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| | | Forums66 Topics128,049 Posts1,055,635 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jul 2015 Posts: 135 'Bolter | | 'Bolter Joined: Jul 2015 Posts: 135 | On my trip home cross town my 216 started hesitating horribly on the bottom end but would clean up with a good amount of throttle. I checked and found the vacuum advance not moving at all. I used a vacuum pump...nothing moved, moved the manifold hose to the advance unit and ...more nothing. So new advance unit has been ordered.
The engine would (until this happened) start on the first try with one pump of the accelerator and just a bit of choke. Now I am having to pull the choke almost all the way out and work the throttle a bit. I did have 2 backfires through the carburetor while trouble shooting this issue. Does vacuum advance have any effect on start up? Or is there more likely another issue at play possibly caused by the backfires? I have the vacuum line at the carburetor disconnected and the port is plugged.
Jackie | | |
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