weird high idle with nearly empty tank Options

[dax1969]

Hi,

I have a 74 2.0 FI and car idles, after warming up, at a normal 850/900 rpm

Yesterday however I had something weird ... In the morning (really cold outside) everything was normal (higher idle on start up, normal idle when warmed up)
but on the way back the idle remained at 1200 rpm. I immediately thought vacuumleak.

I needed gas as I was running very very low on fuel (warning light came on, never saw it before (IMG:style_emoticons/default/biggrin.gif) ) ... fyi, my tank is shiny and clean as I cleaned and coated the tank last year.

After filling up the idle went back to normal... Drove the car again next day, same...all normal.

Can low on fuel cause a higher idle ?

weird

cheers
Dax

[wonkipop]

just shows that a 914 can actually empty its tank bone dry and the pump can scavenge and deliver all the way to that last bit at just sufficient pressure.
not many cars can do that these days with internal tank fuel pumps.
you usually just get a splutter and they conk out.

i remember my dads old victa 2 stroke lawnmower did exactly this high rev thing as the last gasp when you switched it off. because you turned off the fuel tap and it then emptied the carby bowl to shut down. it did not have a kill switch.