Recently the engine malfunction lamp on my 1997 Xantia turbo-diesel (1905cc - Bosch inj pump) flashes up when decelerating in gear - particularly in third for example slowing down for a junction etc. As soon as the throttle is pressed, the light goes out. Typically Citroen though - this doesn't happen all the time. More seriously it also cut out when changing down a gear but re-started perfectly and hasn't done it since but it did previously do this three years ago! Again, car re-started fine.
There's no excessive smoke and fuel consumption is around 48 to 50 mpg. I also noticed that on a cold start, the idle is high but doesn't reduce when fully warmed up. After checking the vacuum pump I noticed it doesn't produce vacuum so I swapped it for a known good unit. I also checked all the vacuum hoses to the cold idle control, the two bulkhead mounted solenoid valves and the EGR unit. The hoses are good and air tight but noticed the solenoids weren't operating. There's 12 volts at the connectors but when I fed an external 12 volt supply the solenoids didn't click open/shut. What worries me is my local Citroen main dealer couldn't find them on their parts database! Anyone out there know of a good alternative supplier of these solenoids as driving around with a fully open EGR doesn't do the turbo any good. I was thinking of adapting a pair of washing machine water valve solenoids but want to know if anyone else has experienced this problem. Apart from that, the car is in good condition and continues to give good service.
Since Citroen dealers don't seem to know where these solenoids are, they can be found on the nearside bulkhead next to the LHM reservoir and inlet air trunking.