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Old 01-27-2013, 03:37 AM
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BMWFatherFigure BMWFatherFigure is offline
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Location: Perth, Western Australia
Join Date: Aug 2012
Posts: 4,116
Mein Auto: E23;E32;E34;E38;R50;R55
Try clamping the rubber parts of the fuel supply pipe and fule return pipe, one at a time. That will tell you which way the pressure is being lost. If neither make any difference (ie you still get a loss) it points to leaking injectors or an external (pipe) leak. Not much fuel needs to leak to reduce the pressure. Also join in a gauge if possible to watch the pressure go down.
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3 x E32 735iL (Alpine White, Glacier Blue & Kashmir Beige); 2 X E38 735iL (Oxford Green & Alpine White); E53 X5 4.4i (Pearl Beige); R50 Cooper; R55 Cooper Clubman (Both Pure Silver).
E38 Parts Car
E21 318i; E23 735i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?
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