Where is the Schraeder fitting on the...

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Author Message   tdixon (Aztimmy) Posted on Sunday, June 16, 2002 - 08:50 pm:    Is it on the right bank side with a little black plastic cap that you screw off? This is in line w/the 3.9 logo on the plenum, and in line between the #6 and #4 spark plug? What is the recommended PSI also? 32? Thanks for your help!!   Mike Rupp (Mike_Rupp) Posted on Monday, June 17, 2002 - 11:15 am:    The Schraeder valve is for testing fuel pressure. Recommended pressure: Ignition on, engine off: 34-37psi Engine running 30psi   tdixon (Aztimmy) Posted on Monday, June 17, 2002 - 12:10 pm:    Thanks Mike...but WHERE is it?   tdixon (Aztimmy) Posted on Monday, June 17, 2002 - 09:14 pm:    Any help would be appreciated!!   Jeff Sittler (Mindblender) Posted on Monday, June 17, 2002 - 10:12 pm:    I looked in my Workshop Manual for my '96 Discovery and I did not see a reference to the schraeder valve. I did see the specs stating the fuel pressure but no mention on how to test the pressure. If I overlooked it, I would like to know what section the information is in. Thanks, Jeff   tdixon (Aztimmy) Posted on Tuesday, June 18, 2002 - 12:22 pm:    Doesnt ANYONE know where this is? I could really use the boards help! Thanks!   Dee Posted on Tuesday, June 18, 2002 - 01:02 pm:    It should be on the fuel rail left side while looking at the engine. It has a black cap on it.   Dee Posted on Tuesday, June 18, 2002 - 01:05 pm:    I forgot to add this on my last post The older 3.5, 3.9 EFI engines do not have a schraeder valve. a special setup is required to test the FP.   Mike Rupp (Mike_Rupp) Posted on Tuesday, June 18, 2002 - 04:47 pm:    Dee: I think the 3.9 engines have the same fuel rail as the 4.0. The Schreader valve is in the same place on my brother's '94 as my '97.   Dee Posted on Tuesday, June 18, 2002 - 05:06 pm:    Mike, Not sure of the year the valve showed up my 88 did not have one untill i upgraded the rail   tdixon (Aztimmy) Posted on Tuesday, June 18, 2002 - 07:47 pm:    Thanks guys! Thats what i thought. There is one on my 3.9 with a little black cap on the right side (left side while standing in front looking at engine) I really appreciate your guy's help. Now i can go and put a tester on it to see if my Fuel pump is going bad.