General Discussion Discuss your Oldsmobile or other car-related topics.

quadrajet rebuilding

Old June 12th, 2019, 03:29 AM
  #1  
Registered User
Thread Starter
 
Join Date: May 2016
Posts: 108
quadrajet rebuilding

need to have my quadrajet carb rebuilt, i read some of the posts on people who rebuild them but can't find them.
vickycar is offline  
Old June 12th, 2019, 04:08 AM
  #2  
Registered User
 
rand5204's Avatar
 
Join Date: Mar 2012
Location: Cumming, GA
Posts: 580
I've had Ken rebuild two of my carbs. Did a great job. Even advised me against doing work he didn't think was needed.

[email protected].
860-218-5780
rand5204 is offline  
Old June 12th, 2019, 05:03 AM
  #3  
Moderator
 
Olds64's Avatar
 
Join Date: Jul 2007
Location: Edmond, OK
Posts: 10,899
I had Danny Sarvis (70WCars) rebuild a Q-jet for my 71 98. It ran so much better than the POS Summit carb I have now. He hasn't been active in years but you might try sending him an e-mail though his profile.

https://classicoldsmobile.com/forums...s/70wcars.html
Olds64 is online now  
Old June 12th, 2019, 05:28 AM
  #4  
Registered User
 
ELY442's Avatar
 
Join Date: Jul 2009
Location: Brooklyn, NY
Posts: 1,201
Phil at Custom Rebuilt Carburetor 732-356-4333, www.customrebuiltcarbs.com
ELY442 is offline  
Old June 12th, 2019, 05:45 AM
  #5  
Registered User
 
Burd's Avatar
 
Join Date: Oct 2012
Posts: 123
Where are you located, I have an awesome guy that does carbs here in the D
Burd is offline  
Old June 12th, 2019, 06:54 AM
  #6  
Registered User
 
allyolds68's Avatar
 
Join Date: Jul 2008
Location: Seneca Falls, NY
Posts: 4,269
Originally Posted by vickycar View Post
need to have my quadrajet carb rebuilt, i read some of the posts on people who rebuild them but can't find them.
Eightupman (John Herald Jr) on ClassicOlds has a great reputation and he just spent about 15 minutes on the phone with me talking me down from the ledge on a carb that I bought from a reputable q-jet rebuilder. It wasn't running worth a crap and I couldn't get a hold of the rebuilder. John walked me through the basic settings and I was able to tune it in from there. Some of the settings were so far off I never would have been able to figure it out myself

Last edited by allyolds68; June 12th, 2019 at 06:59 AM.
allyolds68 is offline  
Old June 12th, 2019, 07:20 AM
  #7  
Registered User
 
Burd's Avatar
 
Join Date: Oct 2012
Posts: 123
You can also send it to cliff in Ohio. He can flow bench test it, re color it, has all the parts, or can hop it up for you. anything you want to pay for. Lol


https://cliffshighperformance.com/

Last edited by Burd; June 12th, 2019 at 09:13 AM.
Burd is offline  
Old June 12th, 2019, 08:00 AM
  #8  
Registered User
 
Join Date: Feb 2009
Posts: 1,987
Everyday Performance has the best quality, service, tech support and turn around time.

#1 in my book.
My442 is online now  
Old June 12th, 2019, 11:47 AM
  #9  
Registered User
 
D. Yaros's Avatar
 
Join Date: Nov 2006
Location: SE Wisconsin
Posts: 1,794
Two that have been doing just this for quite some time, with excellent results -
Sparky's Carburetor Service http://www.sparkyscarbs.com/
Daytona Parts Co http://www.daytonaparts.com/
D. Yaros is offline  
Old June 12th, 2019, 04:38 PM
  #10  
Registered User
Thread Starter
 
Join Date: May 2016
Posts: 108
thanks guys question answered
vickycar is offline  
Old June 12th, 2019, 04:53 PM
  #11  
Registered User
 
Join Date: Jun 2009
Location: southern New Mexico
Posts: 12,132
DO IT YOURSELF!

