Need help finding my (grimlin)

Watson Racing · 05-12-2009, 10:12 PM

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

THANK'S TO ALL WHO POSTED I FOUND THE BOTTOM OF THE INTAKE GASKET WAS LEAKING BUT I DID USE ALOT OF EVERYBODY'S IDEAS AND MY CAR IS RUNNING BETTER THAN IT EVER HAS.

Thank's for all you help

Chris Williams · 05-12-2009, 11:10 PM

Had a nearly identical problem this past weekend (although on a Dominator). Did three things, and it went away -- unfortunately not sure which one was the solution. What I did: a) put in somewhat bigger idle air bleeds, b) put in bigger accelerator pump squirters, and c) asked the driver to roll into it rather than stomp it. Problem solved.

Barney B · 05-13-2009, 03:50 AM

Quote:

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 · 05-13-2009, 08:34 AM

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 · 05-13-2009, 08:46 AM

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 · 05-13-2009, 01:10 PM

I go with bigger squirters

voltdr · 05-19-2009, 04:58 PM

Bigger squirters, ( mine are .055 in my dragster) and make sure the engine is warmed up properly. It is a bigger issue also if the weather is cooler outside. The problem will show up more when it gets cool at night vs. the daytime, even at the same race.

EricArrow · 05-20-2009, 02:33 PM

Quote:

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 · 05-20-2009, 03:11 PM

Clean Fuel Filter ?

Mark Schmidt · 05-20-2009, 04:59 PM

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!

05-12-2009, 10:12 PM	#1
Watson Racing Junior Member Join Date: Jan 2007 Location: OHIO Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Need help finding my (grimlin) 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 THANK'S TO ALL WHO POSTED I FOUND THE BOTTOM OF THE INTAKE GASKET WAS LEAKING BUT I DID USE ALOT OF EVERYBODY'S IDEAS AND MY CAR IS RUNNING BETTER THAN IT EVER HAS. Thank's for all you help Last edited by Watson Racing; 05-28-2009 at 12:29 PM.

05-12-2009, 11:10 PM	#2
Chris Williams Member Join Date: Mar 2009 Location: Woodinville, WA Posts: 401 Likes: 0 Liked 0 Times in 0 Posts	Re: Need help finding my (grimlin) Had a nearly identical problem this past weekend (although on a Dominator). Did three things, and it went away -- unfortunately not sure which one was the solution. What I did: a) put in somewhat bigger idle air bleeds, b) put in bigger accelerator pump squirters, and c) asked the driver to roll into it rather than stomp it. Problem solved. __________________ Chris Williams 6304 SC, TD, ET

05-13-2009, 08:34 AM	#4
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: Need help finding my (grimlin) 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 __________________ Joe Buchanan SS/BX 3117

05-13-2009, 08:46 AM	#5
sean graham Junior Member Join Date: Apr 2007 Location: columbus ohio Posts: 44 Likes: 0 Liked 0 Times in 0 Posts	Re: Need help finding my (grimlin) 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

05-13-2009, 01:10 PM	#6
H.A.A.C. Racing Member Join Date: Aug 2007 Posts: 320 Likes: 0 Liked 0 Times in 0 Posts	Re: Need help finding my (grimlin) I go with bigger squirters

05-19-2009, 04:58 PM	#7
voltdr Senior Member Join Date: Jan 2008 Location: Texas Posts: 706 Likes: 77 Liked 100 Times in 51 Posts	Re: Need help finding my (grimlin) Bigger squirters, ( mine are .055 in my dragster) and make sure the engine is warmed up properly. It is a bigger issue also if the weather is cooler outside. The problem will show up more when it gets cool at night vs. the daytime, even at the same race.

05-20-2009, 03:11 PM	#9
Bryan Gillespie Banned Join Date: Dec 2006 Location: Maryland Posts: 456 Likes: 0 Liked 0 Times in 0 Posts	Re: Need help finding my (grimlin) Clean Fuel Filter ?

05-20-2009, 04:59 PM	#10
Mark Schmidt Member Join Date: Sep 2007 Posts: 273 Likes: 0 Liked 0 Times in 0 Posts	Re: Need help finding my (grimlin) 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! __________________ MDS Motorsports