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so ive ben fighting carb issues in my duster for a while. its bad enough to where ive all but stopped driving it.

idle mixture is set properly with a vacuum gauge, with the ac compressor on, fully warmed up.

electric fuel pump, regulated to 5.5 psi.

floats set to 1/2 from the carb gasket to the top of the float with the cover inverted.

stock jets, rods, and springs.

3/8 thick insulating carb gasket.

air gap intake

so my issues are a few fold.
1. will not restart hot. seems to be vapor locking.
2. doesn't pull nearly as hard as with the 850 double pumper I had.
3. erratic idle with ac compressor on.
4. diesels on cutoff.

while adjusting float level tonight in a vain attempt to solve the hot start issue, I forgot to put the metering rods and springs back in. no covers either. the car ran significantly better when I got on it. almost like the old double pumper. I was excited. when I put the rods back in, it was back to its same old tricks. I don't know if it was all in my head, but with no rods or covers the hot start issue seemed all but gone, but I didn't really validate that well. also didn't seem to even think about dieseling.


so what am I missing? im thinking that the rod and jet combo is way too lean, causing most my troubles, and the springs too stiff. does this sound right?

please, help me out here. I just want to finish out until my leg surgery driving this car.

Michael

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#1 is a known edelbrock issue, GOOGLE
Edelbrock heat soak,
Edelbrock, hot start,
Edelbrock percolating

#2 There is a large difference between a 600 and 850 CFM so I am not surprised. My thought is the 600 may be a sit small while the 850 is too large.

#3 Tuning issue or may need an idle step up solenoid

#4. Tuning, idle is too high, see #1