Skip the auto shop - Our mechanics make house calls

Q: 1990 Volvo 740 idles roughly

asked by on

The car has a turbo engine. It has been idling very rough. The RPMs would erratically increase and decrease. I had a new head gasket installed. I replaced the spark plugs with new ones as well as the spark plug wires, rotor and cap. It sometimes feels as if the car would stall. I had the vacuum lines checked as well. Do you have any suggestions?

A: Hi there, thanks for writing in about your ...

Hi there, thanks for writing in about your 1990 Volvo 740. The symptoms sound similar to a vehicle suffering from a boost leak or electronic air metering and fuel delivery faults. The vehicles do not have the new OBD-II ports, but our technicians are equipped with factory service instructions to retrieve trouble codes. Avoid an unsafe situation by continuing to drive. To have this resolved, consider having a certified mechanic, such as one from YourMechanic, inspect the rough idling problem in order to have this properly fixed.

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・Save up to 30%

Get a quote

What others are asking

Q: Pistons with spark issues

Hello there, a few different components can cause the engine to lose spark. It could be a fouled or faulty spark plug, distributor, or a wiring issue. I recommend having a qualified technician, such as one from YourMechanic, come to...

Q: Car overheating

You still could have a blown head gasket. Sometimes the compression blows into the radiator. A mechanic can check to see if pressure is pushed into the radiator from the engine having a blown head gasket or a cracked head....

Q: Hood and bumper detaching

I think your best bet is to have someone visually inspect the car in person. It may be caused by loose hardware, or it could be warping plastic. I believe a body shop would be the best place to go...

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.