Well... After chasing vacuum gremlins and verifying fuel pressure was
correct, the only other thing was the float height.
After reading a less than descriptive Edelbrock manual, emailing
Edelbrock's tech (non)support, and consulting you fine people, I
decided to pull the top of the carb and have a go at it.
First thing I did was run over to Home Depot and get a set of sliding
calipers to measure the float height. After getting the airhorn off
and flipping it up-side-down, i measured the float height at exactly
7/16"--exactly what the manual says it should be. Flipped
right-side-up, the floats hung much lower than the recommended
15/16"-1". More like 1-1/4".
Based on the manual, the range of motion should be somewhere between
1/2" (7/16"-15/16") and 9/16" (7/16"-1").
Now, I was advised to try setting the float height at a higher setting,
say 3/8". This didn't make logical sense to me. It runs rich...that
means too much fuel. Setting the floats higher would only let even
more gas in there.
So I increased the distance between the float and airhorn gasket, then
bent the tab on the backside to limit its range of motion to within
about 1/2" from there. I double, triple, and quadruple checked the
I popped the airhorn back on (had to remove the metering rods to get it
to seat) and bolted it all back together. After reattaching all the
linkages and the fuel line, I was ready to fire it up.
As soon as I did so, I stuck my head out the window and looked at the
tailpipe. The usual gasoline steam wasn't shooting out, which was
good; my girlfriend's car is parked right next to it :-)
I smelled the fumes, waved them towards my eyes...no burn, no intense
stench of gas fumes. It simply smelled like normal, good old fashioned
After that, I came inside here to type this up and take a well deserved
grape soda and Marlboro Light break. I still need to go back out and
reset the timing back to somewhere close to stock, and reset the idle
speed. After that I'm going to take 'er out for a spin and see how she
does on the road.
Thanks to all who have helped, it's been a long road. Thank God it's