| [GMCnet] Carter pump pressure [message #302163] |
Thu, 16 June 2016 06:11  |
Advanced Concept Ener
Messages: 112
Registered: December 2014
Karma: 0
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Senior Member |
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Yes it is a Carter 4070. I will check polarity again. It is a noisy thing. The fuel line is fed from the selector valve. One side of the selector valve goes direct to the primary tank the other side goes through one of those little Chinese electronic pumps to the secondary tank. The pump is wired to the selector valve so when secondary tank is selected the pump runs. The output of the selector valve goes through about 4' of 3/8 tubing to large canister Summit filter and then immediately to Carter pump. It is then pumped to front of motor home to FiTech fuel cell which has a tank and float valve and a submerged high pressure pump that pumps fuel at 55 psig through a secondary filter to the throttle body. The tank has a vent,( vented back to the gas tanks) and high and low pressure gauges.
I put the pump and filter in first and ran 200 miles with mechanical pump and carb still installed before I installed FiTech system.
Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash, FiTech FI
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| Re: [GMCnet] Carter pump pressure [message #302167 is a reply to message #302163] |
Thu, 16 June 2016 07:02  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Jon,
Now I understand -- you're using the FiTech "accumulator/high pressure
pump" ("Command Center"?), thus the low input pressure requirement.
Re-reading your symptoms, they sound to me exactly like those for either an
empty Aux tank or a failed selector valve admitting air to the input of the
aux pump.
In any case, seems to me the first diagnostic you'd use is to run the
engine in the suspicious conditions until there was no question that the
"Command Center" would have gone dry.
Ken H.
On Thu, Jun 16, 2016 at 7:11 AM, Advanced Concept Energy Solutions <
aces4nrg@gmail.com> wrote:
> Yes it is a Carter 4070. I will check polarity again. It is a noisy thing.
> The fuel line is fed from the selector valve. One side of the selector
> valve goes direct to the primary tank the other side goes through one of
> those little Chinese electronic pumps to the secondary tank. The pump is
> wired to the selector valve so when secondary tank is selected the pump
> runs. The output of the selector valve goes through about 4' of 3/8 tubing
> to large canister Summit filter and then immediately to Carter pump. It is
> then pumped to front of motor home to FiTech fuel cell which has a tank and
> float valve and a submerged high pressure pump that pumps fuel at 55 psig
> through a secondary filter to the throttle body. The tank has a vent,(
> vented back to the gas tanks) and high and low pressure gauges.
> I put the pump and filter in first and ran 200 miles with mechanical pump
> and carb still installed before I installed FiTech system.
>
> Jon Darcy ACES
> North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,
> FiTech FI
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Carter pump pressure [message #302169 is a reply to message #302163] |
Thu, 16 June 2016 07:42 |
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SeanKidd
Messages: 747
Registered: June 2012
Location: Northern Neck Virginia
Karma: 4
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Senior Member |
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John, are you using dual pumps and no selector? If so you need a check valve on each pump as there is no integral check on the p4070...jwid
Sean and Stephanie
73 Ex-CanyonLands 26' #317 "Oliver"
Hubler 1-Ton, Quad-Bags, Rear Disc, Reaction Arms, P.Huber TBs, 3.70:1 LSD Honda 6500 inverter gen.
Colonial Travelers
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