Hello every one. may be my question is silly.

The car is a W124 260E euro 1988.

After a complete refurbishment of all ECU connector contacts, I have no more Cold start as usual. The car starts after several attempts with with very low RPMs around 300.

Then it improves with temperature until +/- 700.

TF Signal on Fuel pump relay is as expected ( 2-3V at cold and 0.3V when hot).

Any ideas where/how I can identify the probleme?

Thanks in advance.

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Keep us posted especially if your problem is solved
Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class, 220CDI, 2009, W204

Sold: E-class 260E, 1988, W124, Wonderfull car sold after 489 000 kilometres of reliable services (engine M103, clutch, brake system and 5 speed manual gear box all original).

Sold: E-class, 320CDI, W210, 2000, 225 000km