Camarosteve

I'm getting a lean reading on bank 2 of my 00 ls1. P0174 accompanied with P1153. Is it possible to have a vacuum leak on only one side of the motor? Its a noticeable difference in the way it drives as well.

Funny thing is I had set off a lean code for both sides (P0171, P0174) and found an air leak where the PCV valve hose connects to the intake. Fixed that and thought the problem would go away and now Im only getting it on one side.

Im 150 miles through a tank of gas mixed with seafoam so I would assume its not the injectors either?

I have also sprayed starter fluid around all vacuum hoses and my intake manifold to see if I could find a vacuum leak but I couldn't. Any other ideas? Could my lean condition from before "fouled out" my front o2 sensor causing a lean condition now?

Mods are as follows: slp long tubes, tsp x pipe, some type of clear lid that was on the car when I bought it and a k&n air filter

Drew24

Usually if its only one bank it tends to be just the front o2 sensor is bad. Best way to check is to hook it up to a live data scanner and see if the o2s are cycling properly.

senicalj4579

iTrader: (41)

Ok so thats bank 2 sensor 1. Take that out and put another in its place. See what happens. I had to do it yesterday

Drew24

or you can just unplug one and see if there is any difference in the way the car is running

lt1pwr1

iTrader: (1)

Have you ever replaced the intake gasket? Try spraying some carb cleaner around it and see if it chokes the motor a little.