Emissions

T

TR3a

Active Member

Posts

151

Location

Lincolnshire

• Jun 4, 2024

• #1

Just had my 19J fail its MOT on emissions. Should be maximum 3 and is currently 4.3.
It has a new diesel and air filter. The mot guy says to find out how to adjust the fuel and bring it back and he will alter it.
I also had the injectors cleaned and set up.

So, where is the fuel adjustment screw?

Thx.

 

300bhp/ton

Well-Known Member

Posts

5,036

Location

Near MK

• Jun 4, 2024

• #2

Does it smoke much? What colour? Might be easier to find a different MoT station more used to diesel Land Rovers.

 

T

TR3a

Active Member

Posts

151

Location

Lincolnshire

• Jun 4, 2024

• #3

No doesn’t smoke.

 

H

hughdavies

Well-Known Member

Posts

1,496

Location

Western Brecon Beacons mynudd du.

• Jun 4, 2024

• #4

Helps to give it a good blast down the road at 3000 rpm to blow all the crud out of it before you enter the MOT.

 

T

TR3a

Active Member

Posts

151

Location

Lincolnshire

• Jun 4, 2024

• #5

Done the thrash down the road for 30 mins to no avail. Is it possible to adjust the fueling and if so where is the adjustment.

 

H

Hicap phill

Well-Known Member

Posts

16,363

Location

Wiltshire

• Jun 4, 2024

• #6

TR3a said:

Done the thrash down the road for 30 mins to no avail. Is it possible to adjust the fueling and if so where is the adjustment.

Click to expand...

Wind the stop out so he can’t rev it

 

S

shaynecm

Active Member

Posts

145

• Jun 4, 2024

• #7

undo the fuel metering screw on rear of
pump and go out 1/4 turn at a time until smoke dissappears .
youll have to strike balance between power and smoke and so it may take
a few attempts to get satisfactory .

this screw is on rear of pump near the injector pipe unions , it has a
13mm locknut and a screwthread extending out about 25mm , there is
screwdriver slot in end of thread , you hold locknut loose with spanner
and then unscrew or screw the thread in or out as desired .
IN for more fuel, OUT for less .

 

T

TR3a

Active Member

Posts

151

Location

Lincolnshire

• Jun 6, 2024

• #8

Thx for all of this.

I took the injectors out and two were ok, one leaked and was popping at 1500 instead of 2000 and the other was leaking at 1200.
I stripped them down and re seated the needles with some Brasso, adjusted the pop offs to 2000 and the MOT man records no smoke in his test this morning.
It also idles and runs much better.
For a 19J I am impressed with performance and starting. It’s in a 110.

One of the best things that I bought was the pop off tester….

Thx again for all of the suggestions.