stalls at idle hard to restart

1988 MERCEDES BENZ 300E
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EEDOG300E
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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!
Apr 8, 2010 at 12:12 PM
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STRAILER
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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
Jul 7, 2017 at 3:52 PM