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Stalls at idle hard to restart

Tiny
EEDOG300E
  • MEMBER
  • 1988 MERCEDES BENZ 300E
Engine Performance problem 6 cyl Two Wheel Drive Automatic 147k miles

1988 Mercedes Benz 300E - 3.0L Gasoline F.I. 145Miles Engine starts perfect, drives perfect. After 5 minutes, engine begins stall at idle speed only.

Eventually engine will stall and become nearly impossible to restart.
Use of accelerator pedal will maintain higher RPMs to keep engine running.
After approximately hour of downtime, engine will restart and the cycle begins again.

No components have been replaced for this issue. Just plenty of resetting. Considering Coolant Temp. Sensor replacement

Please help I love this site!
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Thursday, April 8th, 2010 AT 12:12 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,861 POSTS
Hello,

This is a classic vacuum leak problem. Please follow this guide and run a test.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/stall-at-idle

Please run some tests and get back to us we are interested to see what it is.

Cheers, Ken
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Friday, July 7th, 2017 AT 3:52 PM

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