2001 BMW X5 Replaced fuel pump and still has starting probl

Tiny
LIAM404
  • MEMBER
  • 2001 BMW X5
  • V8
  • 4WD
  • AUTOMATIC
  • 109,000 MILES
My X5 surged 3 times, then cut out on the highway 2 weeks ago after driving for just over 1 hour. It wouldn't start after that: starter engaged, but engine would not fire. Towed 27 miles to service centre. Started after coming off tow truck. Faulted as cam position sensor. Sensor replaced, but engine cut out again on test drive. Fuel pump replaced. Car ran fine on test drive. When I went to pick it up, it would not start. Starter motor stayed on, then car almost started but ran rough and cut out when gas pedal pushed. Service centre said it was 'out of fuel' although 20 litres (5 gallons) was showing on the gage. Car ran fine for 2 days and was returned to me. It still starts badly every 3 or 4 starts, with starter motor staying engaged or re engaging, and the engine not firing. When it does start, it revs to 1800RPM, then drops back to idle. Occasionally when driving, the engine surges/looses power, but does not cut out. Ambient temps in Perth Australia have been between 80 and 100F for the last 6 weeks. Could this be the automatic choke function?
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Saturday, January 30th, 2010 AT 7:06 AM

5 Replies

Tiny
DR. HAGERTY
  • MEMBER
Repost with the VIN and I'll see if I can assist mate.
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Saturday, January 30th, 2010 AT 7:21 PM
Tiny
LIAM404
  • MEMBER
Hi Doc, the VIN is WBAFB320XLH63077.
Also, the replacement of the fuel pump has rendered the fuel gage inaccurate: it showed 20litres when it was delivered back to me yesterday, but then took 45 litres to fill it to capacity. Then, the gage only showed 40 litres when it was full. Not sure if related, but.
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Saturday, January 30th, 2010 AT 7:51 PM
Tiny
DR. HAGERTY
  • MEMBER
Has the intake manifold been off for replacement of the gaskets and PCV plate? Is the engine using oil?
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Tuesday, February 2nd, 2010 AT 8:38 AM
Tiny
LIAM404
  • MEMBER
Ok, I've just had a report back from the second mechanic. Starting problem traced to pressure loss from fuel pump after shutdown. Original 6mm hose used on new fuel pump. Pressure bled down to 100 from 400, so took 30 seconds at least of cranking to start. One line snagged from sender unit, hence underreading fuel gage. Hadn't noticed it using oil, but apparently the upper timing cover lower gasket and rocker cover gaskets are in bad condition and are leaking 5 drips in 2 hours of running. There is an EMS fault code of 'fuel economy' relating to a faulty thermostat. I have a coolant leak also. The torque converter clutch is on it's way out also, and the tachometer shows 200rpm fluctuations at around 68kph (42mph), and there is a noise above 3500rpm in first gear, indicating that the transmission's life is limited. Not the news I wanted!
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Tuesday, February 2nd, 2010 AT 11:37 PM
Tiny
DR. HAGERTY
  • MEMBER
No, it is not.
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Friday, February 5th, 2010 AT 10:03 PM

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