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  #1  
Old 08-08-2000, 08:41 PM
chris keogh
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My 450 SL does not like a hot start. When cold starts every time. When hot engine fires, then dies. Any ideas?
Chris
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  #2  
Old 08-08-2000, 08:45 PM
bf
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mine has the same symptom when it's anything over normal operating temperature. MB dealer claims I need a new idle valve ($287) but I'm not sure if that is the actual cause of this problem.
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  #3  
Old 08-09-2000, 07:04 PM
chris keogh
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Thanks for your comments. If I get anything definitive, I'll let you know.
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  #4  
Old 08-09-2000, 07:54 PM
Larry Delor's Avatar
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Join Date: Jun 1999
Location: Sarasota, Fl.
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Once it does start, is there any black smoke, or rough idling?
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  #5  
Old 08-09-2000, 09:01 PM
chris keogh
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Larry, once it starts there is no adverse signs axcept that the engine dies, almost as if it is starved of fuel.
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  #6  
Old 08-09-2000, 10:06 PM
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Join Date: Mar 2000
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You have fuel pressure drop off and then vapor lock as a result.

The system should maintain about 3 bar residual pressure for long enough for the motor to cool. This isn't a problem cold and fuel pressure often drops to zero over night, but builds almost instantly.

Common problem is pump check valve or pressure accumulator diaphram.

------------------
Steve Brotherton
Owner 24 bay BSC
Bosch Master, ASE master L1
26 years MB technician
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  #7  
Old 08-14-2000, 09:36 PM
chris keogh
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I should have mentioned that the motor also cuts off sometimes when I come to a stop at a light or stop sign. Would that be a sympton of the two causes you mentioned.
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