Hey guys I just reinstalled my mac straight shot intake system this morning and it drives fine and all and then just a few moments ago the check engine light came on and i am throwing a po174 code. My mods are in my sig. I use to have the intake system on a few months ago and then took it off and didnt have any problems with the check engine light coming on.
I think my car has been running lean for a while with no code and the intake system off because after the midpipe install i got a rattle type sound and that was an exhaust leak. so we had the exhaust welded and i got longer studs to go in the manifolds and it went away. Then a few weeks later i started getting a sound that to me sounded a lil like engine ping and little like an exhaust leak im not sure and still no codes(this all happened when the intake was off).
Do you guys think its just a vaccum leak either in the intake or a small exhaust leak which may be a possiblility if the manifold studs came loose.
I think my car has been running lean for a while with no code and the intake system off because after the midpipe install i got a rattle type sound and that was an exhaust leak. so we had the exhaust welded and i got longer studs to go in the manifolds and it went away. Then a few weeks later i started getting a sound that to me sounded a lil like engine ping and little like an exhaust leak im not sure and still no codes(this all happened when the intake was off).
Do you guys think its just a vaccum leak either in the intake or a small exhaust leak which may be a possiblility if the manifold studs came loose.