How to understand automatic chokes part 1

[@shawnfoundation3926]

I love how thorough you are in all your videos. It makes the video more personable. Thank you

[@TylersNeighborhoodGarage]

Glad you like them!

[@shawnfoundation3926]

@@TylersNeighborhoodGarage if you ever get a chance cover the Rochester carburetor with the 1906 base plate where it has to vacuum lines

[@BIGbudz518]

wow i really like your videos i myself have been intimidated to attempt rebuilding my carb. on a 78 buick riviera w/403. but your vids are really informative i had the loose fuel pickup problem. never woulda done it without ur vids thx.

[@fritzblitz7073]

I just wanted you to know that this video is the only one that really helped me adjust my 78 vetts quadrajet carb. Also, you have a couple of camera angles that show what the linkage behind the choke spring looks like. This is the only place I could find those pics as well. Thanks so much for your information, the car starts and runs great now

[@TylersNeighborhoodGarage]

I'm really glad that so many of you have been helped. Hopefully it'll reverse the stigma that Qjets have these days.

[@you0rsp1]

Thanks for your vids. I had a vac. hose loose on my 83 Monte Carlo that I couldnt figure where the other end went for about 3yrs. I watched a few of your vids and from that I found the vac. port on the bottom of the carb., hooked up the hose, vrooom! Found my mixture screws too, down by the vac. port. Thanks for sharing!

[@TylersNeighborhoodGarage]

Congratulations! The "flap" part of the choke at the top is usually has spring pressure to keep it closed until some type of heating begins working on the spring that closes the choke in the first place. Sometimes the spring is on the carb itself or sometime on the manifold below the carb. So, what you are describing seems normal unless there is a bind caused by mechanical interference.

[@TylersNeighborhoodGarage]

That particular carb is a 1977 model, and it is one of the versions that uses a divorced choke..meaning the choke coil assembly is mounted in the intake and has a rod that runs up to the carb. If your intake does not have provisions for that, then you'll either need to consider finding another carb that has the integral choke, swapping intakes, or resorting to using a manual choke because those carbs can't be converted to use the integral choke.

[@DanielFreeMan365]

Good information. Due to your videos i have overhauled my rochester quatrojet and made it running decent , although i have some chalk issues again and fuel mixture issues ,

[@aaronair7889]

thx for all the info. never realized quadrajets were so easy to rebuild.

[@Hacker2013able]

Hey Man great video. I have been using these carbs since i was 16 and rebuilt a 307 chevy I knew choke n off choke never worried about it. I have 3 carbs on 3 moters that this choke thing will help. was thinking of getting rid of carbs n going to fuel injection for fast starts. Again thanks for your time.

[@piroguy14]

@WhoSaidTyler Well I took the inlet fitting off again and it turns out that the gasket is for a 1" diameter inlet and the gasket is located on the forward edge of the inlet fitting not the sealing flange, and it was there! I was so worried about over torquing the inlet fitting that i just didn't tighten it enough I guess. I tightened it up and no more leak. Its all trial and error at this point, this is my first project car ever so I'm learning as i go along, Thanks again

[@TylersNeighborhoodGarage]

Well just to reiterate the video...you need to have spring tension to make the choke come on and then a source of heat to make the choke disengage. That one came with a 2GV, which means it has the choke coil mounted on the intake and a rod running upward to the choke flap. Those usually are very simple and reliable but sometimes the linkage will hang up and make the choke/fast idle stay on.

[@Texassince1836]

on my ridin mower, i love having a manual choke. that old carb has seen better days, and i have to pull it apart for cleaning 3 or 4 times a season. if im mowin and it gets really dusty, the carb will start cloging. when it starts to clog, i can give it just a little choke to bring it back from lean

[@TylersNeighborhoodGarage]

@KCBCA Your problem appears to be that the fast idle setting is too high. There is a SEPARATE adjustment screw for that, and it's located on the passenger side of the carb between the choke housing and the carb itself, at the bottom. You'll have to really peer in there and find it, but it's there. I'm not talking about the two idle mixture screws which are on the base of the carb facing front. The one you want is far on the passenger side.

[@northdakotaham1752]

Really enjoy your videos on these Quadrajet carbs. As you went through in the first three parts of this series, the secondary portion of my Quadrajet would not function no matter what. Unlike your carburetor, mine has only one vacuum pull off at the rear which acts as a limit on those air doors and also acts as a choke pull off. So there are two linkages, one for the air door, one for the choke pull off. Well the second linkage had fallen off and was jamming up the end of the throttle shaft for the secondary. Could not see this from on top of the carburetor as it was on the engine because the electric choke housing covered it up along with some coolant hoses which run right next to the choke housing. Believe it or not....this is on a Mopar 360 cubic inch...Rochester Quadrajet, stock from the factory 1987! Been running on the primary jets only for the past 25 years maybe!! Lol!

