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Recommended Posts

Posted

I've got an intermittent engine cut out issue. I need to check the fuel pressure but see lots on Amazon. Is the test point connector common or difficult to find?

Does the durametric show rail pressure?

Posted

The test point is just behind thr AC compressor on the right top of the engine. Its a schrader valve and your supposed to change the O ring inside the cap each time you open it, I never have. You need a gauge thet reads to 100 PSI. Its supposed to read one pressure at idle and another at 3k RPM.

  • Moderators
Posted

Actron has a Pro model fuel pressure unit (CP 7838 about $50) that you can get the $3 adaptor for and does the job perfectly.

51VH3605J3L._SL500_AA300_.jpg

Posted

Thanks for the pointers.

JFP: is there a particular name/size for the Porsche adaptor? Or is it VW spec? What should I ask for.

Sorry I'm a newbie to fuel pressure testing.

  • Moderators
Posted

I believe the Actron part is the shrader adapter 180-000-1299 (About $3), but as I am away from the shop at the moment, you might want to give Actron a call to confirm that.

Posted

If you are near a harbor freight their A/C manifold tester kit works fine for this purpose as well. Around $50 as well. Includes all the right fittings.

  • Moderators
Posted (edited)

We prefer the Actron because it has a side pressure vent line to dump the system pressure before disconnecting (saves on clean up and smell), which can also be used to test fuel delivery rates. As it also comes with an collection of adaptors, and Acton/SPX introduce more adaptors at low cost when new systems come out, it never goes out of date and can be used on just about any make. I would also be concerned about someone using the A/C unit on an A/C system after it has had gas in it; I do not know how the A/C would respond to fuel or fuel residues in the system as most are pretty bad about comtamination................

Edited by JFP in PA
Posted

The HF unit can also release pressure before disconnecting.

I had the same concern with my kit JFP, so I put a big ptouch label on the box: FOR FUEL ONLY!

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