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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  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: No spark on cylinder 1 and 4

Before considering the replacement of the PCM, return the coil pack to the parts store and ask for it to be tested. It is not uncommon to receive a faulted new part. Spark has to travel from the coil, through...

Q: Q: My car will not start

This could be a variety of things ranging from a fuel delivery problem to a no spark problem. The good thing is you know you are getting power to the starter if it cranks. Outside of this you will need...

Q: My 2001 Lincoln Continental misfires while idling.

You may have an engine vacuum leak causing the engine to have a rough idle. The most common cause may be the PCV hose leaking at the connection of the hose where it connects to the back of the intake...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.