Q: Car takes longer to start, shakes, idles poorly & does not accelerate well going uphill. Check engine light is on.

asked by on

I gathered from online forums that the ignition coil pack maybe faulty. We had a tune-up & had this pack plus the spark plug & wires replaced 5 years ago when we had CEL associated with misfire. This time, I noticed there are tiny sparks coming out of one corner. Does it need to be replaced again? Or something else is the problem? How much would this cost me?

My car has 126450 miles.

The symptoms you describe definitely sound like a severe engine misfire. This is likely related to the coil since you have obvious signs of failure (arcing from the side). I recommend having a qualified technician, such as one from YourMechanic perform an inspection of the car’s starting issue, Check Engine Light, and shaking problem. The technician will then be able to determine the exact failure, what parts need replaced, and a complete estimate for the repairs. If you choose to book the appointment with YourMechanic, the initial inspection fee will be credited towards the repair.

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. Car takes longer to start, shakes, idles poorly & does not accelerate well going uphill. Check engine light is on.

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: My 2013 Subaru XV will not move after changing the fluid in the transmission.

Hello. If the fluid was simply changed and if it is at the correct level then this should not occur. If you used the wrong fluid then that can cause this. It can also occur if the computer was not...

Q: When the car is cold and first starting, the serpentine belt seizes up temporarily.

Hello. A belt that seizes up during cold starts can be caused by a few things. If one of the pulleys is seizing up, it can cause the belt to squeal as it passes over the stationary pulley. I would...

Q: Repeated Fuel Injector Seal Failure

O-rings on fuel injectors have to be liberally lubricated with engine oil prior to installation. Installation is typically made with a twisting motion as you push the injector into the bore on the fuel rail. Be sure the aluminum surface...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...