A Discussion About The Choke on a Four Barrel Rochester Carburetor

[midnitesquirldog]

i have 7 of those carburetors they are a pain in the neck to get exact that's why gm used holley on there performance engines holley is good edelbrock carbs are better.

[sajan67]

@midnitesquirldog

I tried send you a message, but since you have to add me as a contact first...

You said you have 7 pain in the necks... I could help reducing your pain, if you have some '86 or newer...

[midnitesquirldog]

@sajan67 i have a 1970 buick gs 455 carb 1 1970 cadillac 472 carb and the rest are 305 350 chevy 84 -1989 carbs

[sajan67]

@midnitesquirldog

I've sendt a friend request. Better to continue this by messages...

[sajan67]

No I don't have a divorced thermostat, its on an '86 olds. And i know there is no vacuum to the choke itself, only to lift the choke plate so its not flooding. As soon as the engine starts there will be vacuum and then a diafragm releases the coldstart funtion and the plate opens a dimes with.

[sajan67]

It's not the thermostatic spring that opens up the plate so it doesn't flood, it's the vacuum after the engine starts!

But still a good video!

I wathced a few, because i have some trouble with my carb... seems someone not knowing what they were doing has don some fixing...

I'm starting to understand this carb now, so now i will try to get it right!

[TheYoshiClan]

@sajan67 You're thinking of the heat riser. It runs on vacuum. It closes when the engine starts if its cold, and then opens once it warms up. The choke on this carburetor does not run off any vacuum supply. The thermostatic spring does unwind allowing the choke plate to open while the engine is warming up. The choke setup on this carburetor is purely electronic. If I pull the pigtail to it, it will flood. If I pull all vacuum to the carb the choke will work. Next Comment

[TheYoshiClan]

@sajan67 Your Carburetor may have a divorced choke, if it does then yeah yours probably runs off of a vacuum source, while mine does not.

[sajan67]

@TheYoshiClan

I tried to answer from my phone earlier.. Turns out the answers ended up as comments instead...

Well, if you look at this video ( youtube dot com /)watch?v=MzCEcrj6aMM&feature=­related

skip ahead to 7.03, because he talks too much :-P

But he shows you what i mean. The TECHNICAL term he's trying too hard to find is "cold start release" i think.

[chevguy350]

a normal guy would get in the car pump the gas a couple times. then turn the key... smh

[auaiao9]

@chevguy350 some of us like cranking vids.

[7233910]

Hello good sir. I have an edelbrock electric choke carb. I'm having problems with the choke and I do not have the original air cleaner housing with the heat riser. Is this a problem? Thanks

[mgmez456]

Thank you good sir.

[CS198687]

i have a 210 quarter jet carb inside my buick regal 4.9 catalina pontiac motor when i press the gas or throttle gas comes out and i hear the air noise is my carb bad or what. when i drive it hesitates and then it picks up speed what the is going on do i need a new carb or what

[BRutAL42Zero]

hey! my 91 camaro has a four barrel and after i drive it some and stop and try to re crank the car it takes a good while to crank it. and sometimes it will start stalling and die going down the road is this the problem with it??? it has a 383 engine

[psychopathicRyda1991]

hey yoshi hope you can help me my carb is fine (three pumps and turn key )but after it warms up and driving for 10min it starts rough idling and appears to want to stall any idea?

[AllegJDM]

@TheYoshiClan Hello sir, Im going to try to help labartino1 out. He is my dad and doesnt know enough english to understand you in the video. What happened is that he took the car to get carburetor cleaned and now that he got it he has an issue with the choke plate. It seems to be open at all times which wont let him start up the car. He needs to pump it a lot b4 he gets it going. however i cant understand what is it that you do to get this plate to shut. can you explain please?

[crankitandfloodit]

welll we like watching women having trouble starting there old carburated cars  and swearing at them hehehehehe

[labartino1]

Quiero enviarte unas fotos de mi carburador antes de la limpieza y despues de la limpieza con kit nuevo, para que veas la plaquita como quedo, esta en posicion vertical, enviame tu correo.

Gracias, Caracas, Venezuela

[labartino1]

Hola amigo

Gracias por contestar mi carta.

Excelente tu video pero no lo entiendo.

Tengo un auto Chevrolet Malibu 1981, motor 231 V6, sedan 4 puertas, y carburetor Rochester Dualjet 210.

El problema que tengo es que el motor no me prende en FRIO y despues de 4 aceleraciones al pedal logro prender el auto, y cuando esta caliente el motor funciona perfectameente.

En tu video se ve que la plaquita esta en posicion vertical y el auto no lo puedes prender. mi correo es jpizarro0109@yahoo.com

[labartino1]

Alguien me lo puede traducir por favor, porque creo que este problema lo tengo yo con mi carburador rochester dualjet 210 que no me prende el motor en frio.

Ayuda please!!!

[TheYoshiClan]

@labartino1 Youre going to have to help me out here bud, my Spanish is rustier then my old Cutlass. You have a car with a duel jet 210 carburetor, if heard of the duel jet but the number I never heard of. ¿Qué coche usted tiene? Qué problema con el carburador es usted que tiene. ¿Qué el coche está haciendo? I hope you can piece that together...Envíeme un mensaje con toda la información. Send me a PM - Yoshi

[AllegJDM]

@labartino1 Pa soy yo le voy a decir al senor que te lo voy a traducir ok.

[thestuffz]

okay that makes a bit more sense. if it wasnt snowing a ton of snow right now id do a video tomorrow. Ill have to check to see what the plate is doing. When i first got the car it started no problem. then the more i drove it the worst starting and running got. I took it to a garage that a friend of the family works at to get it cleaned out. he has done lots of work on our fleet of cars and trucks but nothing this "like new" as my car is.

[TheYoshiClan]

@thestuffz Youre getting snow right now, all the snow melted here today. Vacuum leaks and worn out spark plugs maybe a leaking spark plug wire is to blame if the car doesn't run good on the highway. If you do have to adjust it, dont send the car in, I know the small shops around here charge 70 bucks to adjust the choke. Notice fuel went up again eh? How much is fuel where you are must be over 6 bucks a gallon now.

[thestuffz]

@TheYoshiClan yup its coming down hard. was forecasted 6 inches over night. might get 2 feet now it sounds like. its just fricking miserable out.. snow was almost gone to!. ya the mileage when i first got it was very very good. was doing almost 30 on the highway and now its down to about 20 (well thats what i got last year to rushmore and back). fuel is 1.229/liter (4.67/us gallon)