Lost vacuum
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Vacuum reserve canister: JEGS Vacuum Reserve Canister - JEGS for your brake issue.
As far as the low fuel pressure at times problem...probably running out of fuel supply. Perhaps a booster pump with a Hobbs switch that kicks in when the boost reaches XX psi would fit the bill?
As far as the low fuel pressure at times problem...probably running out of fuel supply. Perhaps a booster pump with a Hobbs switch that kicks in when the boost reaches XX psi would fit the bill?
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Posting Guru
Joined: Sep 2008
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Vacuum reserve canister: JEGS Vacuum Reserve Canister - JEGS for your brake issue.
As far as the low fuel pressure at times problem...probably running out of fuel supply. Perhaps a booster pump with a Hobbs switch that kicks in when the boost reaches XX psi would fit the bill?
As far as the low fuel pressure at times problem...probably running out of fuel supply. Perhaps a booster pump with a Hobbs switch that kicks in when the boost reaches XX psi would fit the bill?
I had a Hobbs sw but now have a 255 lph fuel pump, should be enough.
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Going to take it to a guy in town with a great dyno. I'll tell him about this.
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From: Calhoun GA
Dyno tuning is good as long as the person doing it is able to use the software. I personally don't recommend mail order tunes, especially for power adder applications.
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Brett Foote
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From: Hartland, WI
If anything, having no vacuum to the FPR will cause a rich condition at idle or low throttle, but it won't be the end of the world. Do you have AFPR installed and set to what works best for your tune and injectors? Pulse width is the main controlling factor in how much fuel gets into the engine anyways.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
This is exactly my point...less vacuum should increase the fuel pressure. If the volume required is exceeding the fuel pump supply the effective pressure will go down.
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Posting Guru
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If anything, having no vacuum to the FPR will cause a rich condition at idle or low throttle, but it won't be the end of the world. Do you have AFPR installed and set to what works best for your tune and injectors? Pulse width is the main controlling factor in how much fuel gets into the engine anyways.
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Posting Guru
Joined: Sep 2008
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If anything, having no vacuum to the FPR will cause a rich condition at idle or low throttle, but it won't be the end of the world. Do you have AFPR installed and set to what works best for your tune and injectors? Pulse width is the main controlling factor in how much fuel gets into the engine anyways.
i ain't rite
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From: Marlboro Mental Hospital.
Ford Diesel HVAC 4WD Electric Vacuum Pump New | eBay