Q: Engine occasionaly and momentarily completely loses power, especially at freeway speeds.
Engine completely loses power for a few seconds, usually at sustained high RPMs. Power loss, and occasional periods of low power and difficulty starting increase over time. Mechanic has replaced ignition coils 3 times in the last 5 years which fixes the problem - for a year or so. My question is, what is causing such a high failure rate? There must be an underlying problem that is creating this unacceptable, dangerous, and repeated failure. Thanks for your time!
My car has 70000 miles.
My car has an automatic transmission.
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
What others are asking
How do I break in the vehicle?
If you purchase your vehicle new, you will want to break it in. This means that you’ll drive differently (usually more conservatively) until the car is worn in and ready for usual driving. Here are a few things you should...
Crushed Oil Filter
Yes it could, the filter was designed for the thinner oil. Running the extra thick oil will starve your engine bearings of the necessary oil for lubrication. The thick oil will cause you to burn less oil due to the...
Noise and shaking after the car is put into gear, coolant light on
You'll need to check the coolant level before driving further. I would also have the mechanic check for a blown head gasket (which would cause the uneven running), and to make sure nothing under the vehicle is dragging. It is...
rattling noise
Hi there. The rattling to grinding noise, upon start-up, with a/c on could be, the air conditioning compressor (https://www.yourmechanic.com/services/ac-compressor-replacement) developing a bearing problem. It could also be, the a/c compressor is fine and the serpentine drive belt tensioner assembly (https://www.yourmechanic.com/services/drive-belt-tensioner-replacement)...
Got a Golf Mk4 and the battery died, now the EPS light is showing as well as a few other lights on the dashboard
It sounds like the alternator has failed. The alternator is used to supplement power to the electrical components and maintain battery charge. Once this fails, the electrical system will quickly show the signs of this failure. An alternator test by...
I get a check-engine light and Reduced power. Throttle not responding on hill climbs.
Hi there. The first thing to do is get a code reader and check the codes that the engine has stored since the engine light is on. This will give you a starting point and a place to check for...
When changing the car battery, do you "register" the battery to the car computer?
Hi there. Changing the battery has nothing to do with programming a battery. If the car was flat dead with a battery that lost all of the power because the dome light was on, then when jumped the vehicle will...
My car has service battery charging system chevy
This may be a sign of a weak battery, a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while...
Engine wont turn on when the bolt symbol is on
The lightning bolt warning light alerts you to a fault in the electronic throttle control system in your vehicle. This may be a faulty throttle body, the throttle body sensor or possibly the throttle body control motor which is what...
Related articles
The Most Common Error Codes for Transmission Problems
If your Check Engine Light has come on, there are a number of conditions that could be causing it. Many are related...
How to Buy a Good Quality Cylinder Head
The The cylinder head is one of the single most critical parts of your car’s mechanics, and one part that can trigger the most engine damage if it becomes compromised. The cylinder head, along with the head gasket, sits on...
How to Replace a Camshaft Position Sensor
Camshaft position sensors determine the position of the camshaft in relation to the crankshaft to control the fuel injector.
Browse other content
Services
Maintenance