Fuel pressure

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linke30
E30 Zone Newbie
E30 Zone Newbie
Posts: 80
Joined: Sat Jun 17, 2017 11:00 pm

Post Sat May 18, 2024 2:16 pm

Afternoon guys.
Ive tried searching but can’t quite get to the bottom of it.
I’ve been following Bentley manual for fuel pressure tests. Trying to figure out an off idle hesitation.
Got it rigged up, jumped the relay and got 3 bar reading. Passed first test.
Then with engine idling Bentley says 2.8 - 3.2 bar.
I’m getting 2.5.
When the vacuum line is removed, it raises to 3 bar and return back when reconnected.
Is my low idle pressure still to do with the regulator, or something else like a vac leak?