Skip the auto shop - Our mechanics make house calls

Q: Sputtering when going uphill. Changed spark plugs and could and now worse

asked by on

Truck sputters and shakes when accelerating uphill. No engine light or codes...Changed spark plugs and coils now worse and engine light blinking

My car has 92000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. Starting with checking the spark plugs is a great idea, as these are typical symptoms of spark failure. Although the check engine light was not on before, it is now, and there are likely diagnostic codes to check. Start by having the vehicle re-scanned. Use the information to help diagnose the issue. Typically a faulty fuel pump, or clogged fuel filter can also cause these issues. You can check the fuel pressure with an in-line gauge if needed. There are some sensors that will also cause issues like this. Typically the check engine light and a diagnostic scan will reveal these types of issues. For more help, contact our service department.

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!
  • Home
  • Questions
  • Sputtering when going uphill. Changed spark plugs and could and now worse

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: How difficult would it be to replace the catalytic converter on my 1997 Chevy Blazer?

Hello. If the exhaust system is original, that is if it is about 20 years old, you will probably end up replacing the entire system, consisting of the "Y" pipe coming off the manifolds, the converter, muffler, and tail pipe....

Q: Brake fluid was recently bled/flushed and the brakes still feel like they are grinding

Good question and thank you for the details. I want going to go through some things you may want to check and hopefully save you some money. If you come across a problem in any of the areas you will...

Q: 2011 f150 ecoboost 3.5 overheating while towing 6500 lbs trailer up parleys, what could the issue be? Instantly cools when off gas

Hi there. You are correct in assuming that many turbo-powered F-150's have issues with intercoolers wearing out - especially when they are put under significant loads and hill climbing as you've described. To be honest, most automotive manufacturers never assume...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...