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Click on image for the lowdown. 
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| | | Forums66 Topics128,065 Posts1,055,868 Members48,428 | | 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
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#95167 03/21/2006 2:04 PM | Joined: May 2005 Posts: 314 Shop Shark | | Shop Shark Joined: May 2005 Posts: 314 | It requires four things to run
1) fuel
2) compression
3) spark
4) the first three must be timed properly
Usually a backfire means something is out of time (firing with a valve open) or too richly fueled. | | |
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