Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - back fire in the carb
View Single Post
  #3 (permalink)  
Old 02-12-2010, 02:04 PM
T-bucket23's Avatar
T-bucket23 T-bucket23 is offline Moderator
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 58
Posts: 5,943
Wiki Edits: 26

Thanks: 22
Thanked 275 Times in 230 Posts
Originally Posted by P.H. 88
i have a 81 c-10 with a non stock 350 small it had points i converted it 2 H.E.I in hopes of getting rid of the back fire . i put the balancer at 0 did the finger blow out on #1 cyl with the dis cap off rotter pointing at number one firing order checked and er checked. in the begging it back fired only with a load on now starts up and back fires. help
What is the timing set at. Usually a backfire through the carb is either timing, lean mixture or valves that are to tight. You may also want to be sure the HEI is being fed at least 12 volts. Shoud be the same as battery voltage. Point system often has a resistor to cut the voltage down.
Also check the firing order, pay close attention to 5 and 7 as they are next to each other on both ends and are easy to mix up
Artificial Intelligence is no match for Natural Stupidity

Reply With Quote