1995 BMW 525i

Tiny
ISSA
  • MEMBER
  • 1995 BMW 525I
Engine Performance problem
1995 BMW 525i 6 cyl Two Wheel Drive Manual

this vehicle consumes a lot more fuel: 1litre per 1 km; how do I repair or where do I start from?
Tuesday, May 25th, 2010 AT 9:05 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Probable causes of an engine running rich are as follows:

1. Fuel pressure not within specs. Can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.
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Thursday, May 27th, 2010 AT 1:42 AM

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