I rebuilt the quadrajet on my '78 Toronado. Second time I've rebuilt a carb. First time was the two-barrel on my '67 Delta 88. It's really not difficult, will save you A LOT of money (just the cost of a $20 rebuild kit), and you get a lot of satisfaction in doing the job yourself. And you can do it in an afternoon, not wait the weeks or whatever to get it back from a rebuilder.

People find the prospect of rebuilding a carburetor intimidating and seem to think that rebuilding one requires some kind of magical skill, and the professional rebuilders want you to think this so that you'll pay their several hundred dollar fees. But rebuilding a carburetor is not like creating a painting or any work of art. There's no "judgment" involved. You just disassemble it and reassemble it with the new parts in the kit. Not much different from fixing a broken table lamp. Just more parts. Then make the necessary adjustments when it's on your car. It's not complicated, and there are lots of video to show you how to do this as well.

I found this video be very helpful. I actually had my laptop computer on the workbench and would pause the video as it went along and as I did each step.

jaunty75 is offline  
Old June 12th, 2019, 06:06 PM
  #12  
Registered User
 
Burd's Avatar
 
Join Date: Oct 2012
Posts: 123
Dang, I can’t believe how many still do them. Lol
Burd is offline  
Old June 12th, 2019, 10:39 PM
  #13  
Registered User
 
OLDSter Ralph's Avatar
 
Join Date: Sep 2017
Location: St. Paul Minnesota
Posts: 1,152
Quadrajets are very versatile carbs. They were used on a variety of engines, and up to 500 cubic inch engines. Some consider them dinosaurs, but they can be performance tuned. Many people don't understand them and opt for an after market carb. There wouldn't be as many good "performance rebuilders" out there, if they were as bad as many people infer.
.........Just my two cents worth.
OLDSter Ralph is offline  
Old June 13th, 2019, 04:04 AM
  #14  
Registered User
 
Join Date: Apr 2008
Location: Delmar, NY
Posts: 265
Jaunty: Good point. I agree you can rebuild yourself. Not that hard to do. I have done a few over the years and they ran fine. However, I would personally spend the money on someone who can set it up exactly and re-bush the throttle shafts. After this many years, the throttle shaft area gets worn on these old carbs and potential vacuum leaks. You can buy a kit to rebush it yourself but I would rather pay someone who can drill it exactly straight, etc.

all that being said, I have heard good things about both Ken at everyday performance in CT and custom rebuilt carbs in NJ.
oldsconv is offline  
Old June 13th, 2019, 04:42 AM
  #15  
Registered User
 
Burd's Avatar
 
Join Date: Oct 2012
Posts: 123
There is a guy in Burbank Cal, BFIC. He’s had rare carbs on the shelf ready to go. If your looking for a certain number. Call Carlos.


https://www.carbsonly.com/frames/carsandtrks.htm
Burd is offline  
Old June 13th, 2019, 04:48 AM
  #16  
Registered User
 
Burd's Avatar
 
Join Date: Oct 2012
Posts: 123

While we’re on the topic, this guy was at the TA natz a few years back, I picked up his book, I thing he quit printing it already, I can’t find it on line, it’s good for the swaps. It lists a lot of carbs. Lists what it’s for, even service replacement and marine. If you got a carb laying around and don’t know what it’s for, let’s try it.

Last edited by Burd; June 13th, 2019 at 04:54 AM.
Burd is offline  
Old June 13th, 2019, 05:09 AM
  #17  
Moderator
 
Olds64's Avatar
 
Join Date: Jul 2007
Location: Edmond, OK
Posts: 10,899
Originally Posted by jaunty75 View Post
DO IT YOURSELF!
x2

If you enjoy turning a wrench, rebuilding your Quadrajet is a good option.
Olds64 is online now  
Old June 13th, 2019, 10:30 AM
  #18  
Registered User
 
Join Date: Jan 2010
Location: central Indiana
Posts: 1,234
Originally Posted by Olds64 View Post
x2

If you enjoy turning a wrench, rebuilding your Quadrajet is a good option.

