Skip the auto shop - Our mechanics make house calls

Q: I changed the coil pack spark plugs and plug wires my car still runs bad why

asked by on

My car runs bad when I changed the plugs plugs wires and coil pack I don't understand why still doin that

My car has 89000 miles.
My car has a manual transmission.

A: If the engine is running bad then you shoul...

If the engine is running bad then you should be getting a code set in the computer. If not, then a scanner should be used to view data to see if the engine is running lean or rich. Check the intake tube between the mass air sensor and the intake throttle body for any leaks. Clean the mass air sensor and monitor it to make sure it is reading the correct barometric pressures. These sensors are known to not give the correct barometric pressure for the altitude you are at.

I'd suggest you get the car inspected by a certified mechanic who can diagnose your rough running symptoms and make the necessary repairs to get your car running smoothly again.

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・Save up to 30%

Get a quote

What others are asking

Q: Car stalling when turning on the AC.

A stalling vehicle when the AC or Defroster is activate indicates a problem with the compressor. It is either seized/hard to rotate or the AC refrigerant is overcharged preventing the compressor from turning. This will also put increased load on...

Q: What factors affect satellite radio reception in a 2012 Ford Escape?

While your satellite radio (if equipped) isn’t affected by as many factors as the AM and FM bands, there are a few things that you should know: Hills, buildings, tunnels and even metal roofs (like those at the gas...

Q: Over heating and heater blowing cold

Hi there: It's more than likely that you have either an obstruction inside your heater core or a restriction of coolant that is not allowing the entire cooling system to work correctly. The heater core receives hot coolant from the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control 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...