Weber 44 IDF mixture help needed Options

[tornik550]

I am working on getting my idle jets correct. My mains seem ok.

At idle (800 rpm) I am getting a reasonable air fuel ratio (14.8 using innovate a/f gauge). I'm using 50 size idles. If I slightly press and hold the peddle to a steady 1200 to 2000 rpm the a/f goes to 19. The car drives like crap until I reach 2000 rpm when the main jets kick in- at the same time the a/f ratio goes to 14 or so.

What adjustments can I make that will leave idle at the same mixture however rich up the mixture til about 2000 rpms? I thought that was mainly idle just only?

I did try to increase the idle jet size to 55. The idle mixture goes down to 11.8 at 800rpm and is perfect between 1200 to 2000 rpm. Confused- I can either get the idle correct OR the low rpms?

I have followed weber's info on best lean each time I switched jets.

Ideas? What am I missing- i'm sure its something simple.

[toolguy]

How does it run when it's cold and just started? a bunch of 'sneezing' and popping? That's usually the sign of the idle mixture too lean. . If it starts and idles fine cold , I'd leave it alone, but if it's burping, see if backing the idle mixture screws all out 1/2 turn fattens your idle readings. .

Do all the mixture screws make a change? are they all approximately turned out the same amount ? 1-2 turns ? If they are 3 or so turns out, then the idle jets may still be too small. .

What do the plugs look like?

[tornik550]

How does it run when it's cold and just started? a bunch of 'sneezing' and popping? That's usually the sign of the idle mixture too lean. . If it starts and idles fine cold , I'd leave it alone, but if it's burping, see if backing the idle mixture screws all out 1/2 turn fattens your idle readings. .

Do all the mixture screws make a change? are they all approximately turned out the same amount ? 1-2 turns ? If they are 3 or so turns out, then the idle jets may still be too small. .

What do the plugs look like?

I went out tonight and started the engine cold- it started right up and ran great. No burping or sputtering. All of my mixture screws are out 1.5 turns. I haven't checked the plugs yet. I will check them soon.

Considering that the car is running very well- Is it ok that I am getting an a/f ratio of 12.? at idle. I always hear about rich conditions washing fuel off the walls. I really don't want to hurt my engine more than needed.