389 with carter AFB stumbles when you kick it. Just easing into it it runs ok. I have rebuilt carb twice ,changed fuel filter ect. Do you have any suggestions?


Asked by jcsimms Aug 15, 2017 at 12:34 PM about the 1965 Pontiac GTO Coupe

Question type: Maintenance & Repair

2 Answers


Not to worry. Find an old carburetor guy who can open up the top of the carb and set the "accelerator pumps" richer to squirt out more gas when you floor it. With the motor idling you should see gas being squirted down into the carb when you pump the gas. It just needs more gas. You know that GTO takes a big gulp of air, and that air needs to quickly mix with gas to get power. The "power jets" further down below don't respond quickly because they need a huge flow of air to suck gas do into the intake. You can probably do it yourself trial and error and you will know when you get it right....that GTO will scream! I bet you can do it yourself, having rebuilt the carb and all. Good Luck my friend.

1 people found this helpful.

Thank you I give it a shot

1 people found this helpful.

Your Answer:

Pontiac GTO Experts

  • #1
  • #2
    Norm Davis
  • #3
View All

Find great deals from top-rated dealers


Related Models For Sale

Used Ford Mustang
31 Great Deals out of 1,096 listings starting at $4,999
Used Chevrolet Corvette
23 Great Deals out of 300 listings starting at $9,995
Used Dodge Charger
25 Great Deals out of 603 listings starting at $3,947
Used Pontiac Grand Prix
18 listings starting at $1,500
Used Chevrolet Impala
19 Great Deals out of 503 listings starting at $2,200

Used Cars For Sale

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.