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Re: fuel pump replacement gone wrong...
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CarGuru > Jeep Willys > Re: fuel pump replacement gone wrong... 26 January 2005 01:55:12
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Re: fuel pump replacement gone wrong...

DougW 25 January 2005 16:19:25
 quincy451@yahoo.com did pass the time by typing:> So how important is the check value that goes into the fuel pump> assembly? I can not find one anywhere. The dealer will only sell me> one with there nifty $342 fuel pump to go with it. I am going to try> again as suggested here, but the car is currently across town to it> will be this weekend before the attempt is made.

The check valve prevents fuel from draining back into the tank so your
Jeep will start easier and there is less chance of air problems (stammering,
stuttering) when it's started. The check valve is easy to test with a simple
pressure gauge on the rail. Either it holds about 32psi for half an hour
or it drops to zero quickly)
From what I can gather the check valve not being there might make it> harder to start at times, but at this point it starts up ok...it is> just to keep it running which I think like those on here is a bunch of> air in the lines or something.

Possibly, don't discout the coil or other issues, check fuel pressure
and flow.
What is the schraeder valve? Is that where you release the fuel> pressure at the fuel injectors or something else. The valve I am> thinking of has a cap on it and is about like the valve in a bike tire.> But shoots gas out if pressed.

Correct. You found it.
http://members.cox.­net/wilsond/Fixes/pr­essure-test-port.jpg­
The guy I am working with is thinking of taking the washer out at the> bottom of the fuel pump assembly. I don't think that would hurt but> alot of work to get one washer out. The tank would have to come back> out.

Before you go ripping things apart, check the fuel pressure and flow rate.

The fuel pressure can also drop quickly if the regulator is bad.
You check the regulator by hooking up a fuel pressure gauge, starting the
engine (32 psi should show) then pull the vac line from the regulator
(located on the front of the fuel rail). Pressure should go up a few pounds.


--
DougW


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Will Honea 26 January 2005 01:55:12 [ permanent link ]
 On Tue, 25 Jan 2005 12:19:25 UTC "DougW"
<post.replies@inval­id.address> wrote:
What is the schraeder valve? Is that where you release the fuel> > pressure at the fuel injectors or something else. The valve I am> > thinking of has a cap on it and is about like the valve in a bike tire.> > But shoots gas out if pressed.>
Correct. You found it.> http://members.cox.­net/wilsond/Fixes/pr­essure-test-port.jpg­

Yep, and if that gas is squirting out with the ignition off, you don't
have a check valve problem!

Doug had the best advice: check the fuel pressure. A guage is
something like $15 and will answer a lot of questions real fast.

--
Will Honea
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CarGuru > Jeep Willys > Re: fuel pump replacement gone wrong... 26 January 2005 01:55:12
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