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.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

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