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Old 12-30-2015, 01:38 PM
jfoj jfoj is offline
Join Date: Dec 2010
Location: Fairfax, VA
Posts: 758
jfoj is on a distinguished road

You have the M54 I6 engine as I recall.

I believe the fuel pressure should be Fuel pressure 3.5 +/- 0.2 bar or 50.76 +/- 2.9 PSI? Although 45 PSI is not far off, I would be double checking this along with your gauge.

How steep is the hill you are dealing with at the house?

I will need to read back over everything again in more detail as I have many vehicles in my head that I am dealing with.

Fuel pump was replaced? If so, what brand & where purchased?

I think the Fuel System Status changing to 8 here is the key, but the question is why. This usually occurs when the O2 sensor output does not toggle back and forth and follow the engine fuel management changes. I am starting to think there is possibly some Lean/fuel starvation problem here??

I understand you say the fuel pressure gauge did not move, but often the gauges do not connect properly. Did you see a quick drop in pressure when you shut the vehicle off?

Post any Freeze Frame data you get from both the driveway and cruising if you can get it.
2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.
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