Q: Loss of power

asked by on August 02, 2017

My car was driving perfect untill i parked it for a couple months. When i went to drive it i noticed that my car was hesitating every time i went to acceletate. After about 10 mins i decided to give it a nice amount of gas and try to take off fast as soon as i did a huge cloud of grey and white smoke came from the exhaust but it only lasted for a min and quit smoking. Ive continued to drive it a little and will only smoke a lil if i push on the accelerater hard enough. Has a huge amount of power loss though doesnt like taking off or maintaining high speeds. I had a check engine light check done at auto zone they told me bank 2 o2 sensor was reading bad i went to replace it and noticed that the pigtails connected to the sensor was not conected and looked cut. I was also unable to get the o2 sensor out and still have not replaced it but the car is currently sitting. Im wondering how long its been lilke that? If it could be just the o2 sensor or if its clogged the catalytic converter?

My car has 200000 miles.
My car has a manual transmission.

Hi there. Honestly, your acceleration issues could be a combination of bad O2 sensors (upstream and downstream), faulty electrical harness or connections and the catalytic converter being clogged or worn out. It’s also possible that fuel system components are dirty or need to be replaced as well. To know for certain, the best advice we can offer is to have a professional mechanic complete a car is slow to accelerate inspection at your location.

Was this answer helpful?
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

Get a quote

What others are asking

Reverse lights don't always work 1994 Mazda MX6

Hi - most likely the reverse light switch is working erratically. It is mounted on the gearbox, and is subject to vibration as well as oil on the switch contacts. I recommend a reverse light switch replacement by a mobile,...

My mustang keeps dying.

Hey there. There is a fuse in the fuse junction box within the engine fuse box that needs to be checked. It is a 20amp fuse. There are two fuse link wires that go from junction box to the alternator....

What would cause 2 main computers to be bad within 6months

This does sound like a very frustrating experience. Unfortunately it is difficult to pinpoint exactly what is causing your computer to go bad without knowing what kind of computers have been installed in your vehicle. Aftermarket, used or refurbished...

Related articles

Mercury Certified Pre-Owned (CPO) Car Program
Drivers Drivers who are shopping around for a used Mercury vehicle may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
Understanding the Mercury Intelligent Oil Life Monitor and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Mercury Intelligent Oil Life Monitor indicates when and what service your car needs.
A Buyer’s Guide to the 2012 Mercedes-Benz CLS-Class
The The newly redesigned 2012 Mercedes-Benz CLS-Class has transformed it from a more practical and elegant vehicle to one that is noticeably sporty with a bit more aggression. Designed for the affluent who want both performance and sophistication, while also...