External Check Valve problem?

Frank Z · Mar 2, 2010

A simple question for those of you that have installed an external Check Valve as a result of a failure of the checkvalve in your fuel pump assembly.

Please provide the year of your rig and the nature of the problem that was a direct result of the external check valve installation.

It would help to know which check valve you used too.

Thanks folks

Also:
If you've installed one and not had any problems, please post up your details as well.

joe_peters · Mar 2, 2010

1990, no problema.

Purchased 3/8" inline fuel check valve from seller jbass195 on eBay for $14 plus $2 s/h.

Installed the check valve between the fuel filter and the tank, used two lined hose clamps from NAPA.

NOTE: if you have a post-fuel return line XJ DO NOT attempt an external check valve--you will likely blow the lid of your fuel rail dampner for your troubles.

smcdonaldaz · Mar 2, 2010

Can you define "post-fuel return line XJ"? I have a 93 with a 4.0

joe_peters · Mar 2, 2010

96 and down.

97+ relocated the fuel pressure regulator to the tank/pump assembly, eliminating the fuel return line, and added a fuel impulse dampner to the fuel rail.

Johnnie Walker · Mar 2, 2010

I used the BMW check valve.
I have 89XJ 4.0L .. typical long cranking time. Installed it in front of the fuel filter, between that and the engine. Has helped a bit.

Preda8or · Mar 30, 2010

Just to clear things up, I have a 98 xj so I can not use the external check valve? Is this correct? Thanks

Frank Z · Mar 30, 2010

Yes you can, but the Pressure Regulator/filter can be replaced if you opt to go that route. It contains the checkvalve.

Frank Z · Mar 30, 2010

http://www.berrysprinter.com/e-fiche/model years/cd3/97-01/98xj.pdf
Page 239
Item #4, P/N 04798301

Preda8or · Mar 30, 2010

Does the Pressure Regulator/filter have to be replaced or can I just put the valve inline like it sets?

Frank Z · Mar 30, 2010

You can do it either way.

Preda8or · Mar 30, 2010

(if you have a post-fuel return line XJ DO NOT attempt an external check valve--you will likely blow the lid of your fuel rail dampner for your troubles)

Would this apply on a 98? Thanks again

Frank Z · Mar 30, 2010

Sorry, but that's bad tech and simply not true.

External Check Valve problem?

Frank Z

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joe_peters

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smcdonaldaz

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joe_peters

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Johnnie Walker

Piece of Fish!

Preda8or

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Frank Z

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Frank Z

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Preda8or

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Frank Z

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Preda8or

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Frank Z

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