My 73 starts to spit & stutter when going over 50 mph, it almost shuts down and backfires a litte. Runs fine under 50 mph. Help?


Asked by Dec 09, 2006 at 02:04 PM about the 1973 Chevrolet Corvette

Question type: Maintenance & Repair

I just bought this car. I got on the freeway and it started to spit & stutter, and just stopped running. I would pull over and it would start right up and as soon as I hit abput 50 mph the same thing. I changed the fuel filter which was old & dirty, and the air filter which was the same. Sprayed the carb with carb cleaner & tried it again. It runs great under 50 mph but doesn't want to keep running past that.
Thanks in advance.

4 Answers


The most common reason for sputtering or backfiring is spark plug wires shorting out, electrical wire shorting out, or water in the fuel tank. That webpage should help you in trying to diagnose the problem.


This could well be your fuel pump. If the pump is starting to fail, it will not deliver enout fuel at sustained higher speeds - and the car behaves as if out of gas (the engine is effectively running out of gas) - but runs normally otherwise. The fuel pump's performance can be evaluated by measuring its output/time - but you'll have to locate the acceptable spec.


did u change filter in carb try that big joe from pitts


fuel pump or filter by carb or maybe carb float level to low or bad coil

Your Answer

Add photo

Related Questions


Looking for a Used Corvette in your area?

CarGurus has 20,234 nationwide Corvette listings starting at $3,688.


Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 John Carson
John Carson
Reputation 1,940
#2 carGrrl
Reputation 1,310
#3 Tom Demyan
Tom Demyan
Reputation 1,100
View All

Related Models For Sale

Used Chevrolet Camaro"
798 Great Deals out of 38,822 listings starting at $2,650
Used Ford Mustang"
733 Great Deals out of 41,077 listings starting at $900
Used Dodge Challenger"
436 Great Deals out of 25,366 listings starting at $7,980
Used Porsche 911"
147 Great Deals out of 4,434 listings starting at $12,995
Used Dodge Charger"
646 Great Deals out of 29,672 listings starting at $2,275
Used Mercedes-Benz SL-Class"
109 Great Deals out of 3,662 listings starting at $1,500

Used Cars For Sale

2017 Chevrolet Corvette For Sale
5,618 listings starting at $48,940
2016 Chevrolet Corvette For Sale
48 Great Deals out of 4,019 listings starting at $44,900
2015 Chevrolet Corvette For Sale
46 Great Deals out of 944 listings starting at $41,900
2014 Chevrolet Corvette For Sale
39 Great Deals out of 1,013 listings starting at $37,074
2013 Chevrolet Corvette For Sale
13 Great Deals out of 441 listings starting at $25,500