M-923 start's uphill longer

Micmada

Member
38
16
8
Location
Florida
When the truck is parked on a slight uphill incline, it seems to take a bit longer to start and it will do a small rev up and down and back to normal. Parked on a horizontal lot, it starts just fine. I suspect maybe I need to change the fuel filter at least? Maybe something else is up?
 

Micmada

Member
38
16
8
Location
Florida
You have an air leak in the fuel line some place, or the o-rings in the primer pump are bad, or a leak around around the fuel filter.
Ok, so I do have a leak by the Pt pump “back plate” next to the intake. It seems to be a seal or a pressure damper needing replacement perhaps. In the first few seconds of this video they show the pressure damper and I believe it is the plate holding the pressure side of my pump which is leaking. It would explain the eratic start because the damper is there to prevent pressure spikes and lows, which is what my truck goes through when it starts, racing first and then choking and then idling ok.

 
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