check engine light on two codes PO171 and PO174

Tell me what I have to repair do I have to look for a broken vacuum line or what do I have to do to fix the problemCptTrevor

Listen for a suction noise or a whistle sound and takes a trained ear for this sometimes. Many people use carb clean and spray around the top of the engine and check for idle variations but this is also a fire hazard, if you try this have a water hose at hand.

would I do this in the vicinity of the intake manifold? or the maf sensor

check for a crack in the vacuum chamber on the left fender. we had one after an acident

I would check and get back to you CptTrevor

All vacuum lines were rotten and broken