Holley carb idle problem
Thread Starter
Advanced
Joined: Jun 2012
Posts: 71
Likes: 0
From: Suffolk,VA
Holley carb idle problem
Today I took the car on its first long drive since the engine was overhauled. My 1969 427 390 hp has been running good since the overhaul. I have put around 100 miles on the engine. The problem i notice is that when I have the air conditioning on and stop at the stop light the engine will not idle and then it floods out and dies. I have to hold the gas pedal to the floor and crank the engine to get it to start. Maybe a simple adjustment of the floats? a/c compressor belt too tight? The holley 4150 double pumper was rebuilt last year and was operating good before the engine overhaul.
Race Director
Joined: May 2006
Posts: 18,710
Likes: 2,574
Automatic or manual transmission? What is the idle speed with A/C off and what is it with A/C on? Assuming the idle is correctly set, remove the front sight plug with the engine idling and observse the float level, it should be just even with the bottom of the hole. Adjust if necessary. Then do the same with the rear.
Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Today I took the car on its first long drive since the engine was overhauled. My 1969 427 390 hp has been running good since the overhaul. I have put around 100 miles on the engine. The problem i notice is that when I have the air conditioning on and stop at the stop light the engine will not idle and then it floods out and dies. I have to hold the gas pedal to the floor and crank the engine to get it to start. Maybe a simple adjustment of the floats? a/c compressor belt too tight? The holley 4150 double pumper was rebuilt last year and was operating good before the engine overhaul.
