Hello All. I have A 2004 Silverado 6.0L ever since i took off the stock air filter and put on a K&N cold intake part #57-3031-1 I keep getting po171 or 174 right bank or left bank running to lean but only at idle. I just had knock censors replaced before adding cold air intake so chances of leaks around manifold
should be slim
. Anyone else have this problem or know how to cure it i really don't want to put stock filter back on.
Thank You in advance.