Quadrajet bog. diagnosing and secondary air door adjustments

[@williamfied9500]

Mint video. I’m late to the party but it literally answered all my questions. Hope you are doing well these days.

[@UsefulEntertainment]

im glad the video helped you the best it could. were all doing good man, thanks.

[@ashqelon7267]

This is a proper guys garage. 2 cars 3 engines, one on a stand a bench overly cluttered with pieces and 5 quadrajets!

[@UsefulEntertainment]

LOL

[@Ajaxaxxess]

And i bet he knows where everything is that is important.

[@UsefulEntertainment]

@@Ajaxaxxess always 👍

[@dexyyxed]

adjusted my secondary air door spring tension today and replaced rotor and cap. Bog totally fixed. 81 C20 with 5.7l thanks!!!

[@UsefulEntertainment]

glad to hear man

[@Just.bonsai]

Thank you for this video! Quick, clean and easy to understand. I'm going to check this on mine later.

[@joevette6290]

Thanks bud!! I have bogging from too tight air flappers !! Great video

[@PEDDALIT]

I was wondering how that adjustment worked, thanks!

[@macs8347]

Great vid. Greetings from Poland.

[@deanwelch1060]

This info fixed my bogging carb, Thanks for the info you saved me pulling more hair out.

[@UsefulEntertainment]

You got it, glad to help out.

[@brettslater872]

I have a QJ on my 70 Stage 1 4-speed that's been rebuilt by a very knowledgeable builder. He actually sent me video of it on his Stage 1 and it worked flawless. However, he's got an automatic with a higher stall converter - which can mask over any slight adjustment issues. As it stands, I have a SLIGHT hesitation when I hammer it and I'm hoping this video (which he's seen and gave the 👍) will aid me tomorrow when I tackle this. Thanks!

[@UsefulEntertainment]

dude thats 1 badass car and i hope this trick works out for you. i feel famous lol.

[@brettslater872]

@@UsefulEntertainment 🤣🤣

[@brettslater872]

Thanks!!

[@gustavette8487]

Great video. A bit off topic, but how do I get the primary butterfly to stay closed until I start the car. I understand that they should be closed and then, when you start the car, they instantly open a bit and then gradually open up to vertical when car is warmed up. Mine stay always at about 1/4" open when I flip the throttle (engine cold). I cannot seem to get them to fully close when cold, by playing with the choke (CCW) or the screw kick-back vacuum can lever...

[@cheesechizel594]

thanks for taking the time to make this - I'll be checking these things on mine tomorrow

[@UsefulEntertainment]

cheese chizel yep, no problem. hope everything works out for you.

[@UsefulEntertainment]

hey im not sure if the spring can break, if the flat head screw on the side endlessly turns maybe it is broken. your saying your doors have no spring load what so ever? id take the carb off and investigate. I never had to take the air doors off before to slide that rod out but im sure it cant be that complicated. the tricky part will be finding a spring, id call around. look up a company that rebuilds quads and ask them where to find the spring if you need.

[@joevette6290]

What's the tension on adjusting the allen screw and flat screw on secondary flappers?? any factory specs?, or just loosen them if flappers don't open on full throttle and bogging my engine abs alot of gas smell in car until I let go the gas!!! Thanks bud

[@oldschool8665]

helped a lot finally fixed my carb and cool music you know the name of the music . it’s like on the top of my toung

[@UsefulEntertainment]

well im glad i could help somebody lol i made the video i cant remember all the songs playing but i do remember a lot of alive cooper

[@TrentGustus]

Tighter is leaner, i had little tension on mine, no bog, but rich. If the car is light and can accelerate quickly, doors can have light tension. If its a truck, or a heavy vehicle i think it needs more tension.

