Any insight to this small problem would be greatly appreciated. I have a Rochester four barrel Q-jet currently on my chev blazer, 350 sb,
4x4. It is a great carb. Performs well, provides relatively good mpg. Chokes up on cold mornings. Overall, there is notning wrong with this carb. Except one minor annoying detail. After an appropiate period of time for proper warm up, the choke kicks down appropriately. But when I wait at a stop light it seems to take 30 or more seconds for the idle to return to a normal point, somewhere about 750 rpm. Seems the engine idle hovers around 1000-1100 for maybe even a minute. Then begins to slowly drop down to the normal range. I have tried adjusting everything external on the carb with out being able to correct this problem. I have adjusted my timing multiple times. I have adjusted the idle-air mixture multiple times. Like I said other than this minor inconvienience, this is a great carb. Any suggestions for what may be going on and how to potentially correct this would be greatly appreciated. Thanks.- posted
20 years ago