Hot Rod Forum banner
1 - 2 of 2 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter · #1 ·
What cause this to do that? I have went through 4 different carbs and no change. We recently put a new cam in and broke it in etc, and it will not idle correctly i cant seem to find the issue can anyone help me with this problem?
 

·
489 Lemans
Joined
·
2,139 Posts
poor idle

dont know if this will help but i had a similar problem using a holley duel pumper. the power valves were open at idle because of poor vacuum. when the rpm picked up the idle picked up and the power valves closed and the motor wouldn't run. a cam with a long duration such as a roller has poor vacuum. so it needs a about 18 degrees of initial timing. putting the vacuum advance hose on is advancing the timing where it wants to be. so try this. set initial to 18 degrees. set idle to 900 rpm. put advance hose on and see if it stays at 900.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top