[@GarthThomson]

Great video! The vacuum controlled pull off on mine is holding the secondary air flapped locked closed, even on wot (unless I disconnect the vacuum to the pull off in which case she runs beautifully). Is the pull off relay supposed to release on hard acceleration (with the drop in manifold vacuum pressure) so the secondary air flaps open? Mine doesn’t seem to on test drive. Any ideas on how to beat resolve this? TIA

[@UsefulEntertainment]

I think sometimes the diaphragm can go bad in them but im still not sure to be honest. is there a little metal tab behind the choke that can swing back and forth??? sometimes that stops swinging out of the way when the car warms up and it keeps the secondarys locked out permanently. if thats the case you can zip tie it back out of the way or just cut it off with a grinder

[@GarthThomson]

Useful Entertainment thanks. Mine works off a spring that expands when hot and a lever attached to it and the primaries choke flap opens the flap. It seems to be good now 🤷🏼‍♂️

[@kimadams7632]

How about a Quadra jet that hesitates on acceleration after the choke warms up

[@bh86utid]

My doors are getting stuck almost like there’s a lip at the top of the carb. If I loosen the flat head screws that hold the secondary doors to the rod they will release and move freely. Any idea what causes that?

[@IvoPoblete]

Is the first a Q-Jet E4MC??

[@UsefulEntertainment]

how fresh is the cap, rotor, plugs & wires?

[@QuintshaunGodard]

My quadarajet stall when I put it in drive .. why change fuel filter and pump works fine . I have a 68 skylark 350-4

[@trailerparkcryptoking5213]

What is proper tension? 1-1/2 turns

[@UsefulEntertainment]

i just did it by feel to be honest

[@trailerparkcryptoking5213]

@@UsefulEntertainment FYI, I found a site that lists a lot of instruction sheets that come with carb kits and that particular setting is different for each carb and application, but for mine it ended up being 3/8 of a turn after lid contact. Every video on KZbin says 1-1/2 turns, I tried that and I don’t think it would even open with that tension....

[@trhester1958]

Good video and tunes! Thanks.

[@UsefulEntertainment]

Troy Hester thanks.

[@mashooga]

Oh thank God my secondaries weren't opening now I'm going to go out and try that little trick see if it works thank you oh and that's on my 1980 Chevy Blazer

[@UsefulEntertainment]

glad to help, ahh those blazers with the removable caps are the cats ass

[@mashooga]

@@UsefulEntertainment I take my lid off by April and don't put it back on until end of September sometimes October I love having my lid off. I did an engine swap and just did a transmission swap to a turbo 350 again have no problems in my carburetor in my secondaries opening so trying to get that fixed but I love my truck I have a newer Volvo but I love my truck

[@mashooga]

@@UsefulEntertainment oh I found the secondary problem for some reason the gasket is different but even when I put on the regular gasket I had to look at a problem so back at it again today

[@alexgoldstein7997]

Thank Bud! Great Video!

[@UsefulEntertainment]

Glad you liked it!

[@trhester1958]

One question, is voltage to the electric choke constant 12v? Does it just use ambient temp to adjust itself slowly open?

[@UsefulEntertainment]

Troy Hester yes it's constant, if the keys on it sends electricity to it to heat it up. as it heats up it opens, if the engine is cold & you leave the key on it will open eventually & when you start the car it will run like shit because the motors still cold & the choke is open.

[@juanpabloaguasolvera6209]

Donde se conectan las conecsiones de trasmision de Malibu 1980

[@MrShawnb21]

I'm having trouble with my Q-jet mixture screws. carburetor has been rebuilt cleaned but one side adjustment doesn't have any affect on the carburetor. Any idea what it could be?

[@UsefulEntertainment]

MrShawnb21 hmm. I honestly don't know. I'd try pulling the screw out and blowing air in there. maybe it's dirty or plugged up. That's kind of strange.

[@CHEVYK10]

what's the noise again

[@jasonsteiner57]

Gonna try this fix(When I got time!) I've been having this problem at WOT from a stop, but if I give it some gas then go WOT it's fine.

[@handleton2222]

Mine is operating as it should buy yet I still big down... I changed the 02, EGR, spark plugs, fuel filter, thermostat, air filter, battery, and it's idling high.

[@UsefulEntertainment]

Check for vacuum leaks. Spray around with carb cleaner

[@handleton2222]

@@UsefulEntertainment and whats going to happen? just the engine will bog out? or ?

[@UsefulEntertainment]

@@handleton2222 if you spray a vacuum leak, it will spike up in rpms

[@handleton2222]

@@UsefulEntertainment Thats fantastic. Sounds like an awesome experiment.... how exactly is this going to help me?

[@UsefulEntertainment]

@@handleton2222 you say its idling high, you can turn the idle down but if it is turned down and idles high you might have a vacuum leak causing it to pull in extra air.

