Should I rebuild carb?

[Jah]

What kind of mileage are you getting? What condition are your spark plugs, wires, dist. cap and rotor in? All these things can contribute to poor fuel economy. Why is it the first time it's been driven in a long time? Different wheels and tire sizes, as well as a potential trans or rear end swap can result in an inaccurate speedo, so if you keep track of your mileage via your odometer, it can throw off your calculations.

Try spraying it down with some carburetor cleaner or Seafoam and see if that helps.

Well, I baught the car and the engine blew the same day. I got it back like a week and a half ago but i've been doing things around here lately so haven't really been anywhere. All the spark plugs are new, and the wires under the hood are good. dist. cap is new.
I drove it like 2 hours to get it home after the engine swap and got a lot better mileage than this, but the car kept idling out and a friend messed with the idle screw on the carb and thats when i started getting horrable gas mileage. I tried to turn that back to where it was but i'm still not getting much better.
It really wasnt that good when i drove it back home, but it was a lot better than this. So i know its the carb thats causing the bad mileage, but I figure why just try to mess with that one screw if a rebuild can get me better mileage than what I got on the ride taking my car home?

 

[joeairforce]

The rebuild kits at NAPA are the best ones i've used.

Ok cool. How long does it take to rebuild a carb on average? This is my daily driver so I really can't have it out for long. And I dont have money to keep paying all this money for gas :shock:

I'd say probably 5-6 hours for a first timer (give or take)

Just pay close attention to where everything goes....

 

[Jah]

So, I got my job and should be getting my first check on the 30th. So I'll be going to the junkyard and buying a new q-jet. But since the dualjet 310 i have on my car isn't comp controlled (unless i'm really missing some wires) and I hear computer controlled ones get better gas mileage, what all do i have to snatch off the car in order to hook one up to my car?

 

[G_Body_Enthusiast]

just get a non CCC q-jet. they're not hard to find. its easier and cheaper to just swap out non CCC for non CCC.

that computer controlled stuff requires the brain and harness the distributor, knock sensor O2 sensor....its not worth it, trust me.

i'd give anything to get rid of this CCC nonsense and i will in due time...its more of a headache than its worth.

 

[Jah]

just get a non CCC q-jet. they're not hard to find. its easier and cheaper to just swap out non CCC for non CCC.

that computer controlled stuff requires the brain and harness the distributor, knock sensor O2 sensor....its not worth it, trust me.

i'd give anything to get rid of this CCC nonsense and i will in due time...its more of a headache than its worth.

Ok cool. Hopefully my distributor isn't computer-controlled either. I've been reading on it. As many things that's wrong with this car, i wouldn't be surprised. This gas mileage I'm loosing is ridiculous. I was going to go get a kit to rebuild this dual jet today, but my battery died... and i mean completely. Tried jumping it, and nothing.
Had to buy a whole new battery and there goes all the extra money I had. Good thing my job is like 5 minutes from my house. So I'll just wait to get a q-jet and buy a rebuild kit for that. Hopefully I'll get a lot better gas mileage with that.

 

[phaZe]

just get a non CCC q-jet. they're not hard to find. its easier and cheaper to just swap out non CCC for non CCC.

that computer controlled stuff requires the brain and harness the distributor, knock sensor O2 sensor....its not worth it, trust me.

i'd give anything to get rid of this CCC nonsense and i will in due time...its more of a headache than its worth.

Ok cool. Hopefully my distributor isn't computer-controlled either. I've been reading on it. As many things that's wrong with this car, i wouldn't be surprised. This gas mileage I'm loosing is ridiculous. I was going to go get a kit to rebuild this dual jet today, but my battery died... and i mean completely. Tried jumping it, and nothing.
Had to buy a whole new battery and there goes all the extra money I had. Good thing my job is like 5 minutes from my house. So I'll just wait to get a q-jet and buy a rebuild kit for that. Hopefully I'll get a lot better gas mileage with that.

If your Dual-Jet is that bad off than you probably will get better gas mileage, but if you throw a Quad-Jet in you will be using more gas and getting more power, but like I said...if you're going through that much gas with just a Dual-Jet there has to be a problem with that Carb.

 

[Jah]

just get a non CCC q-jet. they're not hard to find. its easier and cheaper to just swap out non CCC for non CCC.

that computer controlled stuff requires the brain and harness the distributor, knock sensor O2 sensor....its not worth it, trust me.

i'd give anything to get rid of this CCC nonsense and i will in due time...its more of a headache than its worth.

Ok cool. Hopefully my distributor isn't computer-controlled either. I've been reading on it. As many things that's wrong with this car, i wouldn't be surprised. This gas mileage I'm loosing is ridiculous. I was going to go get a kit to rebuild this dual jet today, but my battery died... and i mean completely. Tried jumping it, and nothing.
Had to buy a whole new battery and there goes all the extra money I had. Good thing my job is like 5 minutes from my house. So I'll just wait to get a q-jet and buy a rebuild kit for that. Hopefully I'll get a lot better gas mileage with that.

If your Dual-Jet is that bad off than you probably will get better gas mileage, but if you throw a Quad-Jet in you will be using more gas and getting more power, but like I said...if you're going through that much gas with just a Dual-Jet there has to be a problem with that Carb.

:shock: Using more gas?! That pretty much means I would have to fill up my tank just to go to the gas station!
This dual-jet is sucking as much (if not more) than my friends F-350. And I know that isn't supposed to be happening. Hopefully I don't have to take my car far for any reason... I would try to tune it but i cant find anything on tuning a dual jet and I'm scared to make it worse trying to figure it out myself.

 

[phaZe]

Throwing a Q-Jet will probably help you out. That Dual-Jet sounds like it's not doing the job.

Changing out the air filter can help too, if it hasn't been done in a while.

What type of engine is this, by the way?

 

[Jah]

Throwing a Q-Jet will probably help you out. That Dual-Jet sounds like it's not doing the job.

Changing out the air filter can help too, if it hasn't been done in a while.

I changed the air filter a few days ago, so that's not it. I just noticed an oxygen sensor not hooked up to anything. A does a non-computer controlled carb use an oxygen sensor? The wire coming from it is not hooked up to anything, and doesn't reach the carb or distributor. Not even close... Where is this thing supposed to be hooked? Its on the driver side.

EDIT:
Its a chevy 350. And i'm actually not sure if its an O2 sensor or not... Looks like the wire is too thin to be an o2 sensor.

 

[phaZe]

Don't take my word for it, but I've never heard of an Oxygen Sensor on a non-computer controlled car. The Sensor is there to tell the computer to adjust the mixture.