G
Guest
Guest
Hi John,
As I said I suspect it is down to low revs - how far do they drop when you put
the car in gear.
It's called the load volume screw and is from memory positioned just above the
point at the back of the pump where the fuel is distributed to the injectors.
The screw has a 6mm hex head as well as a flat cut in it for a screwdriver and
is locked by a 12mm nut.
ISTR that you turn it clockwise to increase the fueling and anticlockwise to
reduce the fueling. Only adjust in 1/4 or 1/8 of a turn increments and make a
note of exactly what changes you make each time so that you can keep track of
it.
I suggest that you tweak it, then take it for a run up a local hill watching
carefully for smoke out the back and then tweak again until you strike the
balance of a little bit of smoke under hard acceleration or driving up hill,
but nothing noticeable when driving normally on the flat.
If you don't get the 90 degree exhaust pipe at the back it will be difficult to
spot without someone driving behind you monitoring it.
Another thing to note, you obviously need to do the smoke test when the engine
is warm and also you may well find that the tickover revs increase a bit as the
engine becomes properly fuelled.
A local injection company actually suggest intially adjusting the fuelling to
the point where the tickover has risen to it's highest point and then work from
there to adjust for smoke.
Generally whiteish smoke means under fuelling and black smoke indicates over
fuelling.
Also note, when you do the adjustment, hold the LV screw tightly in position
when you tighten up the locking nut, otherwise it will move.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
As I said I suspect it is down to low revs - how far do they drop when you put
the car in gear.
It's called the load volume screw and is from memory positioned just above the
point at the back of the pump where the fuel is distributed to the injectors.
The screw has a 6mm hex head as well as a flat cut in it for a screwdriver and
is locked by a 12mm nut.
ISTR that you turn it clockwise to increase the fueling and anticlockwise to
reduce the fueling. Only adjust in 1/4 or 1/8 of a turn increments and make a
note of exactly what changes you make each time so that you can keep track of
it.
I suggest that you tweak it, then take it for a run up a local hill watching
carefully for smoke out the back and then tweak again until you strike the
balance of a little bit of smoke under hard acceleration or driving up hill,
but nothing noticeable when driving normally on the flat.
If you don't get the 90 degree exhaust pipe at the back it will be difficult to
spot without someone driving behind you monitoring it.
Another thing to note, you obviously need to do the smoke test when the engine
is warm and also you may well find that the tickover revs increase a bit as the
engine becomes properly fuelled.
A local injection company actually suggest intially adjusting the fuelling to
the point where the tickover has risen to it's highest point and then work from
there to adjust for smoke.
Generally whiteish smoke means under fuelling and black smoke indicates over
fuelling.
Also note, when you do the adjustment, hold the LV screw tightly in position
when you tighten up the locking nut, otherwise it will move.
--
Regards,
Julian Voelcker
Mobile: 07971 540362
Skype: julianvoelcker
Cirencester, United Kingdom
1994 HDJ80, 2.5" OME Lift
