So my cel came on with code p0171 which said that it is running lean. I took it to the dealer and they said that because i installed aftermarket breathers, it tripped the cel and they removed the breathers. Also I installed a vacuum gauge and the line for it is coming off the block. They removed that too saying it was leaking. I put the line back on because i like my gauge and the cel came on today with the same code? Do you think its my vacuum gauge line again?