Richard Daugird

Just replaced the rusty fuel tank in my '74 small block. 4 speed, headers, big mufflers in the stock location, Edelbrock(1406 I believe) carb and Performer intake. Big older model Mallory ignition(coil?). I guess it's stock otherwise. New rubber fuel line, cleaned the steel line. Still having drive-ability issues. At a constant speed, if I rev it a little, "Vroom" when I let off, I get a pop. Vroom, pop. Vroom, pop. Also, occasionally it bogs under heavy acceleration in first gear. Should I try cleaning the carb, or go ahead and rebuild it? Don't really know what to clean. Never have disassembled a carburetor, but I have removed and replaced many.

jnb5101

The only way to clean the carb is to disassemble it. The auto stores and discount places(Walmart) sell gallon cans of carb cleaner. Walmart also sells disposable aluminum cooking pans that are about 10"x10"-just the right size for the carb pieces. Get Cliff Rugles book. Also, if you are a little worried about rebuilding the carb, get the cheapest, dirty, POS carb (ebay or a member was selling one a few days ago) and disassemble that one first just for practice. It may sound like a waste of $35 or $40, but you've heard the adage "the difference between education and experience is that education is cheap".

Richard Daugird

I do have some old carbs I could practice on...but is a Quadrajet a good one for a first attempt? I also have a buddy who can do the job or fix it if I screw up, I just don't want to wait a month for him to do it!

ShipmanPhotos

Following.

In a similar boat and happen to have a spare (old crusty) quadrajet for some reason (No idea what it came out of) that looks identical to the one on my 77 L82. Thinking of doing my own rebuild and practicing on that one first. At least it would provide parts if I screw something up!

Decoded it and it's from a 79 Chevy but don't know what model. Truck probably.

redvetracr

have you inspected/changed your fuel filter yet? I might be plugged

Richard Daugird

Yes there were two filters on it and a box of filters behind the seat. I replaced the rubber fuel supply lines, put on a new filter, and cleaned the steel fuel line with carb cleaner and compressed air. I was anticipating replacing the tank and cleaning the carb before I even had the car, the previous owner told me the tank was rusty and carb was dirty.

mortgageguy

I would rebuild/clean the carb. There are some good books to walk you thru the process. It is overwhelming at first. Take your time, I used egg crates to label and keep small parts in order of dis-assembly. I rebuilt mine 19 years ago, it has worked great. I plan to rebuild it this winter, just to clean it.