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 GEN1 6G72 Fuel Pressure
#1104900
03/07/19 10:03 PM
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Joined: Apr 2018
Posts: 108
OP
Wheeler
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Hi All,
I have a GEN1 that I'm trying to sort out after engine replacement. I have a question regarding checking fuel pressure. I have my fuel pressure gage installed on the fuel filter inlet banjo fitting.
With everything connected I get ~42-44psi on (2) different Fuel Pressure Regulators. FSM states this should be 38psi.
When I disconnect the vacuum line to the FPR I get 53psi, which is within specification of the FSM.
I'm confused about the 38psi from the FSM. Is this a MAX limit? Would only 4psi above that cause issues?
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Re: GEN1 6G72 Fuel Pressure
[Re: chadzeilenga]
#1104903
03/09/19 11:15 PM
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Joined: Feb 2005
Posts: 7,458
Trail Leader
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Is there another port along the fuel rails on the engine? Has been a long time since I looked.
1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya
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Re: GEN1 6G72 Fuel Pressure
[Re: chadzeilenga]
#1104906
03/10/19 02:34 AM
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Joined: Apr 2018
Posts: 108
OP
Wheeler
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Hi Rx,
Not that I can tell. Just the connections from flex line to rail and FPR. Looks like there is a special adapter in FSM to measure at the rail.
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Re: GEN1 6G72 Fuel Pressure
[Re: chadzeilenga]
#1104914
03/16/19 10:07 PM
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Joined: Feb 2001
Posts: 2,356
Body Damage is Cool
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I used to have the adapter hose. I can look next week. It replaces the high pressure line from the firewall to the engine. It has an inline T with a schrader valve to check the pressure. Someone could make one themselves by splicing in a T and a schrader valve.
Mitsu # 6 - 98 6G72 Montero Sport, Locking Rear Diff, Aisin Manual Hubs, 31x10.5
Mitsu # 7 - 02 6G74 Montero Limited
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