Skip the auto shop - Our mechanics make house calls

Q: Car running rich

asked by on

The car is running rich. Carbon-fouled spark plugs are all dark black and smell like raw fuel in my garage.

It can always be a challenge when addressing an issue with a classic car, such as with your 68’ Chevelle. Provided that your Chevy has not been modified, your problem may simply be found in the spark plugs. Each spark plug is designed with a specific purpose and some spark plugs run hotter while others run colder, depending on engine needs. Switching over to a hotter spark plug may clear up your Chevelle issues. However, it is also a possibility that the carburetor needs to be serviced or adjusted. In order to be 100% certain, I would recommend enlisting the help of a certified mechanic to come by and inspect your Chevy. They will have the knowledge necessary to identify why your Chevelle is running rich as well as make the necessary adjustments or repairs to keep your Chevy on the road.

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

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: Blowing oil through valve covers.

Hi there. Check the positive crankcase ventilation valve (PCV) and see if it's plugged up. Also, check the engine oil and make sure that there is the proper amount of oil in the engine. Too much oil or a sticking...

Q: How much does it cost to replace spark plugs on a V6 engine?

Billing question sent to CS for the cost to replace spark plugs on a V6 engine.

Q: 4 wheel drive not working properly!

Hi there. Obviously the best course of action is to have a professional mobile mechanic come to your location and complete a four wheel drive inspection; however, at first glance, you might want to check the wiring harness that supplies...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...