92 W124 400E Hot Start Issue
 

Hello, I'm more a M104/103 guy, but my friend just recently bought a 92 400E, and it has a hot start issue, (when the car is warm) and he turns on the car it doesn't want to stay idling
So far a local benz shop has changed the fuel pump and filter, its helped but not fixed it
Any idea what else to swap /change?

Check the fuel pressure regulator for gas leaking though into the vacuum line. Also check that the purge valve isn't stuck open.

If it's a Bosch KE fuel system, check the fuel accumulator. Search for threads started by me for a simple on the car test of its ability to hold pressure.


Duke