Skip the auto shop - Our mechanics make house calls

Q: Car is idling rough - 1983 Jeep CJ7

asked by on

When I start the car and drive, it runs fine while I'm accelerating. At the moment when I apply the clutch and the brakes, it sounds as if it would stall. During idling, it doesn't stall out, but it's very rough. The issue is even worse If I brake hard. I went to the mechanic and he had the fuel pump and carburetor replaced with new parts and repaired the valves. The problem is still there, but the performance has been slightly improved. What else can I do to fix this?

Hello. This behavior sounds like the power brake booster has a leak or rupture, which acts like an air leak to the engine. Since the brake booster vacuum is generated by the engine’s air intake, their functions and potential problems are interconnected. This could be causing the "near stall when braking" as you describe. I recommend having a professional mechanic, like one from YourMechanic, diagnose the rough idling issue and replace the brake booster if necessary.

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: Cylinder 2 misfire

You need to pull out the coil and check to see if there is oil in the spark plug hole, or on the plug wire boot. If there is, then replace the valve cover and spark plug boots after cleaning...

Q: What size socket do I use to change the brakes for a 1983 Brougham Motor home.

Hi there. Unfortunately, we are only able to offer repair tips and advice on consumer cars, light trucks and SUV's sold in the United States. I would recommend searching online for repair instructions or a service and repair manual for...

Q: Front brake gets locked up - 1983 Jeep CJ7

Have the residual pressure valve for the locking brake checked for problems. Residual pressure valves maintain a very slight hydraulic pressure for each brake in order to make the brakes more responsive when you press the brake pedal. If it...

Related articles

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...
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.