Jump to content
Forums Gone... but not forgotten!
Pontiac of the Month

JAH11's 1968 GTO

2024 June
of the Month

  • Rev up your passion for Pontiacs and join our vibrant community of enthusiasts!

    Whether you're a die-hard fan of classic muscle cars or you've got a soft spot for sleek modern models, you've found your home here at Forever Pontiac. Our community is dedicated to celebrating everything Pontiac, from the iconic GTO to the legendary Firebird and everything in between.

    Unlock access to expert advice, stunning photo galleries, engaging discussions, exclusive events, and more!

    Start your Pontiac journey with us today!

    Sign up now! 🏁

issue with 73 catalina


Recommended Posts

Hi. I am Lucas. I have a '73 catalina 2dr with 400 motor, 2gc carb, th375 trans. Car has 72,xxx on it. Car is pretty original but previous owner decided to spray the roof white. When buying the car I noticed the car had a new starter, fuel pump, fuel lines, looked like the ignition had been gone through (however still points), and he had told me the tank has been cleaned. I believed him because it fired up on the first crank. I bought it and took it home. Put on buick rallye's and fresh tires when I noticed the water pump started to leak. Replaced it and the radiator hoses and went on. Drove the car very regularly with very few issues when one day I drove it to school and simply didn't want to fire. Had to have it towed home. Tested the fuel pump and it was getting fuel to the carb. The plugs were sparking too. So I had the carb rebuilt. Now it runs but over half throttle or so it will stumble very bad when trying to return to idle. I rev it up a bit and will bump up to a higher idle that doesn't sound right. I tested for vacuum leaks around carb and found none. Any ideas?

Link to comment
Share on other sites

Tired of these Ads? Register Today!

A couple of quick things come to mind. 

1. Check your fuel filter. Remove it, and try to blow through it. If it's clogged replace it.

If the fuel tank was cleaned, it is possible for some of the gunk that was there o travel all the way to the carburetor. 

2. You said you have points still. Check to see if they've gotten worn. If so, replace them.

3. Check your initial timing. Is it where it should be?

4. Check the vacuum advance on the distributor - does it work with vacuum properly? Check the vacuum line to the vacuum advance, is it getting enough vacuum?

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Tired of these Ads? Purchase Enhanced Membership today to remove them!
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.