Q: After a radiator change, My car is shaking and emitting black smoke. What could be the cause? 2000 Volvo S80

asked by on

I car hit a stone and the radiator broke. the car was shaking after that happened so I parked it and a radiator change was done. A few days after the radiator change, the car is shaking again when it's idle, and emitting black smoke. What could be the cause?

My car has 312633 miles.
My car has an automatic transmission.

Hello, your symptoms suggest a coolant temperature sensor failure, or wiring problem (cut wires or other "open circuit" issues). Changing the radiator may have caused the sensor to be bumped, or the wiring for this sensor to be damaged. An open circuit for this sensor would send engine management a signal for "very cold conditions", requesting a rich fuel mixture - resulting in rough idle, and black smoke from unburned fuel. I would suggest a engine sensor inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. After a radiator change, My car is shaking and emitting black smoke. What could be the cause? 2000 Volvo S80

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: Is the squealing noise in my car caused by the power steering fluid or the power steering pump?

As you may know, your car's power steering pump is operated by a belt driven pump that hydraulically assists with your steering. When this pump is low on fluid or subjected to an abnormally excessive load, this may cause the...

Q: What does the Low Temperature indicator mean on the dash?

While you’re probably familiar with the High Temperature light on the dash, you may not know what the Low Temperature indicator means when it comes on. This light simply tells you that the coolant temperature is low, or cooler than...

Q: Transmission jerks

This kind of reaction is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.