Skip the auto shop - Our mechanics make house calls

Q: Carburetor backfiring and won't hold cold start.

asked by on

The carburetor is backfiring and won't hold a cold start fast idle. Other problems include carburetor leaking, wet throttle plates, bowl levels would drop overnight.

A: Hi. It sounds like you are having some carb...

Hi. It sounds like you are having some carburetor problems. Im going to guess you have a Holley or a Edlebrock. They both have been known to have many problems. I finally decided to get rid of my Holleys and obtained a Dominator, I have been relieved ever since. Your problem sounds like the needle and seat may have something stuck in them causing them not to seal off correctly. As a result, your fuel bowls are flooding the carburetor with fuel. At the same time, your choke might not be set correctly and may be stuck closed causing further flooding. I would recommend having a certified technician inspect what is causing your carburetor malfunction. Also, if it has sat for a while, you may be better off having the carburetor replaced by a certified mechanic to eliminate any further problems with your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How to stop gas leakage from going into carburetor

Hi there. The excessive fuel into the carburetor would account for not being able to drive very far and heavily smoking from the exhaust. Two things come to mind, a sunk carburetor float(s) and/or float needle & seat not sealing....

Q: I need to know about gas & oil additives.

If you still have original heads and with factory valves and valve guides then you will need to run fuel additives to help with the lack of lead in the fuel to lubricate and cool the valves. Running synthetic oil...

Q: Service ABS/Traction control/Active Handling messages on DIC

Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this information constantly to the ABS and traction control system which are controlled by the car's ECU. When the ECU...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...