Starting line hesitation
 

I have a 80 Camaro 350 H/SA that I am having a problem
with. When the car leaves it goes 2 ft and it sounds like the engine
cut out for a tenth of a second for the last 6 runs. The 60ft times
are exactly a tenth slower the last 6 runs, at 2 different track But the
mph is the same as before this problem.
I have a 2 step and I tried with it hook up and not hook up, no difference
ANY HELP APPRECIATED
BOB KELLER

Re: Starting line hesitation
 

More info might help. What RPM do you leave the line at? What is the fuel psi before you stage ? What is the fuel psi when it cuts out? Does it recover Quick or slowly rev back up. Have you had the top lid off the q-jet to look inside? Possible fuel psi regulator problem. Or might be ignition miss

Re: Starting line hesitation
 

Possible fuel spillover on launch?

Re: Starting line hesitation
 

Which carburetor? Qjet or Holley?

Re: Starting line hesitation
 

It's either fuel spill over, bad choke pull-off, or secondary door to loose.

Re: Starting line hesitation
 

If it is a Q-Jet could be spill over from too high of a fuel pressure setting.

Re: Starting line hesitation
 

Thank you all for your come backs. The car has a 3700 RPM
chip in the 2 Step. Fuel pressure on line is 6 lb.The engine
recovers quickly. The last run it did it twice one after another.
This is a Danny Ashley Qjet built in 2012 I don't want make any
adjustment to the carb. The carb work great before.
. I removed the top to install plugs in carb because I
am now running a two step.I removed the plugs and used the foot
brake, same thing. I also installed a lifter valley baffle could this
ad to the problem
Thanks for your time
Bob Keller

Re: Starting line hesitation
 

Since Danny built it, I am ruling out the air door to loose. I would try a new choke pull-off, I have had several of them go bad and cause the same issue. Pull the vacum hose off and push the arm in, with the arm pushed in hold your finger over the vacum port. Let go your finger off the vacum port and make sure the arm comes out smoothly. If it starts coming out and then hangs up for a second it's bad.

Re: Starting line hesitation
 

Bob,
Is the brass plate for metering rods in place? If that slips forward when changing metering rods it will bog with spill-over. Also check choke pull-off.

rod

Re: Starting line hesitation
 

That is the problem which I had...
I did not know that it was there and, when I pulled the secondary rods to measure them to resolve a rich condition, it slipped forward.
I could not understand how a car, which ran fabulously just two weeks before, could now stall after my burnout and hesitate so bad off the line.
As it was my first experience with a Danny Ashley carb, I did not find it until I pulled the top off.