Skip the auto shop - Our mechanics make house calls

Q: Misfiring. Changed the fuel pump and the plugs

asked by on

My car is misfiring. I changed the fuel pump and the plugs it is still misfiring. they diagnosed it with the computer still nada... I am so perplexed... What can I do?

My car has 144689 miles.
My car has a manual transmission.

A: Hi there. It depends on what type of digita...

Hi there. It depends on what type of digital scanner you’re using, but most professional scanners will be able to see the misfiring cylinder on the scope while the engine is running. This will typically also indicate which electrical sensor or ignition system component is causing the engine misfire. Without being there to examine your vehicle, it’s difficult to give you some potential ideas, but you might want to inspect the ignition coil or distributor cap to see if it’s cracked. You may also want to contact a professional mechanic to complete an engine is misfiring inspection on site.

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

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: Broke spark plug while trying to take it out

Hello. You will need to have the vehicle taken to a mechanic that has the special tool to get the broken plug out (maybe). I say maybe cause the tool may not get out the broken pieces and the cylinder...

Q: Repeated Fuel Injector Seal Failure

O-rings on fuel injectors have to be liberally lubricated with engine oil prior to installation. Installation is typically made with a twisting motion as you push the injector into the bore on the fuel rail. Be sure the aluminum surface...

Q: Check Engine Light is on and transmission problem

Hello, What you are describing sounds like a transmission that may be low on transmission fluid or potentially have some internal component problems such as a faulty solenoid or bad control module. When the transmission is not functioning properly, this...

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 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...
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...