helpot a carb problem

by01rf · 12-09-2001, 09:07 AM

just got an 85 gt and its my first carbed 5.0. the problem is that it has a dead spot in the 130 to 1800 rpm range. also when im cusin in second gear and flor it at about 3000 it doesnt do anything for a second or two and then it chirps the tires and takes off. any help would be good. the caris stock except offroad h-pipe and flowmsters.

PKRWUD · 12-09-2001, 10:44 AM

You've got a problem with the accelerator pump. Start by inspecting it for leaks, then make sure it's adjusted properly. You want it set up so that it squirts at the very slightest touch, yet isn't bottomed out before you reach WOT. What color accelerator pump cam does it have, and which hole is the screw in?

Dark Knight · 12-09-2001, 01:52 PM

stock carb?

srv1 · 12-09-2001, 02:44 PM

is it vacuum or mechanical secondaries? check that also to see if it is working properly

Dark Knight · 12-09-2001, 08:50 PM

also might have some dirt in one of the squirters...

LX5liter · 12-10-2001, 12:15 PM

I agree with PKRWUD. Someone may have changed the accelerator pump cam on you. When you get it right it should not hesitate at all.
An excellent book on the Holleys is;

Holley Rebuilding & Modifying
by Jeff Williams

It is an S-A Design book and it describes the Holley very well. It also has a "power tuning" section which is great!

12-09-2001, 09:07 AM	#1
by01rf Registered Member Join Date: Dec 2001 Location: binghamton ny Posts: 6	helpot a carb problem just got an 85 gt and its my first carbed 5.0. the problem is that it has a dead spot in the 130 to 1800 rpm range. also when im cusin in second gear and flor it at about 3000 it doesnt do anything for a second or two and then it chirps the tires and takes off. any help would be good. the caris stock except offroad h-pipe and flowmsters.

12-09-2001, 10:44 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You've got a problem with the accelerator pump. Start by inspecting it for leaks, then make sure it's adjusted properly. You want it set up so that it squirts at the very slightest touch, yet isn't bottomed out before you reach WOT. What color accelerator pump cam does it have, and which hole is the screw in? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

12-09-2001, 01:52 PM	#3
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	stock carb? __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

12-09-2001, 02:44 PM	#4
srv1 Get down..... Join Date: Apr 2001 Location: Room 103 Posts: 2,095	is it vacuum or mechanical secondaries? check that also to see if it is working properly __________________ Cobra brakes are on! Finally..... ------------------------------------------------

12-09-2001, 08:50 PM	#5
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	also might have some dirt in one of the squirters... __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

12-10-2001, 12:15 PM	#6
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	I agree with PKRWUD. Someone may have changed the accelerator pump cam on you. When you get it right it should not hesitate at all. An excellent book on the Holleys is; Holley Rebuilding & Modifying by Jeff Williams It is an S-A Design book and it describes the Holley very well. It also has a "power tuning" section which is great! __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

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