P0170 Fuel Trim Malfunction (Bank 1)

[Grapdawg]

Hello All, Well after searching this forums and doing some research, I would like to get some of your opinions before i try and rid my T4R of this dam CEL. OK so i changed the plugs and wires cleaned the MAS and throttle body. the code keeps coming back. Should i change the 02sensors or a new MAS? Im on a budget and only have enough cash for one or the other. Any suggestions? 2000 T4R Limited V6
~ Hard starting (usually 5-6 cranks) ~ idles rough when cold ~ Poor MPG (about 14-16) ~ Idles high at times

 

[Grapdawg]

sorry wrong code. P0171

 

[fourwd1]

Start by checking the air induction system and hoses for leaks.
Then O2 sensor and wiring.

 

[Grapdawg]

OK! Thanks for the reply! I was beginning to wonder if anyone was out there. I did check the vacuum lines that are associated with bank 1 cylinders. I will try and take a more thorough look this week. I'm thinking O2 sen as it is so intermittent. I have reset the ecu a couple times and it takes a day or so of diving before the CEL comes back on.