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02-21-2013, 04:28 PM
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#1 |
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Registered User
Join Date: Nov 2010
Location: WINSTON SALEM, NC
Posts: 99
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bad throttle response
my '72 GMC TRUCK has very bad throttle response from dead stand still...just wondering if this could be because of bad remanufactured Quadrajet, or bad detent cable, or what...
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02-21-2013, 04:35 PM
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#2 |
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Cluster King
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Re: bad throttle response
How did it run or respond before the reman Q-Jet? Can you look into the top of the carb and see it squirt fuel when you open the throttle?
When you say detent cable do you mean the cable from the carb to the trans that controls down shifts? That would not likely have anything to do with performance from a dead stand still. |
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02-21-2013, 05:36 PM
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#3 |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: bad throttle response
look for stuck choke, faulty or weak accelerator pump, stuck secondaries, or linkage that doesn't open the throttle blades.
Any black smoke out the back or popping when you hit the gas?
__________________
1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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02-21-2013, 05:56 PM
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#4 |
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the boat guy
Join Date: Jul 2007
Location: springfield mo
Posts: 2,339
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Re: bad throttle response
Old accelerator pump rubber doesn't like ethanol.
Posted via Mobile Device
__________________
67, swb, fleet, tach, throttle, 5.3, 4l60e, 3.73's, fuel cell, 5 lug, p.d.b., 4-6 drop. great little truck 66, stevens drag/ski 18' silouette, 350, 2.02 doublehump heads. comp extreme marine 278 cam, vette 7 fin valve covers, old polished edelbrock intake, velvetdrive, casale v-drive, adj cavitation plate. 28, model a rpu project, |
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02-21-2013, 05:57 PM
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#5 |
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Registered User
Join Date: Nov 2010
Location: WINSTON SALEM, NC
Posts: 99
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Re: bad throttle response
ran fine before reman Quad...don't see any fuel squirt when I open throttle...yes...detent I mentioned was to tranns...choke seems to be ok...secondaries, I don't think have opened up since I put carb on...no black, or any other color smoke out the back...or popping
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02-21-2013, 06:01 PM
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#6 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: bad throttle response
ran fine and you changed it why???
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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02-21-2013, 06:05 PM
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#7 |
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Registered User
Join Date: Nov 2010
Location: WINSTON SALEM, NC
Posts: 99
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Re: bad throttle response
changed it because it was leaking gas all around it
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02-21-2013, 07:07 PM
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#8 |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: bad throttle response
If you don't see gas squirting out when you activate the throttle, acclerator pump is not working right. Could be they installed it improperly or it could be float is maladjusted.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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02-22-2013, 07:03 AM
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#9 |
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Registered User
Join Date: Nov 2010
Location: WINSTON SALEM, NC
Posts: 99
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Re: bad throttle response
Thanks to 'ALL'...looks like I'm getting another chance to rebuild a Quadrajet for the 2nd time...
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