Q: My truck keeps giving me the cylinder #8 misfire code

asked by on

I have a 1997 chevy k1500 it has the 5.7 vortec in it i recently replaced the injectors the fuel filter and the fuel pump. I also replace the distributer cap and rotor. The problem i am having is it keeps giving me the fault code for miss fire on cylinder #8 im really not sure what to do now. The truck still runs pretty good but the check engine light flashes and gives me that code.

My car has 202500 miles.
My car has an automatic transmission.

Hello. A continuing misfire on #8 suggests a bad plug wire, a bad spark plug, or possibly oil leaking down onto the #8 plug, shorting it out. Also, if one plug wire is bad, replace them all. Given your mileage, you should be looking at the plugs also. To have this resolved, I recommend having a certified professional, like one from YourMechanic, diagnose the misfire in person to have this corrected.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. My truck keeps giving me the cylinder #8 misfire code

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: Bank 1 air fuel imbalance alarm car is misfire after it gets hot ok up till that time

Hi there. Check the spark plugs and see if the plugs have a good bold spark. If the plugs are not sparking, then either the plugs are fouled out or the ignition coils are not energizing. Check the fuel injectors...

Q: My Jeep is flooding itself out after shutting it off and starting it back up

I would check the coolant temperature sensor, which is an input to the fuel injection. If it has failed and is sending the engine an incorrect temperature reading, the engine will get too rich a fuel mix and will be...

Q: How much dose it cost to have the fuel filter replaced on my 2009 town and country mini van?

Billing question sent to CS for the cost of replacing the fuel filter on a 2009, Chrysler, 300 - town and country mini van.

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.