Thread: Is Cold Idle Too fast ?

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Here is what my 2bbl carb on the 289 does on a cold crank and I will ask my question at the end, OK?

here is my cold engine - - the outside temp around 80 degrees



pump accelerator and crank - - engine running at 1300 RPMs



allow to idle at 1300 RPMs for approx a minute and then tap accelerator - - - engine drops to 1000 RPMs



allow engine warm to 190 at 1000 RPMs and then tapped accelerator again - - - engine dropped to 750 RPMs and idling smoothly



OK, I have said all of that to ASK this question:
Considering that if I don't crank it often then the lifters drain out and will tap some at cold crank. ??will the 1300RPMs?? damage my engine while pumping up and filling the lifters - - AND - - - should I get the idle lower at initial cold crank? ALSO, is the small phillips head screw behind the electric choke housing the way to change my cold idle???

(footnote: the reason this is so long is because of my limited vocabulary - - - pic worth a 1000 words yanno?)

a 1/4 in ratchet wrench is what i use. i set the cold idle as low as it will stay running .

Thanks Shine, do I do that at the choke when first cranked?

yes. remember once you hit the key the coil heats. i disconnect the choke while setting the high idle.

will do, I"ll let you know if I'm successful - - TA

I always used a sort of rule of thumb that cold idle be 300 t0 500 over hot idle, and the step downs on yours sound just about right to me.

I agree with Rrumbler, although hot idle sounds high to me.