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: How could I fix my strategy code FBJR2G3 on my 2005 mustang GT.

There should be a 1-800 number to call the SCT tuner people with questions. Not all tuners will work with every model of engine and computer strategy. The Engine Control Unit (ECU) program from the factory is saved in...

Q: There is a rattling noise coming from my exhaust when my car is idling.

Hello, the exhaust system noise can be created from a heat shield (light tin type sound). Rattling could be from a hanger which support the system. A muffler and catalytic convertor can internally make a rattle type noise. The vehicle...

Q: 1. Car jerk 2. Battery

The jerking reaction may be related to what is known as the mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.