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 slackbo 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 13,133 nationwide Corvette listings starting at $3,900.

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 califcarson
Reputation 1,320
#2 carGrrl
Reputation 1,090
#3 Tom Demyan
Tom Demyan
Reputation 910
View All

Related Models For Sale

Used Chevrolet Camaro"
402 Great Deals out of 30,090 listings starting at $2,950
Used Ford Mustang"
693 Great Deals out of 36,848 listings starting at $1,500
Used Dodge Challenger"
213 Great Deals out of 17,244 listings starting at $11,888
Used Porsche 911"
135 Great Deals out of 4,270 listings starting at $10,900
Used Dodge Charger"
469 Great Deals out of 30,466 listings starting at $3,550
Used Mercedes-Benz SL-Class"
105 Great Deals out of 3,056 listings starting at $3,999

Used Cars For Sale

2016 Chevrolet Corvette For Sale
3,411 listings starting at $62,000
2015 Chevrolet Corvette For Sale
16 Great Deals out of 1,538 listings starting at $54,480
2014 Chevrolet Corvette For Sale
42 Great Deals out of 891 listings starting at $46,988
2013 Chevrolet Corvette For Sale
15 Great Deals out of 400 listings starting at $29,943
2012 Chevrolet Corvette For Sale
6 Great Deals out of 319 listings starting at $26,985