Diagnostic codes

[coolbrze]

Truck has been shaking/sputtering when under accelleration & the check engine light came on. I pulled the codes on the truck below in my sig & got:

P0171 - System to lean Bank 1

P0301 - Cylinder 1 misfire detected

What does this mean in English?

 

[mentalbreakdown00]

Ok it means the computer has detected a missfire on cylinder one and that the oxygen sesor on that bank thinks it's running to lean. Now I would check for a vacuum leak, check the plugs, make sure you have good spark, and let us know whats going on.

 

[coolbrze]

Ok it means the computer has detected a missfire on cylinder one and that the oxygen sesor on that bank thinks it's running to lean. Now I would check for a vacuum leak, check the plugs, make sure you have good spark, and let us know whats going on.

Is there any thing in specific that I should look at to see if there's a leak? I checked the PCV and other hoses and didn't see any dry rotting or cracked hoses. I pulled the plugs & cleaned them, but the problem persists. How do I check for good spark or should I just replace the plugs?

BTW - which is cylinder 1, it's an inline 4?

 

[ForOffRoadDriving]

it will be the cylinder closest to the front of the truck. check the resistance of the spark pulg wire on cyl 1 to the other 3 cyl using a volt meter. you may have a bad wire or one that has built up a high resistance over time.

 

[naford]

Pull the spark plug and see what it looks like.

 

[coolbrze]

it will be the cylinder closest to the front of the truck. check the resistance of the spark pulg wire on cyl 1 to the other 3 cyl using a volt meter. you may have a bad wire or one that has built up a high resistance over time.

Is the correct way to do this by grounding 1 volt meter tester to the engine block, then touching the other to the spark plug wires, 1 at a time?

 

[coolbrze]

They all showed about the same reading, any other ideas? May just have to take it to the dealership...