[@MJ-sn4ue]

Thanks for the video.

[@jtturner2100]

To the front of the carb what is that vacuum line? Where does it go to? I have the same carb I jus don't kno where the line is supposed go and I'm think it's why it won't stay running

[@UsefulEntertainment]

Jt Turner I'm not sure witch vacuum line your talking about because there are a few on the front. If say if you are suspicious of a vacuum line in particular, plug it up so there is no vacuum leak and see what it does.

[@damianomarraffino6164]

Great video man

[@UsefulEntertainment]

thank you

[@mikeshanley335]

Maybe you could not have music cranking in the back ground, it would make it easier to understand you. Otherwise great video

[@Hrubeshomes]

Thanks guy really appreciate the video! You saved me a trip to the shop!!

[@UsefulEntertainment]

glad to hear man.

[@NoMatureContent]

Super helpful, thanks.

[@watsonlow22]

Good video & Thanks

[@lovebird299]

Thank you very much. Can you do a video for fuel air mix and choke?

[@UsefulEntertainment]

J Powell no problem. tell you what I'm going to be swapping a motor in my wagon in a few weeks, I'll try to make one when that carb gets swapped & tuned. what in specific are you looking for on the choke? and are you looking for how to adjust idle air mixture?

[@UsefulEntertainment]

i saw you were checking out whosaidtylers channel. luckily you stumbled on to the best quadrajet channel on youtube. id advise you to go through his qjet videos, there are more than I can count dealing from all the different types, constructions, how to fix / modify all the way to read the serial numbers. he has way more skill and experience than I do so im going to point you in his direction. hope you get everything straightened out with your car. his channel is very unique and a rare find. good luck

[@dennismillus4581]

What if it stays Locked Out. ?

[@UsefulEntertainment]

Might be warpd airhorn

[@tragicomni8502]

question what happens when the gas don't go to the carburator.

[@UsefulEntertainment]

Dylan Gomez sounds Luke a bad fuel pump. or clogged fuel filter. you are saying there is no fuel supply to the carb, right?

[@tragicomni8502]

corrct

[@tragicomni8502]

correct need your help on what to do

[@UsefulEntertainment]

Dylan Gomez ok, what kind of car and what year?

[@tragicomni8502]

It's a mobile home an 85 chevorlet

[@natevanlandingham1945]

I like the aluminum foil under the fuel filter!🤣🤣🤣

[@UsefulEntertainment]

yup, insulation lol

[@mikehooks1558]

barrel quad.choke plate stays open

[@67rs327]

excellent thanks

[@andrewdean9092]

why is it when I start my car it cut off then start it again cut back off I have is hit the gas pedal in hold it for a min to get it running

[@UsefulEntertainment]

Andrew Dean does it stabilize after a minute when it starts to warm up. if so your choke isn't working or its not adjusted right. anything more specific?

[@UsefulEntertainment]

Andrew Dean what car and year?

[@andrewdean9092]

1986 Chevy caprice

[@UsefulEntertainment]

Andrew Dean sounds like a choke problem. when's the last time it had plugs, wires, cap and rotor replaced? has the timing chain ever been replacrled? that's got a 305 right

[@andrewdean9092]

I replaced all of them 2 months ago

[@landreeagleton4198]

Harold. As requested, just reaching out to you on your Channel. I have a Rochester 4 Jet (7011108) that I need restored. You still provide the service.

[@johnmarking5588]

Peace Thanks.

[@Love1ifnotall]

Mine is doing the same thing

[@thomasdemarco617]

soorry didnt see rod

[@thomasdemarco617]

rod missing from dampener a no no

[@glennmanchester1568]

I'll trade you an 800 cfm that's on a motor and is running for that spare chevy 750 you got there

[@christopherohara3725]

The problem with the quadrajet is it not a Holly

[@tcapo514]

next time make your video without the music in the background GD

[@UsefulEntertainment]

You'll live

[@tcapo514]

@@UsefulEntertainment I am having that problem on my Quadrajet but it's not the secondaries. It's probably the 2 lead seals inside that are leaking. If so I'm going to take it apart and put some J-B weld on it after I rebuild it that seal those seals off.

[@JackJohnson-mc7ki]

Bow whoa whoa wu wu wu?

[@donniecowaan188]

🎉