Rebuilding one is no big deal. The problem comes with re-calibration and repairing 40 years of wear. Usually there are some changes that need to be made to the tune for todayís gas, and to compensate for engine modifications. Thatís when itís nice to buy the kit from a Q-Jet specialist, not only will they have the special tuning parts, but the quality is probably much better than your 20 dollar parts store rebuild kits
matt69olds is online now  
Old June 14th, 2019, 06:43 AM
  #19  
Registered User
 
rickw30's Avatar
 
Join Date: Oct 2014
Posts: 11
Matt69olds is correct.
Doing it yourself is no big deal. It's knowing the tricks that important. I used Cliff Ruggles for my 70 w30. I have rebuilt it many times throughout the years and finally decided to let Cliff do his magic.
It was very reasonable and a fast turnaround. He incorporated all the tricks and the carb looks and runs perfect. He was a pleasure to deal with.
rickw30 is online now  
Old June 14th, 2019, 06:44 AM
  #20  
Registered User
 
Join Date: Feb 2019
Location: The Seasonally-Frozen Wastelands
Posts: 111
Originally Posted by jaunty75 View Post
DO IT YOURSELF!

I rebuilt the quadrajet on my '78 Toronado. Second time I've rebuilt a carb. First time was the two-barrel on my '67 Delta 88. It's really not difficult, will save you A LOT of money (just the cost of a $20 rebuild kit), and you get a lot of satisfaction in doing the job yourself. And you can do it in an afternoon, not wait the weeks or whatever to get it back from a rebuilder.

People find the prospect of rebuilding a carburetor intimidating and seem to think that rebuilding one requires some kind of magical skill, and the professional rebuilders want you to think this so that you'll pay their several hundred dollar fees. But rebuilding a carburetor is not like creating a painting or any work of art. There's no "judgment" involved. You just disassemble it and reassemble it with the new parts in the kit. Not much different from fixing a broken table lamp. Just more parts. Then make the necessary adjustments when it's on your car. It's not complicated, and there are lots of video to show you how to do this as well.
Originally Posted by oldsconv View Post
I agree you can rebuild yourself. Not that hard to do.
Originally Posted by Olds64 View Post
x2

If you enjoy turning a wrench, rebuilding your Quadrajet is a good option.
Originally Posted by matt69olds View Post
Rebuilding one is no big deal. The problem comes with re-calibration and repairing 40 years of wear. Usually there are some changes that need to be made to the tune for today’s gas, and to compensate for engine modifications. That’s when it’s nice to buy the kit from a Q-Jet specialist, not only will they have the special tuning parts, but the quality is probably much better than your 20 dollar parts store rebuild kits
A high-school kid can rebuild (clean, and put a kit into) a Q-Jet. A talented kid with some guidance could rebush the throttle shafts.

The problem is RECALIBRATING the carb. THAT takes far more talent and experience than a "rebuild". And most folks aren't equipped to re-plate tarnished parts to restore the "new look".

If the carb isn't being recalibrated--just returned to stock calibrations except "clean and properly-adjusted", there's no reason you can't take this project on as a weekend project. When practically every car on Earth had a carburetor, lots of carbs got rebuilt with aerosol carb spray to clean 'em, and a parts-store "kit" of gaskets and small parts.

TODAY I'd want one of Cliff Ruggles' accelerator pumps at minimum, but his entire kit would be nice. His pumps will survive E10 fuel, and some others won't even though they're advertised as "Ethanol safe".

While you're at it, get Ruggles' book on Q-Jet carbs, and a copy of Doug Roe's book on Rochester Carbs including Q-jets. Heaps of good info in both.

Last edited by Schurkey; June 14th, 2019 at 06:46 AM.
Schurkey is online now  
Old June 15th, 2019, 05:31 AM
  #21  
Registered User
 
zeeke's Avatar
 
Join Date: Jan 2016
Location: Nassau County, NY
Posts: 957
Larry Isgro Carbs, 1604 Argyle Road, Wantagh, NY 11793, 516-783-1041 He's been doing all types of carbs for over 50 years.
zeeke is offline  
Old June 15th, 2019, 04:00 PM
  #22  
Registered User
 
olds 307 and 403's Avatar
 
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 4,833
Originally Posted by rand5204 View Post
I've had Ken rebuild two of my carbs. Did a great job. Even advised me against doing work he didn't think was needed.

