The list

[brkwd51]

ok here are a list of problems the my msp has...

first though some background-
82,833k miles
all stock besides injen CAI
i bought it early july with 80,627 miles
got the oil changed when i got it

ok the list:
1. broken stock head unit- when i got the car it worked prefectly fine and its slowy got to the point where it doesnt work at all.
2. check engine light- code p0171 (the too lean/rich one) this code has been going on and off for a month now. it will be on for like 3-4 days then magically turn off for like 2 days.... then on again.
3. horrible squeak from a belt- only happens for like 5-15 seconds. it only happens about 1 out of every 5 times i back out of the driveway. it is the LOUDEST most horrible sound in the world. haha
4. jerking- at wot usually 3rd gear when i get into boost the car kinda jerks like im tapping the break rapidly. also it has some hesistation like 3 out of every 5 times wot.
5. bad idol- every time i sit it in neutral like at a stop light or something of that sort for like more than 1 minute... the rpms will dip to the point where it will almost die then quickly rise back up to normal, it does it like 4-5 times then just goes back up and stays normal.
6. wheel squeaks- the left front wheel will have a squeak when i turn right. or travel very slow like 1mph. but its getting increasingly worse day to day.
7. squeaky brakes- breaks are bad and squeaky.

ok so my questions are...
-what should i get fixed first? How should i go about doing that (whether to try to do it myself or take it to the dealer or something)?
- and please explain to me what are the causes of some of the problems. (especailly the idol and jerking/hesisitation)

thanks guys i appreciate the help!

 

[justanothermp5]

ok the idle is from your egr being clogged or to dirty, check the how to section about how to clean it, most people find that this fixes the idle
horrible belt squeaking, get new belts, yours are prob worn and when they slip they make the squeaking sound,
get new brake pads, and/or rotors and that should fix your brake squeak

the hesitation is from boost cut, im not sure how to fix it but u can ask other people on here, im sure they will know

 

[justanothermp5]

oh and get a new headunit from best buy or something, it'll work better and sound better

 

[dstmsp03]

for the fuel cut.. get a joe p fcd or a split second afc.. just my thoughts.. should stop the hesitation issues

 

[MSP #167]

lean code, check for vacuum leaks and replace your wastegate actuator, they leak and cause that code. That may also fix the jerking you are feeling as the wastegate is probably ****** causing your boost to spike and hit fuel cut.

 

[brkwd51]

what about the squeaky wheel?
and what is a egr valve?

thanks for the help by the way!