speedaholic wrote:das normal with the quality of diesel we get here in trinidad... but be awake of the gas stations that u fill up at... the common rail fuel injection system in your navara is very sensitive to bad fuel... and cud run into costly repairs.. to try your best to fill up at reputable gas stations.. eg. unipets etc... but i dont think that puff of smoke shud be a problem... the other navara owners on the forum will confirm... congrats on ur new purchase...
Yeah I was getting black smoke out of my Navara as well, even though it's relatively new - I now reach 10,0015KM this morning
.
My smoking occured mostly under hard acceleration, but it also occasionally occurs when pulling off - esp. after a long idle. This is because of buildup of exhaust within the exhaust pipes, it gets blown out the tailpipe as you pull off and rev into 1st and 2nd. By 3rd gear it's usually gone, and then all the way from 4th to 6th gear there's no smoke at all.
I've done extensive research on it - looked up
www.nissan-navara.net and
www.navara.asia and read all the forum posts on smoking - and I narrowed it down to our crappy diesel fuel quality.
- It's not the injectors, because the truck is still new and even so, if the injectors were dirty there'd be power loss.
- It's not the air filter, because I put in a K&N and the same thing was happening, and I put back in the stock filter and no change in behaviour
- I think my driving habits did contribute a little to the smoking. I was driving the Navara hard for the first couple of weeks, and I believe the aggressive driving occurred during the "learning phase" of the van's ECU - so it learnt that I have a heavy foot and thus should always give me a rich mixture of fuel for more power. However that would have lead to more smoking since there are less hydrocarbons being burnt on normal/moderate driving.
I was able to reduce the smoking a bit by
resetting the ECU and then driving easy for a bit to teach the ECU to give me a more leaner fuel supply.
Reset your ECU after you do an oil-change or major service, or after you change your Air Filter/Drop in a K&N.
- with the van engine WARM, switch off (if you have a turbo timer, let it count down and switch off the van)
- then turn the ignition to "ON" so all the dash lights come on
- wait 3 seconds
- pump accelerator 5 time, do this within 5 seconds
- take foot off accelerator, count to 7 seconds
- then press and hold the Accelerator all the way down for 10 seconds
the yellow "check engine" light will start to flash - this means your truck is now in
Diagnostic Mode and will give you specific codes for any errors in the system.
10 slow flashes, then 30 fast flashes means there's no errors.
Now hold the accelerator down for 15-20 seconds.
This will put the ECU into "Learning Mode" - it will now be learning your driving habits as you start, then drive, then shut off later on.
The yellow light will continue to flash anyway, so take off your foot from the accelerator and start up.
Then go for a nice, easy drive, go through all the gears 1-5 or 1-6 if you're manual, and then find a place to stop and switch off.
Then start back up - and drive normal. Your ECU now learnt to give you a nice, lean mixture of fuel and you should see less smoking, and prob a better overall fuel economy.
***NOTE***
Neal and Massy does not do this ECU reset for you after changing your oil when you service by them - so be sure to do the ECU reset after each oil change when you get home.