Hesitation problem
Thread Starter
|
New User
Joined: Oct 2004
Posts: 8
Likes: 0
Hesitation problem
My ranger has a 302HO out of a 1969 Mustang. Here is what is all on it. Hedman shorty headers, Edelbrock Performer RPM Intake, Holly 750cfm double pumper, and 14"x3" K&N round filter with Summit Racing flow through air lid. At any time I give it any gas there is a hesitation. If the throttle is in a steady position there is no hesitation. Any help would be great. Thanks.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Well I'm not familar with your particular carb. but it sounds like a misadjusted accelerator pump arm, or a worn pump, both of which are giving a lean squirt of fuel, when you crack the throttle.
Most carbs. have an adjustment notch on the accelerator pump arm, that will allow you adjust the pump arm travel for a longer, or shorter stroke, to give more or less of a fuel squirt, when you open the throttle.
If it's always had the hesitation, I'd guess it was set with the stroke too short, thus giving a lean squirt.
If it slowly began over time I'd guess the accelerator pump is getting weak from wear & giving a weak squirt of fuel.
So in the short run, you may be able to get around it, by adjusting the pump arm to get more/longer piston travel, thus more fuel squirted on each throttle opening.
In the long run, you'll likely have to rebuild the carbs accelerator pump.
If you don't have a setup or repair manual for this carb, try your local library in the automotive section, bet you'll find something there on carbs with pictures that'll help you locate & adjust the accelerator pump arm, or overhaul the pump if needed. pawpaw
Most carbs. have an adjustment notch on the accelerator pump arm, that will allow you adjust the pump arm travel for a longer, or shorter stroke, to give more or less of a fuel squirt, when you open the throttle.
If it's always had the hesitation, I'd guess it was set with the stroke too short, thus giving a lean squirt.
If it slowly began over time I'd guess the accelerator pump is getting weak from wear & giving a weak squirt of fuel.
So in the short run, you may be able to get around it, by adjusting the pump arm to get more/longer piston travel, thus more fuel squirted on each throttle opening.
In the long run, you'll likely have to rebuild the carbs accelerator pump.
If you don't have a setup or repair manual for this carb, try your local library in the automotive section, bet you'll find something there on carbs with pictures that'll help you locate & adjust the accelerator pump arm, or overhaul the pump if needed. pawpaw
Thread
Thread Starter
Forum
Replies
Last Post
