Backfire through Carburetor
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From: Arizona
Backfire through Carburetor
Hello All, new to the forum and have read alot of good posts. I have a 66 Ford F100 with a 390 V8 engine from a '68. I have a new edelbrock carburetor 650 scfm and a custom exhaust.
When I drive it around at normal speeds the exhaust has some backfire. I am assuming I might have and exhaust leak somewhere. but more than likely the exhaust and intake backfiring are related.
When I really step on it, I get backfire through the carburetor. I had an engine compression check and the results were good. Nothing wrong with the valves. my vacuum is a little lower than normal I run about 15". I have changed the vacuum lines but it also has not improved. I have been told my truck does run lean so maybe I need to adjust the secondaries on the carburetor to get more fuel in the engine when I really accelerate. Any comments or suggestions?
I am fairly new to these trucks and I would consider myself a novice mechanic. But I can get things done when I have a plan. Just want to get some comments before I start messing with it. She runs okay now but If I could fix the backfiring she would run like a champ. Thank you.
When I drive it around at normal speeds the exhaust has some backfire. I am assuming I might have and exhaust leak somewhere. but more than likely the exhaust and intake backfiring are related.
When I really step on it, I get backfire through the carburetor. I had an engine compression check and the results were good. Nothing wrong with the valves. my vacuum is a little lower than normal I run about 15". I have changed the vacuum lines but it also has not improved. I have been told my truck does run lean so maybe I need to adjust the secondaries on the carburetor to get more fuel in the engine when I really accelerate. Any comments or suggestions?
I am fairly new to these trucks and I would consider myself a novice mechanic. But I can get things done when I have a plan. Just want to get some comments before I start messing with it. She runs okay now but If I could fix the backfiring she would run like a champ. Thank you.
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