Mechanics

MERCEDES 300E HARD STARTING

1991 All Other Makes All Other Models

My 1991 300e, 170k, 6cyl, 4spd auto, will not start when cold. I have to use, gasp, starting fluid to get it going. When it warms up, it starts OK, it runs smoothly, no notable engine or belt noises, no overheating, shifts smoothly, accelerates a little slowly from standing start and at low rpm, but gets legs at about 3000 rpm. I am thinking fuel pump, but hate to start blindly replacing things. Any advice for trouble shooting and possible causes. Thanx
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Geobarry
March 21, 2006.



Check your thermo time switch, if it is shorted it will not let the enrichment protion of the fuel injection to operate when cold.

2CarPros Ken
Mar 22, 2006.