Q: Car sputtering and rough idle

asked by on February 11, 2018

Today I replaced my spark plugs, spark plug wires,ignition coil, fuel filter and my canister vent valve solenoid. After replacing these, upon start up it rough idles and sputters pretty badly. When Just siting after that it’ll rough idle occasionally and it makes a spitter noise. It never did this until I replaced these parts. What could it be and how can I fix it?

My car has 80000 miles.
My car has an automatic transmission.

It appears you may have damaged one of the spark plugs putting it in or one of the parts failed. You will need to have the computer tested for codes to see i it stored a failure code for one of the plugs, wires or coil.

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

How do you remove the torque converter bolts off the flywheel? 2005 GMC Envoy Denali

Hello - with the vehicle safely supported to provide clearance underneath - in between the engine oil and transmission pan, there is a large, funnel-shaped aluminum casting (called the bellhousing), that physically mounts the engine to the transmission. At the...

how do you know if a car is vapor locked and how do you fix it?

It is very unlikely that a fuel injected engine is vapor locked (even at 108 degrees). From experience, an electrical component failed based upon heat and mileage of the vehicle. A code scanner will likely lead you to the issue....

Transmission fluid smell

Depending on whether or not any fluid was spilled or if you have a leak somewhere, this may cause the car to smell a bit like transmission fluid. Assuming you did not spill and you do not have any leaks,...

Related articles

2012 Ford Focus vs. 2012 Mazda 3: Which One Should I Buy?
Compact sedans and hatchbacks provide a great ride on a budget, with the evolution from a stodgy, unattractive exterior (and interior!) to a more fully-featured trim set and exterior design. Driving enjoyment is improved throughout the class, which are known...
2007 Nissan Versa vs. 2007 Saturn Ion: Which One Should I Buy?
Compact cars as a class are generally meant to be commuter vehicles: with excellent gas mileage, an entry-level price point, and decent safety ratings for those who are on the road the majority of their time. These cars also make...
A Buyer’s Guide to the 2012 Ford F-350
With With Ford’s stiffest chassis to date, the 2012 F-350 is one of the most reliable heavy-duty pickup trucks on the market today. With the quiet cabin and plush ride, though, you’ll feel like you’re driving in the comfort of...