Skip the auto shop - Our mechanics make house calls

Q: Code P0308 - 1997 Chevrolet C1500

asked by on

I replaced my spark plugs and also the spark plug wires and they are in the correct firing order but this did not solve my cylinder 8 misfire issue. What steps should I take next to repair my truck? Thanks!

My car has 150000 miles.
My car has an automatic transmission.

A: Hi there, thanks for writing in. Have the f...

Hi there, thanks for writing in. Have the fuel injection system cleaned and the cylinder compression tested. The intake valve may be covered in carbon deposits and having the combustion chambers cleaned. If you need to have this scoped out, a certified professional from YourMechanic can come to your car’s location to diagnose the Check Engine Light and pinpoint the proper repair to fix this.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: stalls when put in gear

The idle control valve may be stuck or you have a vacuum leak. Try to disconnect the vacuum lines to the EGR valve to see if it still stalls. This may be due to problems in the vacuum system. Try...

Q: Soft close trunk feature not working

This is a common issue on your car. Most of the time it is caused by a programming issue. The rear module needs to be reprogrammed to fix this. If the problem continues then the contact sensors may have failed....

Q: driving down road and reduced power comes on i have no speed , i pull over let it sit for 15seconds and it wil be off but wil do i

Hi there: It's very difficult to diagnose a problem remotely; however, there are a few things that could be causing this issue to occur. In most cases, when the stablitrak and check engine light illuminate, it's because a sensor has...

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...
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...
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...