Re: Diesel Engines

Posted by Bob M on February 16, 2007 at 05:27:36 from (151.190.254.108):

In Reply to: Re: Diesel Engines posted by Gus on February 16, 2007 at 03:36:53:

Yes!

The Powerstroke under cold conditions (oil and coolant below certain temperatures, has been idling >2 minutes, transmission is in Park, etc) causes the engine computer to put it into "cold idle" mode. This increases the idle speed to 1,100 RPM and closes a back pressure valve in the exhaust outlet. These combine to make the engine to warm quickly and stay warm.

The restriction of backpressure valve is what gives the exhaust that 747-like roar you hear. Unfortunately also it causes the engine to burn more fuel at idle. But it DOES warm the engine up quickly!

Replies:

• Thanks Bob and Allan PatMz 09:19:54 02/16/07 (1)
  • Re: Thanks Bob and Allan Bob M 12:13:35 02/16/07 (0)

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