[email protected].
860-218-5780
◊2 did a custom tune on a 78 403 carb that wouldn't idle. Years after I had him build it, I had a weird choke issue bending linkage. He sent me parts free of charge. He is a Buick guy but currently owns a 84 Hurst/Olds he is fixing up.
olds 307 and 403 is offline  
Old June 15th, 2019, 08:39 PM
  #23  
Registered User
 
Join Date: Jan 2012
Posts: 41
Bought a Quadrajet from Quadrajetpower.com about a month ago and I would not recommend them. Had too many issues for as much as it was. A carburetor from a reputable builder should not have a stuck float, loose bolts, or a secondaries that have not been adjusted to open completely...
72442conv is offline  
Old June 16th, 2019, 08:50 AM
  #24  
Registered User
 
Join Date: Aug 2013
Posts: 43
I've use Cliff Ruggles as well for the carb on my 72 W30. He is a big fan with the Pontiac guys. That was over 15 years ago and all is well. But I've heard that when he gets backed up there can be as much as a 12 month wait. I recall at the time it took about 30 days to have mine rebuilt.

Warren
Warren Seale is offline  
Old June 23rd, 2019, 07:35 PM
  #25  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Would any know what could cause WOT on a Rochester Quadrajet 4 Barrel?
synoptic12 is offline  
Old June 23rd, 2019, 07:44 PM
  #26  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
Originally Posted by synoptic12 View Post
Would any know what could cause WOT on a Rochester Quadrajet 4 Barrel?
Pushing the go pedal to the floor.
tru-blue 442 is online now  
Old June 23rd, 2019, 07:50 PM
  #27  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
Pushing the go pedal to the floor.
* What if accelerator "Jams" while accelerating, and WOT occurs, then what is the cause?

Last edited by synoptic12; June 23rd, 2019 at 07:52 PM.
synoptic12 is offline  
Old June 23rd, 2019, 07:51 PM
  #28  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
Return spring on backwards?
tru-blue 442 is online now  
Old June 23rd, 2019, 07:57 PM
  #29  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
I see you edited. Sounds like it may have a few strands of broken throttle cable internally causing it to stick.
tru-blue 442 is online now  
Old June 23rd, 2019, 07:58 PM
  #30  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
Return spring on backwards?
*I would not know. The Rochester was rebuilt by a carb guy over fifteen years ago. It is highly unlikely that the return spring is on "backwards". The Rochester has worked for fifteen years and still works. Had WOT occur and it was not any event to be left for the weak. Do not know squat about carbs, just the basics. I just shifted in neutral and gunned the accelerator to kick it back down which worked. Someone said to shut the motor off or you could blow the motor. Any assistance here is appreciated.
Cleaned the exterior housing and everything is normal at the moment. Do not wish to be in that position again.
synoptic12 is offline  
Old June 23rd, 2019, 08:01 PM
  #31  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
I see you edited. Sounds like it may have a few strands of broken throttle cable internally causing it to stick.
* I've heard that before. The throttle cable looks good to the point I can see, no broken strands. Thanks much.
What do you mean 'internally'? If it were the throttle cable, what would replacement cost be?
synoptic12 is offline  
Old June 23rd, 2019, 08:05 PM
  #32  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
If that ever happens always just shut the engine off and pull over. What your describing sounds like a bad throttle cable to me.
What make and model car is this?
tru-blue 442 is online now  
Old June 23rd, 2019, 08:15 PM
  #33  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
If that ever happens always just shut the engine off and pull over. What your describing sounds like a bad throttle cable to me.
What make and model car is this?
* Thanks very much. I was concerned as to shut off the vehicle going about 60, I would lose the power steering. I have a 1986 Oldsmobile Cutlass Supreme Brougham, 307 C.I.D. Vin Y. What is the cost of the throttle cable, repair cost and could it be anything other?



