Skip the auto shop - Our mechanics make house calls

Q: Car has rough idle and ticks.

asked by on

Cylinder 1 has low compression and the engine needs to be rebuilt. The engine also idles roughly and has a ticking sound while accelerating.

A: If the engine has low compression on one cy...

If the engine has low compression on one cylinder it is usually an indication of a damaged valve seat or possibly a bad head gasket. If it is also accompanied by a ticking noise then there may be an issue with the valve train also. If you already need an engine rebuild it will take care of these other noises that you are getting.

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

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!

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: No crank - 1995 Chrysler LHS

Hi there. Your vehicle's no crank needs to be properly diagnosed. There are several possibilities for a no crank situation, such as a faulty ignition switch, a faulty starter relay, a faulty neutral safety switch, and faulty electrical connection(s) anywhere...

Q: I have an aftermarket intake and it's reading 4.9 psi. Is that good or bad?

Hi there. An intake manifold should read 19 to 22 hg. This is 19 vacuum to 22 vacuum. If you are getting a psi reading, then there is either a turbo on your vehicle or the engine timing is out...

Q: My car cranks and seems to fire once but won't start - 1991 Toyota Tercel

Hi there. From the description you have provided, these symptoms need to be properly diagnosed. Replacing parts, without diagnoses, can be expensive and time consuming. Assuming the engine is mechanically sound, the description you provided about the spark plug condition...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...