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  #1  
Old 07-01-2019, 12:09 PM
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Engine stalls sometimes while driving in 1990 300TE

About 4 times a year my W124 stalls while driving, almost always when coming to a stop or parking.

It cuts with no warning and all the dashboard warning lights come on, as if I had turned the key. Usually I can't tell it stalled except for the lights.

I know it could be the OVP, and I remember that there is another part that delivers electrical power that has brushes that wear down, but I can't remember what that is called, it's not the alternator.
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  #2  
Old 07-01-2019, 04:46 PM
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Start from post #24 onward. EHA valve

systematic testing of fuel components
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  #3  
Old 07-01-2019, 05:23 PM
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there's a speed sensor in the back of the speedo that feeds the fuel system. always a stall at stop, always restarts. used to do them once a month in the late 80's.
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Old 07-02-2019, 04:56 PM
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Wow, I wish I had known that when chasing the same issue on my 300E 7 years ago.....it used to do it when coming to a stop, or sometimes when coasting through a turn.....more like 4 times a week than per year.....ended up trading it.
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Old 07-02-2019, 06:13 PM
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Thanks, can you give me more info about what it is properly called? A google search turned up several different speed sensors.
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Old 07-02-2019, 06:53 PM
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007 542 29 17. nla from mb.
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  #7  
Old 07-03-2019, 04:17 AM
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Quote:
Originally Posted by duchamp View Post
About 4 times a year my W124 stalls while driving, almost always when coming to a stop or parking.

It cuts with no warning and all the dashboard warning lights come on, as if I had turned the key. Usually I can't tell it stalled except for the lights.

I know it could be the OVP, and I remember that there is another part that delivers electrical power that has brushes that wear down, but I can't remember what that is called, it's not the alternator.
M103 Airflow Potentiometer wear.
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  #8  
Old 07-03-2019, 02:51 PM
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The part your thinking about is in the alternator, the voltage regulator
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Old 07-03-2019, 04:23 PM
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Thanks!
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  #10  
Old 07-05-2019, 05:51 AM
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duchamp, when was the fuel filter replaced last? That could be your problem. Fuel filters should be replaced every 60,000 miles in that vintage automobile.
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  #11  
Old 07-10-2019, 02:02 PM
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You mentioned OVP- did you replace it? If you don't know it's history, buy a new one The 103 engine is really picky about electrical charge, and I'd replace the voltage regulator too.
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