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Car will not start

Tiny
WINGWALKER450
  • MEMBER
  • 1988 MERCEDES BENZ 300SE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190 MILES
My car listed above (300 SEL model) would run for about five miles then stall. It would restart after about thirty minutes. After about eight times of doing this it stopped running all together. I replaced the fuel pump, filter and relay switch. Still would not start, so I replaced the fuel pressure regulator with no luck. Earlier in the year I replaced the plugs and wires and it was running well. I am stuck. Any help would be greatly appreciated.

Thanks.
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Friday, September 14th, 2018 AT 8:39 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi and thanks for using 2CarPros.com.

Based on your description, it sounds like there may be an issue with the crankshaft position sensor. Take a look at this link.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Check to make sure the engine is getting spark. Here is a link that shows how that is done:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

______________________________________

If you determine that the sensor is bad, it is mounted to the crankcase above the starter flange. I attached pictures of what the sensor looks like and its location for you to see.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Saturday, September 15th, 2018 AT 7:56 PM

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