Hi all, I have an 08 D22 Nissan Navara (in Australia) with the YD25 Common Rail Diesel motor.
It has about 130k on the clock and showing a few symptoms that indicate I may have injector issues, however I realise it is often quite hard to pinpoint what issue is causing what.
I haven't had the vehicle that long but just to run through where I am at;
It is very rattley between about 1700 to 2400rpm when cold - once it gets up to temp it is fine.
Looking on forums this is not uncommon for the yd25 - so alone can't say this is all injectors and there are several possible causes for engine knock.
First tank of fuel averaged 12.5L/100km - Cleaned the Maf Sensor this has now dropped to a much more respectable 9.6L
At this point I thought things were looking better, so installed a TunitChip - This made injector (?) noise on hwy speeds quite noticable so I disconnected straight away.
So I was back to thinking maybe I do need to replace injectors so ran it up on dynotune which showed it had a big rich spot in low RPMs around 1400 and was down on power by probably around 15kw on manufacturer specs - Tuners diagnosis was injectors were pooring fuel in just on throttle causing it to run dangerously rich and also injectors would be causing the drop in power. Agree but again not definitive. They didn't offer much advice as to tuning the rich spot out or if it could be other causes e.g. crank angle sensor out of whack or something but said it is really not good for the motor - get it sorted straight away (I am sure they would of liked to pick up the job of doing the injectors there and then, but that wasn't going to happen)
Starts fine, runs fine, does blow a little black smoke when changing to second gear every now and then, there is a little bit of oil weeping around the intercooler but other than that seems to be going quite OK.
Injectors here are quite expensive, but so are engine repairs if it all goes bang... So I would prefer to do the preventative maintainece than suffer the long term consequences, but I also don't want to replace injectors and then find out the issue is elsewhere. so thought I would stick something up and get some feedback from the knowledge base here before I discuss with my regular mechanic and start pulling this thing down.
Last question are the injectors in the 2008 D22 and D40s the same I know the D40 is running a few different parts and settings which bump it up in power output significantly to the D22 but with the chip mod on the D22 is it worth considering going a different injector for the increase this makes?
It has about 130k on the clock and showing a few symptoms that indicate I may have injector issues, however I realise it is often quite hard to pinpoint what issue is causing what.
I haven't had the vehicle that long but just to run through where I am at;
It is very rattley between about 1700 to 2400rpm when cold - once it gets up to temp it is fine.
Looking on forums this is not uncommon for the yd25 - so alone can't say this is all injectors and there are several possible causes for engine knock.
First tank of fuel averaged 12.5L/100km - Cleaned the Maf Sensor this has now dropped to a much more respectable 9.6L
At this point I thought things were looking better, so installed a TunitChip - This made injector (?) noise on hwy speeds quite noticable so I disconnected straight away.
So I was back to thinking maybe I do need to replace injectors so ran it up on dynotune which showed it had a big rich spot in low RPMs around 1400 and was down on power by probably around 15kw on manufacturer specs - Tuners diagnosis was injectors were pooring fuel in just on throttle causing it to run dangerously rich and also injectors would be causing the drop in power. Agree but again not definitive. They didn't offer much advice as to tuning the rich spot out or if it could be other causes e.g. crank angle sensor out of whack or something but said it is really not good for the motor - get it sorted straight away (I am sure they would of liked to pick up the job of doing the injectors there and then, but that wasn't going to happen)
Starts fine, runs fine, does blow a little black smoke when changing to second gear every now and then, there is a little bit of oil weeping around the intercooler but other than that seems to be going quite OK.
Injectors here are quite expensive, but so are engine repairs if it all goes bang... So I would prefer to do the preventative maintainece than suffer the long term consequences, but I also don't want to replace injectors and then find out the issue is elsewhere. so thought I would stick something up and get some feedback from the knowledge base here before I discuss with my regular mechanic and start pulling this thing down.
Last question are the injectors in the 2008 D22 and D40s the same I know the D40 is running a few different parts and settings which bump it up in power output significantly to the D22 but with the chip mod on the D22 is it worth considering going a different injector for the increase this makes?
