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Ronald Rogers 09-18-2016 11:57 PM

Hard starting and rough idle
 
To get my 1985 Mercedes to start I have to spray starting fluid in the intake. Otherwise engine will take continuous cranking for quite awhile to get engine to start and then rough idling for about one minute holding the gas pedal down before the engine will idle somewhat smoothly. Fuel pump and filter has been changed. Help

Kofi 09-19-2016 05:41 PM

look at injectors,

Elektri 09-20-2016 10:31 AM

Do a fuel pressure "internal leak test" as outlined in the factory service manual.

Check the cold start injector if you have one of those.

Frank Reiner 09-20-2016 11:15 AM

Quote:

Originally Posted by Ronald Rogers (Post 3637188)
To get my 1985 Mercedes to

Quote:

Originally Posted by Kofi (Post 3637401)
look at injectors,

Quote:

Originally Posted by Elektri (Post 3637551)
Do a fuel pressure "internal leak test" as outlined in the factory service manual.

Check the cold start injector if you have one of those.

First, however, determine specifically what model is the subject, and if injectors are involved, and what service manual, if any, would apply.

There were at least 10 different models for US delivery alone.


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