From: Paul Miller
>though it is still a 97 octane leaded fuel) and suggested installing a
>valve to "quench" the carbs with air when the ignition is turned off (I
>can't remember the details but presume it would work off the vacuum).
>Does all this sound plausible?
It COULD work because it will kill the depression in the inlet, and the
carb will no longer supply fuel to the deiseling motor.
It WOULD NOT work on engines that do this because of fuel
boilover into the inlet, because this simply will not stop the fuel.
Remember though, that a vaccum triggered dump may cure the
problem, but since vacuum is not present at startup, and the
inlet is dumped, the motor will never be able to make enough
vacuum to close off the dump valve.
A little thought will need to me made in order to overcome this
condition.
>when my Alpine is hot the idle speed sometimes rises from 800 to 1500
>RPM but mysteriously goes back down to 800 when left to idle for about
>20 seconds.
>Any Ideas?
Worn throttle shafts or lean running idle, with occasional raw fuel
pee'ing into inlet.
Happens on strombergs when the floats stick open.
"used to happen a-lot to me even after new needles and floats",
Happens on zeniths when fuel boils in the float bowls, and fuel
burps from the high speed bleed and booster venturi.
Rmember that the exhaust is right under those carbies.
Jarrid Gross
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 09:55:42 CDT