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EDIT: Fuel pressure test is based on Regulated pressure 200 1988

uid 18083's pic
posted by  lucid on  Sun Jan 27 09:05 CST 2008
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last visit: Fri Oct 24 12:31 CST 2014
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Because what you need to test (per specs) is the regulated pressure.

The gauge is on a tee that is inserted inline, between the supply hose and the fuel rail. The regulator is connected at the other end of the rail and regulates the pressure by bleeding off the excess (above the specified values). Thus the gauge reads the pressure the the regulator "leaves in" the fuel rail. i.e., the "regulated" pressure.

My original post was hasty, and based on my intent to emphasize the "regulated" aspect of pressure testing, without giving the plumbing enough thought.

See Bentley 241-9 for LH 2.2 procedure and specs. ,Basically about 27 psi idling with regulator vac line connected—and 36psi with vac line removed and plugged (simulates throttle open/acceleration).

"K-Jet pressures and testing methods (below) don't apply to your LH FI system". I still stand by this comment. The method and DIY fitting linked shows a nice example of DIY work, but does not appear to allow the proper measurement of the two K-jet pressures: "Control" and "System".
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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New 1 Fuel pressure test [200][1988]
posted by  Bonzo  on Sun Jan 27 06:31 CST 2008 >


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