Skip the auto shop - Our mechanics make house calls

Q: At what mileage should your plugs be changed ? 2008 Cadillac STS

asked by on

My 2008 STS just started experienced rough acceleration accompanied by flashing check engine light. Over 163,000 miles. Should I change spark plugs?

Hi there - first step is to check the problem codes causing your Check Engine light to come on and go back off. Most auto parts stores will do this for you for free on a "time-available" basis. If you still have the original spark plugs in your engine, it’s a safe bet the plugs are shot. They should be changed at 100K mile intervals at least. I recommend a engine misfire inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Have a 06 cadillac sts need to find out what rotors will fit with 07 cts v brombo calipers

Hi there. As much as we'd like to help you here, unfortunately we don't offer non-OEM alternation recommendations. I think your best option here is to speak with an aftermarket brake system manufacturer to seek their recommendation on application. Best...

Q: Joshua how much will it cost to replace all coils and plugs

Hello, thank you for writing in. The technician's do not have the ability to create proper quotes due to the pricing of labor and parts being dependent on your location. With that being said, I can share some of the...

Q: Starts runs for 30 sec. Shuts down.

Hello. This behavior suggests that the carburetor needle & seat are sticking, and the carb requires some adjustment and/or a rebuild. These fuel valve components allow fuel pressurized by the fuel pump into the carburetor float bowl (and from there...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...