Skip the auto shop - Our mechanics make house calls

Q: 1985 Chevrolet Chevette hard to start when cold

asked by on

My car won't idle. And it's very hard to start when cold. I believe it has no fuel left in the carburetor after sitting overnight. Recently, it continued running after shutting it off and then banged a bit. I believe the electric choke, timing, or vacuum may be at fault. This engine is installed in a 1929 replicar that I have just put 11,500 miles on without any trouble. It has always been garaged.

Hello. It sounds like the carburetor is not closing completely. This could cause the poor idle, hard starting and "dieseling" you are experiencing. The 6510-C carburetor you have uses and electric choke, which could definitely be the problem. It also has a stepped speed control system (SSC) which consists of a vacuum operated actuator that opens the throttle. The problem could be in this system too. I am far from an expert on carburetors, since they were phased out by the time I started my career. However, YourMechanic does have carburetor experts on hand who are ready to help you inspect your vehicle’s hard-to-start condition.

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
  1. Home
  2. Questions
  3. 1985 Chevrolet Chevette hard to start when cold

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: I'm rebuilding my quadrajet and the new accelerator pump is too small around for the hole so it won't seal. Is there another piece

If the clearance is VERY small, depending on the cup material gasoline may cause enough swelling to form the seal. There are no other seals if you have an already assembled pump in the bore. It would not be unusual...

Q: Truck has a slight shake at idle in park or in drive at a stoplight

Hello, thank you for writing in. The vehicle is likely having an issue with one of its three main components: air, fuel, and spark. Most vibrations and shaking come from a misfire of some kind. You will want to check...

Q: Carburetor problem

The carburetor needs a good supply of fuel to keep the engine running; if the fuel pump is not suppling the fuel, or the filter is clogged solid, then fuel cannot get to the carburetor. If fuel is getting to...

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.