jlorini Posted February 28, 2010 Report Share Posted February 28, 2010 I recently had old distributor replaced with electronic pointless distributor on my R-1. Plugs and wires were also replaced. Engine runs beautifully EXCEPT I get backfiring (popping sound) between 2,500-3,000 rpms on decelleration/coasting from that rpm range. This was NOT present with old distributor. Any thoughts on what is wrong? Link to comment Share on other sites More sharing options...
new2avantis Posted February 28, 2010 Report Share Posted February 28, 2010 (edited) coming off of hard acceleration, or daily driving? what type of dist? whats the timing set to? can be lots of different things. was the system built for a studebaker, or retrofit from spare parts? plugs the right kind/size gap? no wires crossed? Edited February 28, 2010 by new2avantis Link to comment Share on other sites More sharing options...
GAWen Posted March 1, 2010 Report Share Posted March 1, 2010 Personally I love that popping sound, tells me that I have really tuned my car for max performance. But, it is a real indication of a over rich fuel/air mixture at that RPM range. George, RQB 1600 Link to comment Share on other sites More sharing options...
ernier Posted March 2, 2010 Report Share Posted March 2, 2010 As an experiment try disconnecting the vacuum advance and plugging the line. If it improves you may have a sticking breaker plate. The vacuum advance is pulling hard at that rpm range while cruising and when you let off the gas the plate should return as vacuum diminishes. Just a thought and easy to try. ErnieR I recently had old distributor replaced with electronic pointless distributor on my R-1. Plugs and wires were also replaced. Engine runs beautifully EXCEPT I get backfiring (popping sound) between 2,500-3,000 rpms on decelleration/coasting from that rpm range. This was NOT present with old distributor. Any thoughts on what is wrong? Link to comment Share on other sites More sharing options...
ernier Posted March 4, 2010 Report Share Posted March 4, 2010 I just thought of something else...if you have a choice of ported and non-ported vacuum connection on your carb for the advance are you connected to the ported side ( passenger ) side of carb? If you have the original carb ignore this post ErnieR Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now