Sputtering off idle FIXED! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Cal69Chevy · 04-03-2002, 04:53 PM

Well I finally decided to rebuild my Qjet myself (I've never built a carb before) in hopes it would fix my off idle sputtering.

IT DID! and it wasn't that difficult to do either. Unfortunately the carb kit I bought didn't have instructions so I was at a slight disadvantage...but I took a good look at things before I removed them and it really wasn't that difficult.

Cost me $12 and some carb cleaner. The rebuild shop wanted $150 to rebuild it. It took about 2 hours...not a bad per hour savings!

Thanks to everyone that offered advice and information.

Ken

raychevy · 04-03-2002, 07:12 PM

Im fixing on doing the same thing. Ive done mowers and go karts but never a truck carb.

Cal69Chevy · 04-03-2002, 08:27 PM

Ray...do you have a Quadrajet? If so look on the right side of the carb for the id numbers...call up your local Autozone or the like and get their kit...the only thing that was difficult was getting the air horn gasket over the power piston assembly...if you have a digital camera or a video camera just document it as you go...also here's a great website with an exploded view of the Qjet with names (that's how I knew what a air horn gasket and power piston are).
http://www.carbs.net/quadrajet2.asp

Good luck!

Ken

O'l Buck · 04-04-2002, 03:20 AM

they're not bad to rebuild, my problem always seems to be getting the secondary metring rods to go into the jets, it's either a 1 shot deal or I'm there for 30 minutes and end up taking off the lift arm and putting them in 1 at a time, cantankarous little devils they are!!

------------------
'72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

67 Cutlass convertible
330, 3spd stick

90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

don t. - 72gmc · 04-04-2002, 01:22 PM

Im having the same problem w/mine. I saw the carb site cal69chevy posted a week back (thanks cal!!). Figured what the 7734. I've rebuilt 2 bbls b/4 but not a 4bbl. Its clean, started last night to put it back 2gether. Hope to have it done/running Friday p.m. And yes, took lots of digital pixs. The rebuild kit is ok but the exploded diagram aint to good and I have CRS. Thank god for the digital pixs.

Cal69Chevy · 04-04-2002, 05:52 PM

Ok...I must be dense (second post this week with that intro...not a good sign)..but does 7734 mean and what is CRS?

don t. - 72gmc · 04-04-2002, 07:18 PM

crs - cant remember ship
7734 - its an old timer way of saying where the devil lives. Write it on paper and hold it up to a mirror or something like that.
I know, little things amuse little minds and god knows i've got a little mind.
And thanks again for providing that carb web site. Gave me the gumption to rebuild mine.

04-03-2002, 04:53 PM	#1
Cal69Chevy Registered User Join Date: Nov 2001 Location: SoCal Posts: 136	Sputtering off idle FIXED! Well I finally decided to rebuild my Qjet myself (I've never built a carb before) in hopes it would fix my off idle sputtering. IT DID! and it wasn't that difficult to do either. Unfortunately the carb kit I bought didn't have instructions so I was at a slight disadvantage...but I took a good look at things before I removed them and it really wasn't that difficult. Cost me $12 and some carb cleaner. The rebuild shop wanted $150 to rebuild it. It took about 2 hours...not a bad per hour savings! Thanks to everyone that offered advice and information. Ken __________________ '69 Chevy, 4X4-SB 350 TBI-TH350 Trans-205 Transfer Case-Dana 44 Front-14 Bolt Rear-Front Disc Brakes-Factory A/C-P/S Ken's '69 Page

04-03-2002, 08:27 PM	#3
Cal69Chevy Registered User Join Date: Nov 2001 Location: SoCal Posts: 136	Ray...do you have a Quadrajet? If so look on the right side of the carb for the id numbers...call up your local Autozone or the like and get their kit...the only thing that was difficult was getting the air horn gasket over the power piston assembly...if you have a digital camera or a video camera just document it as you go...also here's a great website with an exploded view of the Qjet with names (that's how I knew what a air horn gasket and power piston are). http://www.carbs.net/quadrajet2.asp Good luck! Ken __________________ '69 Chevy, 4X4-SB 350 TBI-TH350 Trans-205 Transfer Case-Dana 44 Front-14 Bolt Rear-Front Disc Brakes-Factory A/C-P/S Ken's '69 Page

04-04-2002, 03:20 AM	#4
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	they're not bad to rebuild, my problem always seems to be getting the secondary metring rods to go into the jets, it's either a 1 shot deal or I'm there for 30 minutes and end up taking off the lift arm and putting them in 1 at a time, cantankarous little devils they are!! ------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

04-04-2002, 05:52 PM	#6
Cal69Chevy Registered User Join Date: Nov 2001 Location: SoCal Posts: 136	Ok...I must be dense (second post this week with that intro...not a good sign)..but does 7734 mean and what is CRS? __________________ '69 Chevy, 4X4-SB 350 TBI-TH350 Trans-205 Transfer Case-Dana 44 Front-14 Bolt Rear-Front Disc Brakes-Factory A/C-P/S Ken's '69 Page

04-03-2002, 07:12 PM	#2
raychevy Registered User Join Date: Jul 2000 Location: Evansville, Indiana USA Posts: 485	Im fixing on doing the same thing. Ive done mowers and go karts but never a truck carb.

04-04-2002, 01:22 PM	#5
don t. - 72gmc Registered User Join Date: Dec 2001 Location: harvard, il. USA Posts: 394	Im having the same problem w/mine. I saw the carb site cal69chevy posted a week back (thanks cal!!). Figured what the 7734. I've rebuilt 2 bbls b/4 but not a 4bbl. Its clean, started last night to put it back 2gether. Hope to have it done/running Friday p.m. And yes, took lots of digital pixs. The rebuild kit is ok but the exploded diagram aint to good and I have CRS. Thank god for the digital pixs.

04-04-2002, 07:18 PM	#7
don t. - 72gmc Registered User Join Date: Dec 2001 Location: harvard, il. USA Posts: 394	crs - cant remember ship 7734 - its an old timer way of saying where the devil lives. Write it on paper and hold it up to a mirror or something like that. I know, little things amuse little minds and god knows i've got a little mind. And thanks again for providing that carb web site. Gave me the gumption to rebuild mine.



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