You are here:

Classic/Antique Car Repair/Fuel mileage-Quadrajet

Advertisement

Expert: - 11/9/2009


Question
I have a 84 Chevy C-20 PU with 1978 350 eng, with quadrajet carb.
Seems to run good but cant get over 10 mpg no matter what I've tried. What can I do to increase mileage? I'm open to anything that works. Thank in advance for your time and help

Answer
10 miles per gallon for a C 20 is not bad mileage. Before assaulting the carburetor check the rear end gears. If there is a tag on the rear end that will make it easy if there is no tag connect a tach to the engine and check the RPM at 60 miles per hour in high gear. Let me know and we will go from there. Also what size and type tire do you have?
Brad

Classic/Antique Car Repair

All Answers

Answers by Expert:

Ask Experts

Volunteer

Brad Sears

Expertise

All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.

Experience

Automotive tech instructor. Syndicated auto columnist 1970's though the early 1990's. Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's TV Show "Last Chance Garage" 1980's PBS-TV syndicated. Auto instructor for the following companies: Fram Autolyte Holly Carter AMF Ford Motor University Of Conn Blue Hills Technical School Sugar River Technical Center Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.

Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.

Education/Credentials
More than I care to remember. Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.

Awards and Honors
Moto Award winner. And much more.

©2012 About.com, a part of The New York Times Company. All rights reserved.