3.0 litre EGR/Butterfly/Swirl Mod
- Thread starter stubbsy351
- Start date
Help Support Nissan Navara Forum:
ok i had a look last night, under the bonnet and i think i have it,
do ya take the t piece out of the under side of the shutdown solinode and have one bit of hose from from it to the t piece at swirvl solinode and ya use that t piece to to add the egr line to the other line that goes to the shutdown solinode,
sorry if that seem's a bad discription but in other word's there will be nothing plugged into the egr solinode.
do ya take the t piece out of the under side of the shutdown solinode and have one bit of hose from from it to the t piece at swirvl solinode and ya use that t piece to to add the egr line to the other line that goes to the shutdown solinode,
sorry if that seem's a bad discription but in other word's there will be nothing plugged into the egr solinode.
exactly. nothing is connect to EGR solenoid and the EGR and shutoff actuators are T together and connected to the shutoff solenoid.
remind me to dig out some better photos of it all
remind me to dig out some better photos of it all
Just reasking Matt's question, is this an applicable/valuable mod for the 2.5 CRD model?
variable turbo certainly not. if its got normall turbo then proberly not tho i can't tell for sure.
mud4b
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Another case of writing a reply before i re read all the newer posts..
i think i have it (seems to run fine, i got 3 pics overhead of the 3 stages with the loom out of the way, if i post up can someone please confirm if i have it right?
cheers mark.
i think i have it (seems to run fine, i got 3 pics overhead of the 3 stages with the loom out of the way, if i post up can someone please confirm if i have it right?
cheers mark.
i blocked my EGR this weekend. haven't done the swirl valve thing as i'm not sure it is as important. How many of you have done this also? seems to be nowhere near as common. i'm gonna re-read some stuff posts of tweak`es here and do a little googling to see what i can find about the swirl.
i did a thread about the swirl valve on a couple of forums tho some of those may be gone due to forums crash.
i have the swirl control disabled, but thats only because EGR is blocked.
the swirl is a good thing when you have lots of EGR going into the motor, it helps mix the EGR and air.
swirl valve only works when motor is warmed up and is only when in gear and from idle up to about ~1500 rpm (i will have to check manual it may be 1700rpm). (ie it only works in the same conditions that the EGR works in)
what they don't tell you is swirl valve actually blocks off one half of the dual intake. this increases the amount of EGR drawn into the motor as the EGR is only on one intake.
hence no EGR therefore no need for the swirl.
with it blocked it does increase off the line performance slightly. however as fueling is limited by the ecu so you won't get a big increase. those with aftermarket chips may find a big increase.
i have the swirl control disabled, but thats only because EGR is blocked.
the swirl is a good thing when you have lots of EGR going into the motor, it helps mix the EGR and air.
swirl valve only works when motor is warmed up and is only when in gear and from idle up to about ~1500 rpm (i will have to check manual it may be 1700rpm). (ie it only works in the same conditions that the EGR works in)
what they don't tell you is swirl valve actually blocks off one half of the dual intake. this increases the amount of EGR drawn into the motor as the EGR is only on one intake.
hence no EGR therefore no need for the swirl.
with it blocked it does increase off the line performance slightly. however as fueling is limited by the ecu so you won't get a big increase. those with aftermarket chips may find a big increase.
i've got it unplugged. not sure if ECU sees it as a fault but will check manual latter and see if its something the ecu checks. otherwise just fit a ball bearing in the vac line 
thats something tweak`e came up with. I read a post he did somewhere on another site explaining why. I did it on mine as he seems to know his stuff with motors. i think i remember its not essential but it is worthwhile done.
tommy222220_0
Member
Yep, Specific to the navara ZD30
Hoses are the same as mine have been for the last 10months or so. but would run some tube in a U shape to protect the disconnected vacuum lines.
No problems yet. No increase in boost pressure.
I would personally recomend blocking it both at the exhaust manifold and the intake side. Stops the constant de/pressurising of the EGR system.
