Peugeot 406 (1999 - 2004) - 03 2.0HDi Car not starting

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Thu 6 Aug 2009 18:37
03 2.0HDi Car not starting - arran man
I have an 03 406 estate, 50k miles, HDI 90 with a Siemens ecu. No problems until recently , when it failed to start. Engine would turn ok and tried to start, but cut out before reaching idling speed. When repeated later, same again, but higher revs before shut down (2 secs)
Diagnostics indicated a fuel regulator problem and the high pressure fuel pump was changed (Siemens version, no pump in the tank). The contacts for the regulator on the old pump were blackened, which suggested the solenoid had overheated. The car ran for three days, then same fault reoccurred.
Suggestion of dry joint in the ecu output to the regulator (pulsed earth), so ecu was changed for a refurbished unit. Ran perfectly for around three days, then back to the original fault. All wiring has been checked etc, for some reason, appears ecu is shutting down the engine. Any info on the regulator (inside the pump), is it normally shut to increase pressure until earth from ecu and frequency of earth pulse at idling speed.

Edited by Dynamic Dave on 06/08/2009 at 20:16

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