What engine???????? You should refer to repair manual if not familiar with auto repair and understand the terminology before attempting Remove nuts holding exhaust manifold to cylinder head & remove nuts/bolts holding exhaust manifold to exhaust pipes Use new exhaust manifold gaskets and install the new manifold securing the manifold to cylinder head (may need to but new nuts and or bolts) by "snugly" tightening manifold to cylinder head if not refering to repair manual
screwed into your exhaust manifold.
on the passenger side of the engine below the exhaust manifold on both 6 and 4 cylinder models on the passenger side of the engine below the exhaust manifold
your oxygensensor is bad ,its screwed in to your exhaust manifold, about 30.00
It is in the exhaust pipe right after the exhaust manifold.
follow your exhaust from your exhaust manifold and you will find.
there are two cat one iswielded with the exhaust manifold and the 2nd is connected to the exhaust manifold with the o2 sensor leading to the exhaust.
its screwed into your exhaust manifold.
The fuel mixtue has gone lean.
you have 3 of them ,1in each exhaust manifold and 1 in one of the pipe leaving the exhaust manifold.
its screwed into the exhaust manifold,undo wire and unscrew at manifold.