synoptic12 is offline  
Old June 23rd, 2019, 08:19 PM
  #34  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
Originally Posted by synoptic12 View Post
* Thanks very much. I was concerned as to shut off the vehicle going about 60, I would lose the power steering. I have a 1986 Oldsmobile Cutlass Supreme Brougham, 307 C.I.D. Vin Y. What is the cost of the throttle cable, repair cost and could it be anything other?


https://www.partsgeek.com/gbproducts...xoCT2cQAvD_BwE
tru-blue 442 is online now  
Old June 23rd, 2019, 08:21 PM
  #35  
Old School Olds
 
tru-blue 442's Avatar
 
Join Date: Nov 2008
Location: Marble Falls TX
Posts: 7,784
They are relatively easy to change out. You could possibly U tube it to get an idea. Also, yes you would lose
power steering and your power brakes with the engine off but you can power through that with a heavy foot and strong arms.

Last edited by tru-blue 442; June 23rd, 2019 at 08:32 PM. Reason: spelling
tru-blue 442 is online now  
Old June 23rd, 2019, 08:32 PM
  #36  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
They are relatively easy to change out. You could possibly U tube it to get an idea. Also, yes you would loose
power steering and your power brakes with the engine off but you can power through that with a heavy foot and strong arms.
* That is the specific reason I did not shut the ignition 'off', due to possibly losing control, especially in traffic. Could I shut the ignition off and shift into Neutral and start in Neutral? What I did was move the gear selector into Neutral, gun the accelerator and then shift back into Drive which worked. Is this method o.k.? Hesitant to believe that it could be a throttle cable whereas the causes are not really related to a frayed throttle cable which it is not. Some points of a bad throttle cable pertain to cruise, rough idle etc. but I do not know. I'm not touching the Rochester, rather have someone look at it, if I can find someone. Thanks very much.
synoptic12 is offline  
Old June 23rd, 2019, 08:34 PM
  #37  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by tru-blue 442 View Post
* I'm familiar with Parts Geek, has some excellent prices. However, I'm not touching anything on the Rochester, just not my forte. Thanks for your input.
synoptic12 is offline  
Old June 23rd, 2019, 08:43 PM
  #38  
Registered User
 
Join Date: Feb 2019
Location: The Seasonally-Frozen Wastelands
Posts: 111
IF (big IF) the throttle was WFO, and you threw the shifter into neutral, the connecting rods came out of the block and you drove over them. And the crankshaft.

I'm guessing the throttle was not WFO, at least not the secondaries if the engine survived running at no-load.
Schurkey is online now  
Old June 23rd, 2019, 08:52 PM
  #39  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
Arrow

Originally Posted by Schurkey View Post
IF (big IF) the throttle was WFO, and you threw the shifter into neutral, the connecting rods came out of the block and you drove over them. And the crankshaft.

I'm guessing the throttle was not WFO, at least not the secondaries if the engine survived running at no-load.
* Could you place that synopsis in terms I can comprehend, WTO? Are you saying that moving the selector in Neutral could damage the connecting rods and leave the crankshaft damaged as well? If this occurs again and I shut the car 'off', how do I restart in traffic going about 70 m.p.h.? Thanks very much.

"I'm guessing the throttle was not WFO, at least not the secondaries if the engine survived running at no-load" > 'Please elaborate in terms I can understand. Thanks very much.
synoptic12 is offline  
Old June 23rd, 2019, 09:17 PM
  #40  
Registered User
 
synoptic12's Avatar
 
Join Date: Mar 2012
Location: Rhode Island
Posts: 176
* I found this piece which seems to relate to my issue:

Sudden Surge in Speed While Driving on the Highway
This is a particularly hazardous situation. What usually happens is that at high speeds, the butterfly valve inside the throttle may close up, and if the driver pushes on the pedal harder, the valve 'pops' open suddenly, giving the car an unintentional burst of speed. All of this happens if the sensor is unable to detect the closed position of the throttle.
*Could the TPS be at fault?
synoptic12 is offline  

Thread Tools
Search this Thread
Quick Reply: quadrajet rebuilding


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.