Soooo...I gave my friend a jump the other day. It took about 3 tries to get his car up and going. When I got in my truck my CEL was on. Since I have a Scan Gauge I checked the codes and it said there were 6 codes. A P0171, P0174, and P0000. I cleared the codes and continued about my day. The next day the light comes back on. Checked the codes, same thing. Cleared them again after finding out it's nothing major....so I thought. I just cleared them for the 3rd time and disconnected the battery for 20 minutes(killing 20 minutes by typing this). What's my problem, and what's my solution? Thanks in advance guys.

 

p0171 and p0174 could be

1. oxygen sensor defective
2. ignition misfire - repair
3. fuel injector problem
4. vacuum leak
5. Clean your MAF.


p0000 is nothing

 

I'm kinda leaning towards the MAF. I started it up about 15 minutes ago and for the 2nd day in a row now it did a surging idle for about 10 seconds. It'd sit at ~1200rpm(cold, high idle), then drop down to about ~600rpm, then back up, then back down.

 

could it be that rubber elbow on the passenger side?

 

bingo. bet your mpg's are down too. the 171 174 codes will be lean on bank 1 lean on bank 2. its causing unmetered air into the intake causing the lean codes.
willing to be the underside of the elbow is torn. i got a replacement at autozone for 6 bucks.