Hesitation when pedal punched...Help
Thread Starter
Intermediate
Joined: Mar 2010
Posts: 34
Likes: 0
Hesitation when pedal punched...Help
I am the new owner of a '73 BB and I have followed the timing sticky. I am finding that when I punch the gas I get about a 2 sec hesitation before then it takes off. What is causing this? Initial timing is good at 120 and all in at 3000RPM at 360.
Burning Brakes
Joined: Mar 1999
Posts: 1,047
Likes: 3
From: CA
Not sure if you have a q-jet, or when the hesitation occurs, but one possibility is the accelerator pump.
Melting Slicks
Joined: Oct 2002
Posts: 2,317
Likes: 111
From: St Louis MO
Most likely, the secondary air valve tension is too low. As suggested above, check the pump shot, too. Beyond that, read Lars stickies on Q-jet carbs - there should be no hesitation at all!
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Most likely a worn out seal on the accelerator pump in your carb. Other possibilities are that the linkage on your accel. pump is placed in the wrong hole in the pump actuator level or that the spring adjustment on the secondary air valve is set very 'weak' [allowing the air valve to open way too early and cause a bog].
