Thread: Exhaust popping
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Old 12-01-2009, 07:35 PM   #9
chicklin
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Join Date: Jun 2008
Location: Kansas City, MO
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Re: Exhaust popping

Quote:
Originally Posted by chicklin View Post
Did some more tinkering today. Finally figured up the MPG for this thing: 8.6 mpg. Not good. I also noticed that I can get it to pop and blow out a plume of black smoke while in park after it's good and warm.

So, obviously, I am getting a bunch of unburnt fuel in the exhaust due to it running rich (at least that seems right to me). So, where do I start troubleshooting this? I have a brand new rebuilt carb that I ordered online, but I guess I really have no idea how it is adjusted. Like I mentioned, the idle screws are about 3 turns out, but that should have very little to do with the mileage driving back and forth to work on the interstate, right?

Is there some way to adjust the other jets in this carb? Or, is there something else causing the rich condition? It's a stock Quadrajet E4ME.
Forgot to mention:

Stock 350
4 bbl carb
31" tires
700R4 and I use the overdrive on the highway
3.42 gears

Shouldn't I be getting at least 12-14mpg? Heck, the specs for that year say 15.
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