1998 BMW 528 Car won't go fast enough

Tiny
HOTCADDY02
  • MEMBER
  • 1998 BMW 528
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 154,700 MILES
Hi
I am having some issue with my BMW 528I. Until the engine warms up or being on idle for 5 to 10 min. The car won't go fast at all. Even if I step on the speed pedal hard and RPM gets over 4. The car drives very slowly. Any help would be appreciated.
Monday, March 24th, 2008 AT 10:26 PM

1 Reply

Tiny
PEAR69
  • MECHANIC
  • 1,482 POSTS
Do you mean that you are going fast with a cold engine? If so, that is a very bad idea. How fast are we talkin'?
Your engine oil needs a chance to warm up so it can flow through your engine and provide a hydraulic wedge between moving metal parts. When oil is cold it acts like cold syrup. It clings to metal parts instead of flowing. This clinging slows down the power output of the engine until the oil warms up. That is why all race cars warm up the oil before they even turn over the engine.
Your engine may also have a oil flow sensor that controls the power output based on the oil temperature.
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Monday, March 24th, 2008 AT 10:40 PM

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