car stumbles in the air!
 

We are having issues with the car as soon as you release the trans brake and it leaves the line and starts in the air it hesitates and acts like it is out of fuel. We have change 3 different carbs and regulator, fuel pump, msd box, we have looked at rotor button, distributor cap, and when car lands to runs fine and comes clean out of water boxs. any input would be helpful. thanks

Re: car stumbles in the air!
 

What car, engine, carb?

Re: car stumbles in the air!
 

If it runs fine everywhere except "x", then "x" is the only issue.
Running out of fuel either due to pressure or just's uncovered or sloshing fuel where it's not supposed to be. Maybe a wedge plate will work? But you have to look at the whole picture.

Re: car stumbles in the air!
 

The car is a camaro, engine is a 350 and carb is a quadrajet. As far as Jeff's reply I don't understand what he's saying?? If the fuel pressure is off, then what should it be?? :confused: it has been 7lbs. When it comes out of the water box it has no hesitation, no stumble, it's just when u stage and go up on rpm's and release the trans brake button it hesitates and when it comes down and planes out, it runs great!!:) Do you think it could be a fuel pressure issue?? Thanks for any response...

Re: car stumbles in the air!
 

Jones,

judging by your first post you have checked the basics for a bad part. So, it is reasonable to look at other items. [and do not mean any disrespect, just beginning the brainstorming process] begin looking at the entire package in a different light. That is to say, go back and look carefully at every small thing. Look at every wire, every ground, every terminal connection, etc.

One idea is to have someone else drive the car while you look and listen, might give a different idea of what is happening.

Re: car stumbles in the air!
 

Fuel pressure or bad ground that only happens when you do a wheelie would be where I would start.

Re: car stumbles in the air!
 

And just to add the car is still in low gear. and I did have the trans brake button break on me and the wires touch. Do you think that the trans brake button by touching could have shorted sum thing out?:confused: Thanks for the help.. I'm stumped.. it's in low gear in the air.

Re: car stumbles in the air!
 

Hmm, sounds familiar. Re-check all your grounds. That was my problem.

Re: car stumbles in the air!
 

Thanks Ed.

Re: car stumbles in the air!
 

Just to be sure its not a fuel issue, put the .149 ( bigger) needle and seat in the carb at the same float height as the previous ones. We have had that same issue before. If it gets alot better or cures the problem, you have a supply problem