[@TylersNeighborhoodGarage]

Haha, how about that. Yep, Mopar used Qjets from 1985-87 because Carter Carburetor exited the carb business during 1984-85.

[@northdakotaham1752]

Tyler's Neighborhood Garage this rig is running alot better since I worked on it... but is still a dog and I am not certain the secondary is working. Hitting wide open throttle just doesnt get much for hp. Starting to wonder if my exhaust system/cat. Convertor isnt partially plugged. Getting some strange rattling noises from under the floorboards. Will look into that when the wethr warms up.

[@TylersNeighborhoodGarage]

I actually like Edelbrocks since I've messed around with them and seen how simple they are to tune. It sounds at first blush like the secondaries are coming on when they should. That'll either come back to be a fuel supply issue or air supply. Those have that counterweight air door which really shouldn't give trouble. Will it open the 4bbl if you go into it gradually or does it just lay over any time you try to get all 4bbls opened up?

[@Herctech]

I have a automatic electric choke on a Quadrajet on my 305 engine. The Carb has been rebuilt. Can't seem to make adjustments that will make my Chevy truck drivable. It will idle in park but the minute you put it into drive it stalls. I have noticed that the choke plate flutters a bit when it is open (hot). I suspect I either have some sort of vacuum leak. Is it the linkage responsible for holding the choke plate open steady or is it the vacuum?. Please give me your thoughts on this.

[@TylersNeighborhoodGarage]

@KCBCA It faces the front of the car. Get yourself a short screwdriver that you are sure will fit in there and start the engine cold. Let it idle fast as you describe and begin turning that screw out(counter clockwise) The idle should start dropping down to a more reasonable level. Adjust it so it's still idling faster than when warmed up but not crazy fast. Again, this screw is located on the PASSENGER side of the carb. It doesn't screw into the carb itself.

[@Texassince1836]

my choke on my M4ME carb on my 1986 350 suburban was wired open when i bought it, and the low idle screw was screwed all the way in, so it was idling like 2000 rpm. i removed the wire, and choke plate. set the idle, and got the linkages working.now, i need to put the choke plate back on now. the choke missing doesnt affect my worn carb that much, because it runs super rich anyways. i know before long, im going to replace my carb

[@Goregoonswasteofspace]

Haven't watched yet (on now) I'm glad you posted this cuz i was afraid to ask! Looking forward to this little series! Thanks for the info!

[@TylersNeighborhoodGarage]

@brandon1997bmx the choke coil may need tightened by loosening the screws and rotating counter-clockwise

[@IvoPoblete]

If the choke's thermostat is riveted on from the factory do you recommend to drill out the rivets and put in screws??

[@TylersNeighborhoodGarage]

@@IvoPoblete yes, that is fine.

[@jeramibanks3276]

Just discovered your videos' Thanks for all the great information.

[@TylersNeighborhoodGarage]

Thank you.

[@aftershock2222]

Hi, I just used used your videos to rebuild my Quadrajet. I don't know if I have the choke set right. I can't open the choke flap unless I pull back the throttle lever. I see in your video you can move the choke flap freely without messing with the throttle lever. I have two other Quads where I don't have to mess with the throttle lever in order to move the choke flap. Is something out of adjustment? Thanks for your very informative videos.

[@dsnuts909]

I have Carb issuses recently rebuilt but when I hit the accelerator and the back barrel open u can c gas on the barrrel and bog down but if I stomp it and when it bogs down and if I let off the pedal some it Will take off then what is the problem

[@TylersNeighborhoodGarage]

@Hooverdarnit probably wouldn't affect it unless it created a vacuum leak. Of course, it would also be hard to start.

[@brandonallen914]

@WhoSaidTyler i rotated the the choke coil counterclockwise and the choke plate did snap shut but i started it and it idled really high not normal choke idle and and it acted like the idle was slowing down but it just started idling high again ?? please help me im lost ???????????????????

