Proper way to take hills (downhill) in manual... coast or engine brake? I'm confused.

[curtis73]

Guys... Easy. You're all pretty.

Most diesels (mechanical or electronic) don't fuel under decelleration. Even on (for instance) an old cummins, the fueling is still controlled by an electronic solenoid that shuts fuel down when you turn the switch off. This solenoid (on almost all diesels) shuts off to stop fueling under decelleration, then kicks back on if you get down near idle to maintain fueling. Electronically controlled injection pumps (like on a Powerstroke) still have a traditional injection pump, but they are electronically controlled and shut fuel off during decel. Later common rail injection shuts off injector cycles.

Pump lubrication during deceleration isn't an issue. Some pumps are gear driven, but when under decel, they aren't making much pressure. The amount of diesel in the pump is more than enough to cool and lubricate. Some pumps (like the Powerstroke) use engine oil to provide fuel pressure. Belt driven pumps have bypasses.

But that is all beside the point. The OP asked about proper ways to use a manual downhill.

[72chevelleOhio]

Originally Posted by curtis73

This solenoid (on almost all diesels) shuts off to stop fueling under decelleration, then kicks back on if you get down near idle to maintain fueling.

Thats my point!

kiwi - a wire screen may be in the inlet side of a pump, not my idea of a good filter. It should be filtered before going to the pump. I never tried to sell anything much less a "snake oil" on here......now I am done hijacking this thread.
my apologies to the thread starter.

[KiwiBacon]

Originally Posted by 72chevelleOhio

kiwi - a wire screen may be in the inlet side of a pump, not my idea of a good filter. It should be filtered before going to the pump.

My last reply to this thread:
My bosch type A pump has a full spin-on cartridge fuel filter plumbed in between the lift pump and the injection pump. Exactly where the factory put it 22 years ago.

[2.2 Straight six]

calm down ladies. slight misurderstanding, that's all.

[curtis73]

Originally Posted by 2.2 Straight six

calm down ladies. slight misurderstanding, that's all.

You just winked and kissed me. Eww