WS6
09-15-2006, 04:32 PM
Well I had a qjet built for my 79 403 a long time ago now. Maybe a year. It never worked right from the get go and I couldn't get the builder to do anything about it. So on the shelf it went a my lesson was learned about that person. However I am ready to try and get it working correctly, if I can.
Supposedly the carb if off a 77 400 TA. I haven't checked the numbers and have no idea if that's true. Everything fits up correctly except for one vacuum line to the charcoal canister. I can do without that one. The carb would never idle no matter how much I adjusted the idle screws or throttle stop. It would die rather quickly after starting. I would have to run around the door to get to the engine to keep it running once started. The engine would die like it had a bad vacuum leak. I could keep the engine running steady at around 1200 I believe. I would spray ether all around the carb and it did not respond. So I ruled out vacuum leak. I must say the carb had the best throttle response I have ever seen. I loved that. I just wish I could make it idle.
So my question is, does anyone have any clue as to what I need to look for to try and figure out why the carb won't idle. The builder claimed it idled fine for him when bolted to a ZZ4 small block chevy.
My 403 is modified with higher compression heads(CR about 9.0:1) and a nice street cam with headers also.
Supposedly the carb if off a 77 400 TA. I haven't checked the numbers and have no idea if that's true. Everything fits up correctly except for one vacuum line to the charcoal canister. I can do without that one. The carb would never idle no matter how much I adjusted the idle screws or throttle stop. It would die rather quickly after starting. I would have to run around the door to get to the engine to keep it running once started. The engine would die like it had a bad vacuum leak. I could keep the engine running steady at around 1200 I believe. I would spray ether all around the carb and it did not respond. So I ruled out vacuum leak. I must say the carb had the best throttle response I have ever seen. I loved that. I just wish I could make it idle.
So my question is, does anyone have any clue as to what I need to look for to try and figure out why the carb won't idle. The builder claimed it idled fine for him when bolted to a ZZ4 small block chevy.
My 403 is modified with higher compression heads(CR about 9.0:1) and a nice street cam with headers also.