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#1 |
Registered User
![]() Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Need Carb Help in No. KY
OK I'm hoisting the white flag!
Any forum members in the Northern KY area who understand and appreciates the Rochester Quadrajet or knows of anyone who does who would be willing to help out a total idiot please let me know, I could really use some hands on help. For whatever reason, I can't get this damn thing to drop off high idle and I'm sure it needs to be adjusted. I've read as many posts and watched as many videos as I can find and I think I'm more lost now than I was before. Besides, I learn better hands on. Thanks in advance.....Rick
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 ![]() 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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#2 |
Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Need Carb Help in No. KY
Is this when you first start it cold? Or after it has warmed up?
Does the throttle lever go all the way to the adjustable idle stop screw on drivers side? If it doesn't,then the choke idle speed screw is too far in causing a too high speed.This screw is on the side of the carb on the passenger side down low at the end of the lower throttle plate. Check this adjustment and see if it helps. Mike. ![]() |
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#3 |
Registered User
![]() Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Re: Need Carb Help in No. KY
This is from a cold start. Truck started fine....after I replaced the starter for the third time, but I had to pump the gas a couple of times to get her to fire. Yesterday I drove it out to a muffler shop to get pipes put on it. The drive was about 10-12 miles and by the end it was still idling at 1500rpm. Never kicked down. I've been battling the choke which wasn't installed correctly from the re-builder and I'm sure it needs some fine tuning so that may be part of my starting problem but this thing has never wanted to come off the high step. I have been able to manually release it and get it to idle but that doesn't do me any good driving. I'll have to wait until I get it back from the muffler shop to try your suggestions.
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 ![]() 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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#4 |
Registered User
Join Date: Mar 2013
Location: Campbellsville, KY
Posts: 888
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Re: Need Carb Help in No. KY
Where are you at, exactly?
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Alex V. ------ 1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs. 1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue. |
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#5 |
Registered User
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
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Re: Need Carb Help in No. KY
I would find one of them old school small garages with a mechanic over 40,Or anyone that drag races or circle track should be able to tune the carb for you.
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#6 | |
Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Need Carb Help in No. KY
Quote:
When warmed up,you should be able to "goose" the throttle to make it idle down. P.S.-I'm over 40! ![]() Mike. ![]() |
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#7 | |
Registered User
![]() Join Date: May 2007
Location: Erlanger, KY
Posts: 99
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Re: Need Carb Help in No. KY
Quote:
So am I! It's just been 25 years since I last tinkered with one. Alex V. I'm in Erlanger. I asked the guys at the muffler shop to take a look at it. If they don't come up with anything, I'll ask a buddy of mine who has a bunch of dirt track buddies if maybe he could ask them for help. I've tried goosing the throttle but it does absolutely nothing. Once it's warmed up I can take a screwdriver and bump it down off the high throttle but for whatever reason it won't do it itself. I've got a quadrajet rebuild book coming, that might help too.
__________________
1980 GMC Sierra Grande C15 1987-1992 1988 Chevy Silverado K1500 1992-1996 1978 Chevy K5 Blazer 1998-2002 1998 GMC Sierra SL K2500 2002-2010 ![]() 2007 GMC Sierra Classic 2500HD LBZ 2010-Present 1978 Chevy Silverado K20 2016-Present |
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