My car will sometimes randomly shut off. So far it has happened 3 times. Once as I was driving about 20 mph, the car lost power and dash lights lit up and I was able to drift to the spider of the road and restart car. Another time I was on the freeway sitting in traffic and the car engine cut off, I put the car in neutral and restarted it. Another time I was just sitting in my driveway, car in D, but I wasn't moving and the engine shut off. The last time it happened I was reversing out of my driveway and as I began to turn the wheel it shut off. I did notice that my car idles high sometimes and sometimes its fine. I checked the ovp and both fuses are fine. I also checked the voltage regulator visually by taking it out of the alternator and it seems fine. Any suggestions?

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1990 190E 3.0L

I had the same thing happening in my '97 CL500. We checked the codes and it said the MAF was defective! We pulled it, cleaned it but the problem remained. $320 later with a new MAF the problem disappeared along with the error code. Go figure!
Anziani
'95 E420 130K
'97 CL500 135K

What year?

Fuel pump relay?

CPS? (don't know if it even has one of those)

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

+1

Need to know more details than just "190E 2.6" because the fuel pump relay changed during the later models.

Could be any: OVP, FPR, low compression, CPS, MAS, etc.

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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg

1990

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1990 190E 3.0L

Check your alterntor properly, get your dvm and place it on the battery, start her and get a friend to rev and keep the rpms at 2500, you should have a steady 13.8-14.2 volts. After that have friend turn all electronics on full, it should still bein the range.

Before, what is the voltage before start? If below 12.8, the battery is drained.

Jim

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05 CLK320 Cabrio
85 911 Carrera Targa
96 Lexus ES300

Maybe you can learn a thing or two from Drew's novel

Stalling Again - Benzworld.org - Mercedes-Benz Discussion Forum

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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg

The way it stalls & restarts suggests an issue with the "air flow position sensor".

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A new MAF solved it for me. See Post #2 above.
Anziani

Is that the mechanical predecessor to the MAF or something different?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

If you do not know the history of the OVP, replace it. Cheap insurance as they say.

The fuses may be "good", but an OVP fills up with dirt, or corrodes over time, or solder fails, or all.

ovp replaced 7/9/10

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1990 190E 3.0L

I think around 90 they moved to the MAS relay for fuel pump power however on my 89 420SEL the fuel pump relay had a cold solder joint on the fuel pump relay which would cause the fuel pump to randomly get turned off.

On my 190E I had a simliar problem with the car turning off randomly. It turned out to be both bad spark plug wires and bad OVP solder joints. I resoldered the OVP and it has been fine ever since.

420SEL Randomly Stalling?

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82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

It could be the crankshaft position sensor ckp. You can replace another one yourself. My car used to crank but wouldnot start and after i replaced it, starts all the time after. It also stalls sometimes while driving.