Need help finding my (grimlin)

[Barney B]

Originally Posted by Watson Racing

I have a super street car that runs mid 10s car has been running great at the start of the season all the sudden i have a problem. When i jab the pedal to the floor it falls on its nose then picks right back up if i push the pedal down slow it is fine I have taken the carb apart and cleaned everything even put new accelerator pumps in and new power valve in even cleaned pump nozzles it is a quick fuel 850 check timing check valves even checked msd box everything checks ok also put in new plugs drained all fuel and changed fuel filter even changed fuel any one have any help

Make sure one of you idle air bleads are not plugged. It don't take much.
BB

[buzzinhalfdozen]

Quick way to check for plugged idle air bleed run the adj. screw in if no change in idle spped someting is restricting the circuit. Had this on a SS car at indy took carb apart to inspect, cleaned out never did see anything but after reass. carb problem was gone. Joe

[sean graham]

make sure your idle air screws are about 1 1/2 turns out from fully closed, and then put a bigger front squirter in the thing, you should be ok then

[H.A.A.C. Racing]

I go with bigger squirters

[EricArrow]

Originally Posted by Barney B

Make sure one of you idle air bleads are not plugged. It don't take much.
BB

I agree...

[Bryan Gillespie]

Clean Fuel Filter ?

[Mark Schmidt]

I'm assuming you run on the stop, that said I would suggest 3 things

1. Lose the power valve and re-jet accordingly
2. Larger squirters
3. Roll into the throttle (if for no other reason..consistency)

Just my .02 cen ts...good luck!

[buzzinhalfdozen]

Probably the biggest problem I've seen on alot of cars is guys seem to run the idle very lean, the manifold MUST be full of fuel vapors or you will certainly have a stumble on quick throttle application. I'm not sure you can put a big enough squirter in it to overcome this issue. Look at it this way when you jab the throttle fuel comes out the squirters at the top of the carb, how long do you think it takes that fuel to reach the cyls? It's not instant hence your hesitation, you need that manifold rich with fuel to have the necc. responce to throttle angle change. Joe

[Adger Smith]

I have had customers that had problems similar. It happens after the car/boat sits without much use. Check to see if the needles below the squirters are stuck. More common a problem with alky & race fuel than with pump gas.