heavy blue smoke on start up !

[jpliddy]

hi thanks for your valued input, im stating to think about cold start device , i swopped this for another second hand device good few years back , i have a sore one on a spare injection pump , reason being im thinking this i started car this morning and outside temperature was 10 degrees C above yesterday it was 2 below C yesterday today 8 C not as much smoke plus I've noticed rev counter only goes up to about 900 revs on cold engine start up perhaps wax stat is shot too , i can test this in a saucepan of boiling water and see how far the wax stat plunger goes out in the hot water , is that correct ?

[ngoma]

Yes correct but much easier would be to take a clear photo of the cold start lever after the engine has been running and fully warmed up, and take another photo after the engine has had an extended cold soak. Or vice versa. Compare the lever position, that should tell you if the waxstat is functioning.

BUT: Doesn't a waxstat failure cause an "always on" condition? If the waxstat fails it will never allow the CX timing adv./idle speed increase lever to move to "warmed up" mode? So the IP will eternally be stuck in "cold" mode.

That's why those of us with failed waxstats have to disengage the end of the cable stop to let the engine run normally.

Properly tuned, the greenbook states there should be a 200 RPM difference between hot and cold idle speed.

[jpliddy]

thanks NGOMA
i have checked the travel of the cold start start cable i guess it travels about 9 mm , forwards and backwards so to say , but thats all i really know about this device

[jpliddy]

hello on start up i notice the revs only go up to 950ish rpm ,if the cold start device is set up correctly it shoud be about 1050 rpm for a short while till engine is hot and cold start device releases the cable ,