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Yikes! (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by Rob Levinson on June 19, 1999 at 00:59:35:

In Reply to: Test your diagnoatic skills (long) posted by John Millward on June 18, 1999 at 08:27:28:

: A word of warning however. I did a lot of messing about with fuel lines and my fuel pressure gauge set up was distinctly iffy. The fuel rail has quite a large volume and the pump can move a lot of fuel in a short time. Combine this with the sparks generated when hot wiring the pump (I used a lead between the battery and the pump fuse) and you have a recipe for disaster - SO BE CAREFUL and think about the possible consequences of what you are doing.

First of all, great story and diagnostic trail... this is the kind of thing that many owners can do once they get beyond the fear of opening the hood (bonnet for you, mate!).

Second, the way you checked the fuel pressure (and the danger involved!) scares me... what was wrong with putting an inline fuel pressure guage in with a "T" fitting? Run the car as normal and look at the guage, no danger except a few drops of gas on your fingers when you take the guage out.

I've spent quite a bit of time with such a setup taped to my windshield tuning the pressure for the ex-535i Turbo's rising-rate fuel pressure regulator.

- Rob Levinson

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