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Carburetors

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Symptoms of a Bad or Failing Carburetor
Common signs include reduced engine performance, black smoke coming from the exhaust, backfiring, overheating, or hard starting.
How Long Does an Accelerator Pump Last?
If you drive a newer vehicle, you may not be familiar with accelerator pumps. New vehicles almost invariably operate on a system of fuel injection, and the accelerator pump is a component...
How Long Does a Carburetor Last?
The carburetor combines fuel and air in the engine by using an intake vacuum supply. The air is pulled down through to the carburetor by the intake vacuum while fuel is siphoned from...
How Long Does a Fuel Return Hose Last?
Most of the older cars on the market have a carburetor that helps to disperse the fuel that is need during the combustion process. While these carburetors are very reliable, there...
How to Tune and Adjust Your Carburetor
While all modern cars use computer-controlled fuel distribution systems, there are still many vehicles on the road that...
How to Check the Choke on a Carbureted Engine
The choke is a plate in the carburetor that opens and closes to allow more or less air into the engine. Similar to the throttle, the choke plate rotates from a horizontal to...
How Does the Carburetor Work Within the Fuel System?
The carburetor is responsible for mixing gasoline and air together in just the right amounts and getting that mixture into...
How Does the Fuel System Work in a Modern Car?
Cars have evolved a staggering amount over the last decade, and the biggest issue that manufacturers addressed with those advancements involves the amount of fuel used by the engine. Consequently, the fuel systems found...
How to Replace a Carburetor on Most Cars
A carburetor replacement involves the air cleaner, vacuum hose, car fuel line, and a number of other parts. This complex procedure varies by vehicle.
How to Buy a Good Quality Accelerator Pump
Nestled down in the carburetor’s fuel bowl is a little pump that provides extra sprays of needed fuel in situations like starting the car or passing on the highway. Fuel-injected vehicles do not need...
How to Buy a Good Quality Carburetor
Vehicles are now manufactured using a fuel injection system in order to provide the engine with the proper fuel-air mixture. Prior to the 1980s, however, carburetors performed this task. The carburetor is...
How to Buy a Good Quality Fuel Injector
Getting fuel directly to an engine is accomplished through an electronic fuel injector; with each cylinder getting its own dose of fuel which is much more efficient than the ways carburetors would...

Related questions

Question
Choose a carburetor for 454 Chevy engine
Hi there. For the carburetor swap out, you will need to have a least a CFM of 850 or 950 for a big block GM engine. If you are concerned about fuel consumption, then you could do a CFM of...
Question
Can I change my car from full injection to a carburetor?
Hi there. According to the emission department of the government, it is against the law to swap out a fuel injection system for a carburetor due to not getting a computer. If the vehicle was registered as recreational use only...
Question
Carburetor installation costs and adjustment.
Billing question sent to CS for installing and adjusting cost of a carburetor.
Question
Car will stall out at random while driving?
Hey there. While it has been some time since I worked on one of these early CCC vehicles, the first place I would look is the carburetor itself. If the vehicle idles fine but stalls or hesitates when hitting...
Question
Not getting enough fuel car will not run right. It stalls when you give it gas and stalls when it's running. It's a 1984 Ford Escort.
Hi there, thanks for writing in. Several early 80's Ford's swapped from carburetor to fuel injected engines; including your '84 Ford Escort. However, there were two different fuel systems available that year. If your Escort has the fuel injected engine,...
Question
Q: Engine bogs down
Hello there. Many common faults will cause your 1970 Chevrolet 350 engine to bog down. The most common faults are engine running to rich, improperly adjusted throttle linkage, fuel pressure to high, or a vacuum leak. A qualified technician, such...
Question
Q: car cranks but doesn't start
This engine will most likely have the old style ignition points and condenser. This type of ignition needs to be replaced every year or 12,000 miles or you will end up having no starts, hard starts or the engine may...
Question
Swapped carburetor and the engine stalls out.
Hi there. When you swap out carburetors on engines, you would have to set up the carburetor and adjust the float bowl along with setting the idle. With a Rodchester Quadra-jet, you would need to have the engine idle at...
Question
I have an engine with a two barrel carburetor. It appears to me the 2nd barrel isn't opening. When and what opens the second barrel?
Hi there. On two barrow carburetors, there are two ways that they open. The most common way is through engine vacuum. When the vacuum drops to near zero, the secondary throttle valve will open and operate the secondary jets. Other...
Question
Hi. I have a problem with my 86 regal. My 307 will shake and smoke a little every morning after the car has sat over night.
Hi there. It sounds like the needle and seat in the carburetor is not sealing off correctly and making the fuel drip over when the engine is sitting. Try pumping the throttle 2 times after you shut the engine off...
Question
Rebuilt 350 engine rebuilt Quadrajet carburetor with new computer. Nothing will connect to the computer, which is effecting my transmission.
Hi there. Check the wiring to the carburetor and see if the choke is coming on or staying off. The computer controlled carburetors are designed to meter the choke and fuel jets. If the wiring to the carburetor has power...
Question
My '65 F-100 lurches only when driven slowly.
Hi there. The symptoms that you are describing lead to the accelerator pump in the carburetor not pumping correctly at low rpm's and low speeds. Try adjusting the carburetor settings to be 100 rpm's higher and turn in the fuel...
Question
On cold start up it idles up to 2800 after a few min i tap the gas and it drops to normal 800 -1000 rpm idle speed
The fast idle speed on your vehicle should be 2100 rpm. The carburetor on your truck has a choke system that will increase the idle when it's cold, to help get the truck up to operating temperature a little more...
Question
My engine and exhaust are pulsing when my car is at idle.
Without knowing the exact setup done with the new carburetors I would suspect there is a carburetor setup issue and may need adjustments to the idle jets sizes since it may be running too lean or too rich at idle....
Question
'72 Mach 1 with 351C. Runs, idles, revs in park. Sputters, chugs and coughs in Drive. Any suggestions?
Check for proper advance of ignition timing. In particular, verify that advance curve you observe matches factory spec. Measure fuel pump output/pressure against factory spec. If engine compression is good and balanced, apart from timing check and fuel pressure check,...
Question
Getting fuel, getting spark, and won't start.
Check the ignition timing on the distributor and see if the timing is off. If the timing is good, then the accelerator pump in the carburetor or the fuel injectors are not working properly (if your vehicle has TBI injection)....
Question
Replacing plug on Carburetor
The plug is designed to prevent tampering although you should examine the plug to be sure it is not also intended to prevent the mixture screw from moving once the adjustment is made. If the plug is only "concealing" the...
Question
Can't get high revs from engine. Seems choked
Depending on the HEI system you have you may have a weak coil or the carburetor is running out of fuel at the higher rpms. Use a spark tester to see if the coil is capable of sustaining the spark...
Question
Holley 570 CFM for 454 engine
Going from a 350 to a 454 engine may require you to have the carburetor rebuilt to install larger main jets to get the engine to run good and have good power. A 650 carburetor would better suit the 454...
Question
My 86 ford ranger 2.0 single barrel carb . runs great . dies when let off gas .when turn throttle up on carb idles to high .
This problem is usually caused by the throttle damper out of adjustment on the carburetor that will cause the idle to be too low when you let off the throttle. It is supposed to lower the throttle slow instead of...

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