406 1.9 TD COLD START device

Hi,

It should raise the idle speed,

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.

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

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.

Hello Michael,

So I had a good supposition :-)

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.

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

Dont trust a computer. they go wrong.

electronics -

Are you really prepared to trust a computer to that extent?

Hi,

I usually don't, especially on CAD purposes, but for an idle speed I'd say yes ;-)

Regards, G.T

Hi Chris,

And in the other hand, so are humas, so what ? :-)

Regards, G.T