[@piroguy14]

Hi Tyler, so I recently replaced the fuel filter on my rochester 4bl on my 79 caddy and I am having that problem that you specifically talked about in one of your videos. I replaced the filter and now it drips from the inlet nut housing. I it took it back off and i either dropped it the first time and didn't realize or something because its not there now. Could you by any chance give me the dimensions of the gasket or where to find the dimensions so i can have Napa punch me out a new one? Thanks

[@Jason67945]

Did they use both the integral choke and divorced choke setups on 1979 chevy trucks?

[@TylersNeighborhoodGarage]

@piroguy14 I don't have access to that info unfortunately. Your best bet would be to take the filter housing with you, but keep in mind that gasket is nylon(plastic), not paper or rubber. You can also check the replacement filters to see if they include a seal. I often buy a carb kit just to use for spare gaskets, it'll have one in it.

[@Hooverdarnit]

Hi, I have a scooter with a 150cc 4 stroke engine. Since you know your auto chokes, , What would happen if a auto choke, suddenly fell completely off the carburetor? How would the engine perform?

[@TylersNeighborhoodGarage]

Another thing that can happen esp. after 40 years is the intake or the entire engine gets swapped for another one that doesn't have the choke mounted on the intake,,, because those are rare. Then the choke plate just stays in one position with no way to control it

[@alonzahanks1182]

to start the start curcuit on a eldorbrock or quadrajet you pump it twice and push it down a quarter inch and whenit fires let off

[@Hooverdarnit]

@WhoSaidTyler It's been easy to start but I've only started in inside my house, or immedeiately after getting it outside, or outside while the engine is still warm. (Too cold to work on it outside here in Minnesota.) There seems to be a air channel created when the enricher is bolted to the side of the carb. Does that sound like something that would cause a misfire at (and only at) higher speed?

[@sayshuh]

@WhoSaidTyler Thanks for keeping us interested and informed. ..and just ignore the SFB'S...I'm sure that they are too young to appreciate your knowledge. ..anyway, I have q-jets on two 350-4barrel Chevy engines so I need to know about the vacuum and when I should have to rebuild, also what is the best way to clean one while it's still on the engine. Here's to ya.

[@billydagenham]

So I did this, and it worked. Starts and runs like a champ, but I do have question sir. It'll start and idle at about 1100 right away but after some time, it'll climb yp 1500ish and hang there until current warms the coil. Any suggestions?

[@retrochristmas7329]

I'm trying to fix a buick 4.1 v6. The choke looks like it's just stuck open. When I push it there is no resistance it just bobs up and down. Do you think a spring or somthing is missing. The choke doesn't do anything when running or when giving it gas. It just stays open

[@TylersNeighborhoodGarage]

Missing or broken. Rod from the choke plate goes down to a small link that rides on the inner end of the choke "pivot". Sometimes they don't get put back correctly. The spring inside the housing is integral to the entire operation of the choke. Studying a picture or exploded diagram will help you understand what you are looking at.

[@skulledmonte84]

i tryed it again today , that flap just stays in one spot an if i gradually get on the gas an then floor it ,it doesnt do it as bad,,i tryed adjusting that flap by hand an still didnt make a diffenece were i would put it, i did try two different sets of metering rods an it still bogged,When i floor it i cant see no gas coming out of the accelerator-pump squirters,I have cleaned this carb out spotless so its not dirt ,iam just at a lost of what to do ,

[@Mr-ph5gb]

y would my truck be running better when its warm but the plate is set further close then wide open

[@brandonpayne1099]

I have a 1985 K10 with a 305 and when I cold start the motor it runs for a second or two and cuts off. When I start it again it usually stays running the second time. The other issue is that once it's warmed up do I have to pat the gas to get the idle back down or should it do it on its own?

[@AldRezaine]

I was riding my motorcycle going back home,I didn't noticed that my choke was fully on. I was running 60 kph and couldn't rise the speed. I reach 14 kilometers before I noticed that there was something wrong. What could be the effect to my motorcycle engine..?

[@TheWicho46]

Hello Tyler: I have a 1946 Cadillac with a flathead V8. My problem is the oil looks like it gets diluted with gas. Could this be choke problems? Does the fuel evaporate out of the carburetor when it sits for three days because I have a hard time getting it started. Carburetor fuel bowl goes empty. Carburetor is a Stromberg AVV-26 Any advice? Thanks again

[@katherinedeleon4209]

i have a 1991 astro van and everytime i turn the swtch on and push the gas pedal it wont start have to wait a couple of hours and try it again. then it starts if i dont press gas. ive been told its the choke and needs adjusting

[@LKRS111]

I have a 78 c10 and bought a new choke thermostat do u know the adjustments to kick it to start ?

