Quote:
Originally Posted by tom s
If all else fails,get the car over to Sean at SMI in Huntington Beach!There is another board member here that was having carb problems with his 69 bird and he got it straightened out.Sean does great carb work and drives a pontiac.Tom
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@sjdiesel
I am the member Tom is referring to. My Q-Jet electric choke would warm up, then move, making the carb run rich all the time. The only fix was to reset the electric choke, which I did five times since May. I finally got fed up with it and took it to Sean Murphy (SMI, Huntington Beach).
I would up going with a new Q-Jet, 800 cfm, new electric choke, the Stage 2 option.
https://www.smicarburetor.com/produc.../productID/429
Previously I was getting 7.2 mpg, now I'm getting 10.3 mpg. with spirited driving. Before I wasn't doing anything but being afraid to press the gas pedal for fear it would puke out more black smoke, fumes, etc. Final mpg report when I stop testing the kickdown acceleration of the secondaries on the I-5 freeway. LOL
I got to keep my old carb, as it had enough wrong with it (electric choke, and auto pull off bad, vacuum leaks, stripped fuel line nut, etc) that it would take longer to fix all of that then just start over, which is what I did.
My 69 Bird is a 406 / 9.75 compression / approx 325 hp engine with a TH400 transmission and 3.55:1 positraction rear end, 14" BFG 225/60-14 tires.
Sounds like what you're dealing with is what I was dealing with, so it's likely time to get it sorted out. Previously my carb had been rebuilt by two different carb shops, now I'm happy with the results.
No affiliation with Sean Murphy, no commission fees, just a happy customer.
Email me for more details if you like. sales at scumbackspeakers.com
https://www.smicarburetor.com/