Edelbrock Carb Question
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Joined: Oct 2002
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From: Valley Center, CA
Edelbrock Carb Question
I have a 1406 carb on my 289/with a c4. My engine is sluggish in city driving at about 25 mph. It seems to bog until it has about half throttle. I have already changed out the mettering rods for a richer mix, but I think that the problem may be with the rod springs. Reading in the manual, it shows me colors for the springs on the metering rods vs the vacuum. My question is: Is the vacuum to be measured at idle or at mid-range engine speed?? Thanks, John 
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Joined: Sep 2000
Posts: 3,862
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From: Beachville, Ontario
Check it while you are driving, the idea behind the springs & rods is to run lean when cruising and go richer if you get on the gas (less vacuum). I also think you might need to go leaner instead of rich with your tuning.
Thanks, I'll give it a try. John