[@mellowgnar]

im having trouble getting my flap to close for the choke.. the rpms just stay extremely high and the flap will not close ? any ideas ? not sure if it helps but i have a 1970 chevy biscayne and a rochester 2 barrel

[@lajonn99]

I have I boat with mercury 4.3 engine, when I took it to the lake RPM only go up to 2800 according to the book it should go about 4800 full throttle, when I got home I checked the carburetor and I notice the choke plate doesn't move much (almost no move) with engine off, is this why it won't go faster than 30mph ( RPM no higher than 2800) any suggestions? Thank you

[@TheRichardSimons]

I have a '75 covette with a quadrajet, and after I run it for a while it will run-on for a second after I shut it off, what could cause this? Its not running too hot but it stumbles when i try to engage the 4-barrels, could there be too much unburned gas? I have watched your other videos and will try to fix the 4-barrel problem, any ideas?

[@shogunMR]

awesome video you really helped me out... thanks a lot

[@TylersNeighborhoodGarage]

Thank you for watching.

[@shogunMR]

+WhoSaidTyler do certain carburetors give you a big Advantage as far as horsepower I have a 302 and it's in a small car called a Ford Maverick I want to get the most power out of it as I can any suggestions not just the carburetor but any suggestions thank you

[@hobbycentral3516]

Some people dont realize that there is lots to be learned within the ramble. For those who disliked the vid because of rambling about" irrelevant information"

[@TylersNeighborhoodGarage]

Sometimes the problem is the students, not the teacher.

[@joshb405]

I have an 87 grand prix and I been having trouble with it dying out on me a lot especially after I let it warm up and then put it into gear and it'll die out unless I pump the gas real quick just to keep it on, but after that it drives like a dream. Could it be a bad quadrajet carb

[@TheRicereater78]

What makes that choke housing work? I just ordered a carb that has a housing like the one shown. There's a block off plate on my manifold that I know works everything, but can't seem to find what Im going to need to make it work. I know a bit about qjets. I'd like this to be my first one with a functioning choke though. Lol

[@TylersNeighborhoodGarage]

It works off of hot air. A steel line normally leads from a connection at the top rear of the air horn down to where that block-off plate is. There is supposed to be a part called a heat stove in the intake manifold. A heat stove is simply a length of steel tube that will fit inside that recess there and causes the air passing through said tube to get hot. The air is drawn through the heat stove and into the choke housing by a small vacuum orifice inside the choke housing. Of course, there is a tube that leads from the heat stove to the choke as well. What kind of engine is this? Oldsmobile commonly used hot-air chokes and the parts for those are easy to find, but although Chevy did use some hot-air chokes, the parts are slightly more scarce.

[@TylersNeighborhoodGarage]

Google Oldsmobile hot air choke and look at the images for that search. You'll see right away the different parts I described. It's a very simple system.

[@brandonallen914]

When i hit the gas with the engine off the choke doesent snap shut ?? i dont know why ? i have a 78 el camino with a electric automatic choke

[@eddyviberollin]

What happens if you try to adjust those two screws and there's no response. Is there a rule of thumb about how to adjust them for instance should I turn it all the way to the right and then back it off maybe one turn

[@TylersNeighborhoodGarage]

If they don't respond, then possibly something is affecting the mixture, such as a vacuum leak, or the carb is dirty/running too rich. Sometimes the ignition timing being out of adjustment can have the same effect. On the mixture screws, a baseline is to run them in(clockwise) until they lightly seat, then back out 2-1/2 turns.That should always get one running.

[@mramazing9000]

so nice if you to help so many ppl, now heres my problem , i have a 1978 Camaro 350 with a quadrajet ,electric choke, my idle screw is all the way out but it still idles too high, seems to drop down good when in gear but when i put it back in park up it goes, new with carbs so help plz

[@bojackson3923]

I have a 85 Chevy Caprice it when I start it idled high n why does it takes so long to idle down what's the problem??

[@animeworkshop82]

Hi I have a 1978 bucket regal limited 5.0 305 V8 with a 4 barrel carb quaddrowjet divorced choke it has a problem starting in warm and cold weather and it wants to die all the time could that be the carb or no should I buy a new one

[@adrianmelendez6450]

hey I was wondering if u can help me. I just bought my first truck , its a 74 chevy pick up 350 and I crank it and it starts but it shuts off after 3 sec I also notice that gasoline is shooting out the top of the carb right next to the choke flap do u think that its to much fuel getting into the carb ? how can I fix this problem

[@TylersNeighborhoodGarage]

Nothing. However, some folks prefer having the automatic choke function, so this is to help guide them in making adjustments and repairs.

