Have a problem with warm start

1993 MERCEDES BENZ 300SE
140,000 MILES • 3.2L • 6 CYL • 2WD • AUTOMATIC
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DOWKO1
  • MEMBER
  • 1 POST
Starts from cold fine can run few miles but when returning to start while warm will not start until it cools down. Also, when in park idles very high. could this be crankshaft position sensor or fuel pump regulator? Maybe ovp. please help
Dec 20, 2018 at 6:12 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,554 POSTS
Hello,

It sounds like you have a engine coolant temperature sensor that going out. Here is a guide to help walk you though the steps and a diagrams below to show you how on out car:

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Check out the diagrams (below). Please let us know what happens.
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Dec 22, 2018 at 6:22 AM
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