It depends on the year. OLder ones did, newer ones don't. Cut off is around 1996
40 Psi
The regulator is part of the pump module in the fuel tank.
40 psi
I think that the problem is fuel flow oriented. At startup, 0-40, there is a large fuel flow required....as there is at 60 or above. At 40-50 not so much is required, nor at idle. The possibilities are clogged fuel filter or fuel line, water in gas tank, weak fuel pump (low pressure). Outside possiblity...clogged air filter.
40 psi plus or minus 540 psi plus or minus 5
Not sure you understand so I will explain. The fuel pump delivers fuel from its in the tank location to the fuel rail and a pressure regulator makes sure the pressure is 30 to 40 psi at the injectors. The pump provides more fuel than the engine needs so this regulator sends fuel back to the pump assembly in the tank. This return line had its own pressure control which is less than the 30-40 that the engine sees. The tank has a low pressure (vapor pressure) line that sends fumes to the charcol canister near the front fender. The vapors in this canister are sucked into the intake to prevent air polution.
40 psi plus or minus 5
is it in line with the fuel line? you can cut the ends and sometimes the new ones are large enough to fill the slight gap......replace fuel line.......theres always wd-40, liquid wrench
put a fuel line cleaner in it like start your engines...or put WD-40 in it
30-40 depending on what the computer has your gpm's at if the light comes on save yourself the embarrassment and start looking.
go into your fuse box under the hood and swap out the relay for the fuel pump and one that is similar, if this works you need a new relay for your fuel pump, if it doesn't get a fuel pressure gauge and check your fuel pressure on the rail. hook the gauge upto the schder(sp) valve on the rail and turn the key to on the position(do not start the jeep) if you don't have 40 psi you need to replace the fuel pump in the tank.
It should be above freezing. Normally around 40-42 deg. F