[@doughogan1858]

My Rochester 4 barrel (1988) on a marine Chevy 350 (28 foot Bayliner boat) starts and runs but when kick in the gas it dies. Runs great under idle and at high RPM's, but when put into gear and put it under load dies. Ideas?

[@glennmanchester1568]

Doug Hogan the switch that makes the engine stumble or actually shut off for a second when you put it in gear is out of adjustment it has the switch to save wear on the out drive gears when engaging forward and reverse

[@JoePublicVA]

There u go. Cant do it right unless its on the kitchen table. Thumbs up!

[@TylersNeighborhoodGarage]

sounds like the ground through the choke is being disrupted somehow.

[@thxmateoli]

Can you explain why some electric choke carbs like edelbrock 1406 don't use a vacuum brake and still work well on cold starts?

[@TylersNeighborhoodGarage]

They have one, it's internal.

[@thxmateoli]

Explain, I took mines apart and didn't see anything like that.

[@TylersNeighborhoodGarage]

Go down this page until you find "choke adjustment". On these it is called a choke piston, but still works from vacuum. It's part of the choke housing. If you look at the front part of the housing you'll see the shape of the bore that the vacuum piston travels in. www.telusplanet.net/public/gilesij/Volvord/section_2.htm

[@steveacevedo4052]

I have a 1987 Monte Carlo super sport it seems when I put the car and drive or reverse the idle drops. Even if I put the AC on car wood putter like it wants to stall does anyone have any ideas was told it could be. I was told it could be the Idle control valve but not sure where its located ?

[@TylersNeighborhoodGarage]

Steve Acevedo Steve those don't have an idle control valve. Those are a fuel-injected part. Your car has a plain old carburetor, which in this case is computer-controlled but still adjustable. If you don't feel capable or have the means to adjust the carb and timing and check for vacuum leaks, then I suggest you find a GOOD garage with mechanics that have been there long enough to have worked on carbureted cars and have the following done: 1. Check and adjust ignition timing 2. Check and adjust idle mixture if possible. Sometimes the adjuster screws are sealed. 3. Check and adjust automatic choke, fast idle speed and base idle speed. 4. Check idle-up solenoid for proper operation with AC on. I can further explain any of this if you desire.

[@TylersNeighborhoodGarage]

LOL. Thank you for your comments, they are duly noted. It's always refreshing to learn how non-mechanics say and do things. "You wouldn't have to make 2 videos to explain what a automatic choke does if you knew in advance what to say"....well, IMPROVKING, maybe I was winging it on the fly. Also, what about the time it took you to think about and post you comment? You wasted that time too because it didn't change anything, video's already made and posted ;-)

[@Stephanie-bu2tl]

my name is scott and hope you can help. i have 79 k10 5.7 it leaks gas in to the engine when it sets. it runs great just after it sets i have to crank it for awhile before it starts and then it smokes but it gas smoke do u have a fix for that.. thanks

[@billhicks3117]

b

[@Brandon10101011]

valve spring seals? mine had a similar problem after a day of not running it burned a tinny bit of oil

[@TheActionistheJuice]

I have a Manuel choke on my 240z. Been having problems with it warming about and keeping the idle. It turns off if the choke isn't open. What do you think is wrong?

[@TylersNeighborhoodGarage]

It won't hurt it but I would change the oil. It's probably diluted with gas now. It's worse to run lean than too rich.

[@lamdasond]

My lincoln with 460 cid ford semes to have hot air system and an electrickal conetor to the choke housing is it boulth systems? Anyway i had plugged the hot air system stupid me:-D so now it works!

[@TylersNeighborhoodGarage]

Yes, it's a hot air choke with electric assist. Mainly done to make sure the choke did not stay on longer than needed during moderately cool weather. There's an electric switch that cut the electric assist when the temps got low and the choke needed to be on longer.

[@kokonutt99]

so when your car is off and cold the choke should be wide open right?? mines stays closed . I open with my finger and it clicks and stays open. this is when the car is cold and not been running for awhile.

[@Sketchy_Vettes]

Flap should be closed when cold, it'll open up with heat

[@pennybay]

you need to tell people when they pump the gas a couple times to TAKE YOUR FOOT OFF THE PEDAL or the choke won't set properly. right?! jersey george

[@TylersNeighborhoodGarage]

Lol...duly noted. Thanks.

[@Nrgzrbunny777]

What's wrong with manual choke?

