Q: My engine and exhaust are pulsing when my car is at idle.

asked by on

I replaced the carburetor with a Weber conversion kit and after I did that it started idling rough. The engine and exhaust are pulsing. The air coming from the exhaust is choppy. What could be causing this?

My car has 120000 miles.
My car has a manual transmission.

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. An exhaust gas analysis would be needed to see if the carburetor needs different idle jets or just adjusting.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My engine and exhaust are pulsing when my car is at idle.

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: Q: Brakes noise

A scratching or scraping noise when hitting the brakes is the first sign that your brakes are worn out and may have hit "metal to metal", meaning there is no brake pad left and you need new brake pads. A...

Q: 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...

Q: Keyless entry problem

You can try to hold the lock and unlock button on remote to see if key will link up to car. If it links then you should be able to use it now. If still have issues then remove and...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.