Originally Posted by Anthony915
Went to Autozone and got the check engine code: P0171.
I know that means a lean fuel mix and the Autozone guy recommend I buy a new set of plugs and wires. While I would love for that to be the solution is there a way to know if it's the plugs or wires or oxygen sensor without replacing them first. Or do you guys still think it's the fuel pump or related issue.
If a plug misfires, the fuel doesn't burn and gets pushed into the exhaust causing a rich condition.
It sounds like a fuel problem. If one injector wasn't putting out enough fuel, it would cause a lean condition but it should start. It would have a power problem.
If the pump isn't pumping or the computer isn't telling the injectors to fire, The oxygen sensor will read a lean condition. A fuel pump relay should be fairly inexpensive and easy to change just in case that would be the problem.
I don't know if the computer stores codes like fuel mixture on startup or if the engine has to be running for a certain time to allow everything to balance out. It would be nice to have a fuel rail pressure gauge inside the vehicle to check when it doesn't start.