Engine stalls sometimes while driving in 1990 300TE

[duchamp]

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.

[lsmalley]

Start from post #24 onward. EHA valve

http://www.peachparts.com/shopforum/tech-help/353372-systematic-testing-fuel-components.html

[porkface]

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.

[pawoSD]

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.

[duchamp]

Thanks, can you give me more info about what it is properly called? A google search turned up several different speed sensors.

[porkface]

007 542 29 17. nla from mb.

[altezza]

Originally Posted by duchamp

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.

[nulu]

The part your thinking about is in the alternator, the voltage regulator

[duchamp]

Thanks!

[Ferdman]

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.

[ds190]

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.