[@TylersNeighborhoodGarage]

@iamtherebel My pleasure.

[@electriciandallastx9182]

Thanks for the thoughts you have contributed here.

[@skulledmonte84]

My question is about your favorite Edelbrock carb LoL ,Well you said not to be afraid, So I got a 650 Thunder series,On a 350 sbc ,it starts up good, idles fine, but when i full throttle it, it just bogs an it will stall ,runs great if i don't try to floor it,Any ideals of what i can check? i did clean the carb out ,an check the float settings ,maybe i can do a video of how it acts,An i guess iam Joeblow lol i did that one time but was like 18 at the time learned a lesson that dad, lol .

[@TylersNeighborhoodGarage]

It's certainly possible but I think by that time most had an integral, hot air choke.

[@Crackerjacks420]

I like to watch cold start videos also..

[@billydagenham]

Really excellent video man

[@dethklok6356]

And now my choke works. Thank you.

[@iamtherebel]

thank so much for making this its help alot.

[@NoPaintGarage]

great video man!

[@courriervirtuel8053]

Thanks for the info dude.

[@TylersNeighborhoodGarage]

+Courrier Virtuel Always welcome.

[@TylersNeighborhoodGarage]

Are NOT coming on....

[@Texassince1836]

a manual choke wouldnt bother me in a car, and if it was a classic, like 40's or 50's, i'd make sure it was manual.

[@melvinnewsome6821]

invest in a tripod for camera?

[@the1spyderryder]

YES BY ALL MEANS get a tripod!

[@brandonallen914]

@WhoSaidTyler ok i will try that and respond

[@Buckoux]

Man, you waste a lot of time with idle chatter...had to leave at 4:00 into video...

[@skulledmonte84]

Just uploaded a short clip of what its doing. please check it out an comment

[@honi9]

4min in and the choke plate closes, get to the point FFS

[@TylersNeighborhoodGarage]

Yawn....

[@Superflyssrs]

Good info, but get to the point!!! Damn

[@billturville15]

You talk too slow and have problems getting to the point....seems you know what you're talking about, just take to long to get to the point.

[@elplateado0018]

20% OFF SAMSUNG APPLIANCES

[@elplateado0018]

Thank you for the video.

[@chrisfoster7702]

maybe if you didn't ramble so much you wouldn't have to break it into two parts

[@TylersNeighborhoodGarage]

+Chris Foster Damn...why didn't I think of that? I guess I just shouldn't talk at all in videos, just point at stuff and hope people can figure it out.

[@TylersNeighborhoodGarage]

+Chris Foster And PS...if you piss me off any further, I'm going to block your ass. It's my channel and I do it my way, so F.O.

[@chrisfoster7702]

Oh chillax dumarse

[@TylersNeighborhoodGarage]

+Chris Foster I guess I could complain about your videos somehow, but #1. I have better things to do with my time and #2....you don't have any. Another troll who KNOWS how videos should be made but doesn't actually MAKE them. I never get complaints from people that put their own videos up. What does that tell you?

[@chrisfoster7702]

This tells me you definitely don't have anything better to do with your life. And the films I make aren't suitable for KZbin 😉

[@MrCHEVYBOI706]

I HAVE A 82 C10 AND it has the electric choke and the light stays on and it will go off when i loosen the 3 bolts, what the promblem?

[@MrSteve24fps]

My Rochester quadrajet attached to my '74 Olds 98 will not start after sitting maybe 10 days unless primed. Any idea on how to correct this?

[@rick8676]

Not sure if my scenario matches your issue, but on my 78 Silverado, the fuel tank is mounted so low that the fuel drains back to the tank, emptying the fuel line, and applying a vacuum to the needle in the seat. If enough time has passed it won't break the vacuum and a splash of fuel in carb is needed. I have a clear fuel filter that will be empty, I crank until filter contains fuel, one pump on pedal, splash of fuel, and fires right up. Maybe I have a needle / seat issue, maybe I have a fuel pump issue. Hope this helps

[@adgalloway1]

Steve, If you watch some videos about Quadrajet rebuilds they talk about lead well plugs on the bottom of the center section of the carburetor, the section that holds the float, needle and needle seat, etc. Those plugs tend to develop slow leaks after thousands of heat cycles. You can melt them and replace with epoxy, JB weld, etc. Google up Quadrajet Well Plugs and you'll find info on this. When they leak slowly over several days the fuel in the carb bowl drains out, this causes hard starting because you have to wait for the fuel pump to refill the fuel bowl. I bet that's the cause of your issue.