Throttle response under load

[FastbackJon]

Just wondering what would cause an engine to run good at idle in the driveway, with good throttle response, but then bog out when accelerating under load like up a hill or onto the freeway?

[tan top]

if its not timing related  ,  could be  blocked or partially fuel filter  , had  that happen one time ! exact  same symptoms 

[Runner]

not enough pump shot, or wrong squirter size.

[elacruze]

Just wondering what would cause an engine to run good at idle in the driveway, with good throttle response, but then bog out when accelerating under load like up a hill or onto the freeway?

Most likely it's too lean. What's your engine/carb setup? Is it weak everywhere or just at certain throttle positions or RPMs? Does it backfire through the carb? Need more info.

[tan top]

not enough pump shot, or wrong squirter size.

yeah  , sounds like it ,



opps  i assumed in my first post , your motor had been previously running good

[68chargerboy]

i had this probem changed from a 770 to a 650 carb and olved the issue, now she screams!