Engine stumbles when I jump on it
Thread Starter
Instructor
Joined: Sep 2006
Posts: 159
Likes: 1
From: Blaine Minnesota
Engine stumbles when I jump on it
When I push the throttle to the floor from a dead stop it takes a while for it to get up and go. It stumbles real bad and if I feather the throttle it will eventually go. It also stumbles when I try floor it while driving at any speed. I am guessing the carb needs a rebuild. It starts and runs good. My question is should I try to rebuild it? Or have it rebuilt? Or buy a different new carb? If so what is recommended for a relatively stock 350 automatic? Thanks
Le Mans Master
Joined: Dec 2006
Posts: 8,837
Likes: 1,028
When I push the throttle to the floor from a dead stop it takes a while for it to get up and go. It stumbles real bad and if I feather the throttle it will eventually go. It also stumbles when I try floor it while driving at any speed. I am guessing the carb needs a rebuild. It starts and runs good. My question is should I try to rebuild it? Or have it rebuilt? Or buy a different new carb? If so what is recommended for a relatively stock 350 automatic? Thanks
I suggest rebuilding your q-jet by Lars .
Tech Contributor
Joined: Aug 1999
Posts: 14,379
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
Check and set your secondary airvalve spring windup to 3/4 turn. Verify your choke pulloff is hooked up and functional. And above all else, make sure you have 36 degrees total timing and make sure your vacuum advance is operational.
