i reckon its been about 7000-8000+ bit busy cash strapped etc, will do shortly.. i meant to do it by 5-6000)
Ive heard of this problem a bit before recently joining the forum while i was treating the fuel and doing the filter i looked it up a bit on line.
Hasnt been scanned for codes yet, but i have had Cel thrown a few times then go away and i have hit limp mode on hard accel a few times in recent months.. with or without a code on the dash..and had to pull over. I noticed if i turned off the engine & restarted it limp mode was gone and i can drive normally again.
What are some things it could it be?
Bad fuel pump? * I Suspect it
Blocked cat or dpf? *I suspect it
Suction control valve? *I suspect it
Electrical issue ? *Could be
Injector/s? *Maybe possible
Some good advice & your stories people of similar experiences and what it was/how u solved it would help alot. Thanks
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