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Car Forum / Peugeot Cars / April 2006406 1.9 TD COLD START device
Gents This diesel engine is fitted with a cold start device operated from a vacuum switch which then operates a Bowden cable to move a leaver on the diesel pump. My questions are. 1) What does this device actually do 2) When should it operate ( I may be a bit niave here knowing the name) 3) How is the cable adjusted to operate correctly. The device is of very poor design as the Bowden cable contains no nipples on the ends. Hence due to the strong vacuum and the fact that it is only the plastic on the outer sheath that holds the outer cable from moving, after a number of years the business end on the diesel pump nolonger moves the leaver. Mike Hi, > 1) What does this device actually do It should raise the idle speed, > 2) When should it operate ( I may be a bit niave here knowing the name) You say vacuum operated, strange, all XUD's I've seen were temp-operated, does this car have aircon ? It should operate when cold, and being released when the engine warms up. I imagine it also raises the idle speed when the aircon is turned on. > 3) How is the cable adjusted to operate correctly. According to my 205D service manual, with a warm engine, pulling the cold-start cable should result in an extra 200RPM on the idle speed. If the value may be different, it should be the same method for 1.9TD. Perhaps it is given in the HBOL (I don't know this book of lies). HTH, G.T 205 Diesel & turbo-Diesel : www.205d.com Thanks GT My 406 has air con and the cold start device seems to operate all time the air con is on raising the RPM from 950 to 1150. . The vacuum is provided from the servo vacuum pump and then there is a switch which I guess is controlled from the engine ECU. Looks at though I need to re engineer the cable to a higher standard and then adjust so that the pump end operated when the engine is warm and air con is switched on. Mike > Hi, > [quoted text clipped - 16 lines] > G.T > 205 Diesel & turbo-Diesel : www.205d.com Hello Michael, > My 406 has air con and the cold start device seems to operate all time the > air con is on raising the RPM from 950 to 1150. . So I had a good supposition :-) > The vacuum is provided from the servo vacuum pump and then there is a switch > which I guess is controlled from the engine ECU. I don't think there's an engine ECU on these models (1.9TD, old-school Diesel, but nice), perhaps a little electronic box for dashboard / "comfort" systems though. I've seen this system of vacuum-controlled cold start system incidentally last week on an aircon fit to a Megane 1.9D, so I asked you. > Looks at though I need to re engineer the cable to a higher standard and > then adjust so that the pump end operated when the engine is warm and air > con is switched on. Anyway, the cold start setup *must* be done when the engine is warm. I guess you could report to the HBOL for good revs values (warm idle, revs increasement when lever pulled). Last idea : move on for a HDi, as this is fully controlled by electronics - nothing to do, LOL :-) Regards, G.T 205 Diesel & turbo-Diesel : www.205d.com > Last idea : move on for a HDi, as this is fully controlled by electronics - > nothing to do, LOL :-) Are you really prepared to trust a computer to that extent? >> Last idea : move on for a HDi, as this is fully controlled by > electronics - >> nothing to do, LOL :-) > > Are you really prepared to trust a computer to that extent? Dont trust a computer. they go wrong. Hi Chris, > Dont trust a computer. they go wrong. And in the other hand, so are humas, so what ? :-) Regards, G.T 205 Diesel & turbo-Diesel : www.205d.com Hi, > Are you really prepared to trust a computer to that extent? I usually don't, especially on CAD purposes, but for an idle speed I'd say yes ;-) Regards, G.T 205 Diesel & turbo-Diesel : www.205d.com |
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