Thread: Wotcher Guv'nor

Originally Posted by Bush65

Illustration of type RLD governor as fitted to the A series injection pump used on Isuzu 4BD1 and 4BD1-T.

Black smoke is a result of fuel that has not been burnt completely - often because there was not enough air (could be other reasons such as poor fuel atomisation).

The air may be restricted somewhere in the intake/filtration system.

Turbocharges are great for diesel engines, which like high air/fuel ratios - low air/fuel (rich) results in black smoke and higher exhaust gas temperature.

The maximum fuel adjustment on the governor is easy to adjust for more fuel when a turbo is fitted. This is usually required to get more boost pressure (unless the turbo fitted is on the small side).

Several threads in this forum go into more detail on fitting a turbo. From memory the most recent was started by Isuzurover a few months ago.

Thanks

whats the difrence between the Idling set bolt and the idling spring assembly. IE what one should i ajust if i want a bit of a higher idle

the quick and easy way is to adjust one of the 2 bolts that act on the lever that the throttle cable hooks up to when at rest you will see one bolt is stopping the lever moving back towards the cable any further, just wind that in a turn or 2. the other one sets the maximum throttle position.

any one have the same picture but for the pump side?

Adjust the idling set bolt as Dave said.

The idling spring is adjust to obtain a specific rack position at a the specified pump speed when the control lever is held against the idling set bolt.

Exploded assy

OK looking under the bonett, following the fule lines, is the governor full of diesel as its lubricant?
and where do i ajust to cut down on my over fueling ?