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. http://ezinearticles.com/?Does-Your-Car-Engine-Backfire?&id=2855 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:

Corvette

Looking for a Used Corvette in your area?

CarGurus has 14,571 nationwide Corvette listings starting at $3,500.

ZIP:

Chevrolet Corvette Experts

  • #1
    John Carson
    Reputation
    3,500
  • #2
    Vincent Parker
    Reputation
    3,170
  • #3
    F_O_R
    Reputation
    1,350
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used Chevrolet Camaro
354 Great Deals out of 24,317 listings starting at $2,495
Used Ford Mustang
503 Great Deals out of 41,426 listings starting at $2,000
Used Dodge Challenger
313 Great Deals out of 24,453 listings starting at $5,900
Used Porsche 911
170 Great Deals out of 5,301 listings starting at $10,450
Used Dodge Charger
500 Great Deals out of 25,459 listings starting at $1,500

Used Cars for Sale

2019 Chevrolet Corvette For Sale
8 Great Deals out of 5,693 listings starting at $43,690
2018 Chevrolet Corvette For Sale
15 Great Deals out of 313 listings starting at $42,488
2017 Chevrolet Corvette For Sale
29 Great Deals out of 719 listings starting at $34,921
2016 Chevrolet Corvette For Sale
30 Great Deals out of 786 listings starting at $34,976

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.