1970 Stingray- Carburetor issues
Thread Starter
4th Gear
Joined: Apr 2014
Posts: 4
Likes: 0
From: Austin Texas
1970 Stingray- Carburetor issues
I have a 454 big block on my vette. I am having trouble starting the car consistently. When it does, it does a lot of popping in the exhaust. Is that due to a bad air to gas ratio in my carburetor? Should i just buy a new one? Trying to avoid that though.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,117
From: Crossville TN
The seal on the accelerator pump is either worn out and/or has fallen off the pump rod. That would limit the amount of raw fuel that is sprayed into the intake to start the engine.
The popping you hear is likely due to the engine eventually starting, but having the carb choke too far open (not set up properly) and being very 'lean'. Those two conditions do not work well with each other and will cause troublesome starting.
There is probably nothing fundamentally wrong with your carb; it just needs a good cleaning and a rebuild with a good quality rebuild kit, new Viton accel pump seal, new Nitrofil [or brass] float, and to be adjusted correctly.
If you want to do it yourself, buy a rebuild kit from Cliff Ruggles (check internet for info); if you don't, send an e-mail to Lars Grimsrud (V8FastCars@msn.com) and see if he can rebuild it for you. If he does it, the cost will be reasonable and the quality will be outstanding.
The popping you hear is likely due to the engine eventually starting, but having the carb choke too far open (not set up properly) and being very 'lean'. Those two conditions do not work well with each other and will cause troublesome starting.
There is probably nothing fundamentally wrong with your carb; it just needs a good cleaning and a rebuild with a good quality rebuild kit, new Viton accel pump seal, new Nitrofil [or brass] float, and to be adjusted correctly.
If you want to do it yourself, buy a rebuild kit from Cliff Ruggles (check internet for info); if you don't, send an e-mail to Lars Grimsrud (V8FastCars@msn.com) and see if he can rebuild it for you. If he does it, the cost will be reasonable and the quality will be outstanding.
Thread Starter
4th Gear
Joined: Apr 2014
Posts: 4
Likes: 0
From: Austin Texas
The seal on the accelerator pump is either worn out and/or has fallen off the pump rod. That would limit the amount of raw fuel that is sprayed into the intake to start the engine.
The popping you hear is likely due to the engine eventually starting, but having the carb choke too far open (not set up properly) and being very 'lean'. Those two conditions do not work well with each other and will cause troublesome starting.
There is probably nothing fundamentally wrong with your carb; it just needs a good cleaning and a rebuild with a good quality rebuild kit, new Viton accel pump seal, new Nitrofil [or brass] float, and to be adjusted correctly.
If you want to do it yourself, buy a rebuild kit from Cliff Ruggles (check internet for info); if you don't, send an e-mail to Lars Grimsrud (V8FastCars@msn.com) and see if he can rebuild it for you. If he does it, the cost will be reasonable and the quality will be outstanding.
The popping you hear is likely due to the engine eventually starting, but having the carb choke too far open (not set up properly) and being very 'lean'. Those two conditions do not work well with each other and will cause troublesome starting.
There is probably nothing fundamentally wrong with your carb; it just needs a good cleaning and a rebuild with a good quality rebuild kit, new Viton accel pump seal, new Nitrofil [or brass] float, and to be adjusted correctly.
If you want to do it yourself, buy a rebuild kit from Cliff Ruggles (check internet for info); if you don't, send an e-mail to Lars Grimsrud (V8FastCars@msn.com) and see if he can rebuild it for you. If he does it, the cost will be reasonable and the quality will be outstanding.
Okay I'll have to try and adjust the choke. I do remember messing with it a few years ago. If not I'll email they guy you recommended.
