Changing Fue Pressure Regulator on 1991 Sovereign Tomorrow
#1
Changing Fue Pressure Regulator on 1991 Sovereign Tomorrow
91 Sovereign 4.0, hard cranks when engine is warm and making frequent stops and restarts... especially in hot weather (vape locking of sorts). Ordered a new regulator and it arrived today, installing Saturday morning.
Any tips, advice, warnings in swapping out to a new regulator? I know also installing a one-way not return valve is also recommended, I'm just gun shy on that (cutting/ splicing fuel line) and not clear on the right own to buy.
But anyway, I just want to focus on the FPR for now. Any tips are appreciated...
Any tips, advice, warnings in swapping out to a new regulator? I know also installing a one-way not return valve is also recommended, I'm just gun shy on that (cutting/ splicing fuel line) and not clear on the right own to buy.
But anyway, I just want to focus on the FPR for now. Any tips are appreciated...
#2
Tip: unplug the fuel pump relay with the engine running. That will allow the engine to conk out after a bit and also de-pressurize the fuel rail/regulator so you don't squirt fuel everywhere when you undo the regulator.
Other than de-pressurizing the line, replacement is pretty straightforward. Still a good idea to put a rag under the unit when you remove it as you will get a slight spillage of fuel when the union is undone.
Larry
Other than de-pressurizing the line, replacement is pretty straightforward. Still a good idea to put a rag under the unit when you remove it as you will get a slight spillage of fuel when the union is undone.
Larry
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Don B (09-29-2018)
#3
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#6
Yeah,
IDK,... story of my DIY life. Things that come easier to you "quite mechanically inclined" types don't sometimes work with me....
Anyway, I can't find fuel rails that will come without the injectors, seals etc (checked Ebay, various Jag parts companies). My injectors are fine, I don't want to foot the bill for the entire assembly. So any resources on a rail ONLY would be appreciated...
IDK,... story of my DIY life. Things that come easier to you "quite mechanically inclined" types don't sometimes work with me....
Anyway, I can't find fuel rails that will come without the injectors, seals etc (checked Ebay, various Jag parts companies). My injectors are fine, I don't want to foot the bill for the entire assembly. So any resources on a rail ONLY would be appreciated...
#7
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Hi jagbro,
All of us have had something break that ruined our day, or week. Just in case it helps others to avoid this problem in the future, the fuel rail connections at the FPR and fuel inlet line must be disconnected and reconnected using two wrenches of correct sizes. Using only one wrench can allow the pipe on the other side of the junction to twist and break. Also, when reconnecting these fittings, the nuts must not be over-tightened - they just need to be snug. I hope Jerry is able to help you with a replacement rail.
Cheers,
Don
All of us have had something break that ruined our day, or week. Just in case it helps others to avoid this problem in the future, the fuel rail connections at the FPR and fuel inlet line must be disconnected and reconnected using two wrenches of correct sizes. Using only one wrench can allow the pipe on the other side of the junction to twist and break. Also, when reconnecting these fittings, the nuts must not be over-tightened - they just need to be snug. I hope Jerry is able to help you with a replacement rail.
Cheers,
Don
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