Three years ago, I couldn't find the correct adapter to fit on the Schrader valve on the fuel rail of my M54. Even Andrewwynn didn't know the exact adapter to use, so I found a Ford adapter (also listed to fit BMWs) on Amazon. It wasn't an exact fit, and leaked badly, until I used a lot of Teflon tape. Then, the internal O-ring got shredded, so I never tried it again. See https://xoutpost.com/1220344-post51.html for details.

Fast forward to today: I ordered a different size of Ford adapter from Amazon, two of them for half the price of the earliers one, and whaddayaknow, it fits the Schrader perfectly! it's a "Fuel Injection Pressure Tester 305.32 Valve Adapter Replacement for F-o-r-d F150", https://www.amazon.com/dp/B09XBFM1Y9...fed_asin_title


No leaks, no runs, no errors! Grab a pair of them!

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01 BMW X5 E53,3.0i-5L40E, 7/13/01
topas-blau,Leder-grau,"resto-project car"

Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E

Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
67 Dodge Monaco 500 2dr ht.,383c.i.-A727
56 Chevy 210 4dr,265c.i.-PGlide