ok...so firestone just called me telling me that my fuel system is pushing about 90 psi... they told me either my ecu needs to be reset or i need a new fuel pressure regulator AND fuel pump... basically i just need to know if resetting the ecu is something i can do by disconnecting the battery for 15 min then touching pos to neg...or if there is something i need to do... PLEASE HELP ME!!! i drove 70 miles and im at half a tank...FML!!!!

 

what model engine do you have? are you sure its not just the fuel gauge not working? there was a tsb on that for the SC.

 

first of all what the hell is firestone doing looking at your fuel system lol. . . isn't that a tire shop??

 

x2!! Man on my car I can fill it up and be under a quarter tank for 250 miles somethings and the rest of the fuel is gone in another hunder. The fuel senders suck in these damn cars.

 

i went to firestone bc they are within walking distance from my work.... i just got it back and the codes that they found were P0101, P0138, and P0172... im about to reset the ecm to see if that changes anything... but is anyone has any ideas please let me know... oh and its an 06 2.0 SS/SC (dont know if its a lnf or a lsj...)

 

you have a LSJ..

P0101 Mass Air Flow (MAF) Sensor Performance ECM, PCM

P0138 HO2S Circuit High Voltage Sensor 2 ECM, PCM

P0172 Fuel Trim System Rich ECM, PCM

 

Fuel PRESSURE, not LEVEL....

To the op - disconnect the battery, let sit for 10 minutes or so, reconnect - no need to touch pos and neg together. Should reset the codes but if the regulator or pump is bad, they will come back.

Might need the ecu reflashed, gonna need a trip to the stealership for that though.....

 

did firestone notify you of a prancing unicorn that was poking holes in your exhaust. they mite try and tell you its not covered under your warranty. make sure they dont do a complimentary, but still charge you, tire rotation either.

 

Mods? Mileage? Last time you change fuel filter?

 

Well, this would explain it. Sounds like your MAF isn't working, and/or your 02 sensor. Not sure what Fuckstone was thinking. Here is how I reason it. Your MAF isn't working, telling you that too much, or too little air is making it to the engine, it is obviously adding fuel (hence the P0172 code), which could in turn ruin your O2 sensor, thus tripping the P0138 code. Makes sense in my mind... anyone else?

 

havent changed the fuel filter... i have a boost gauge and aftermarket exhaust (both on when i bought it not sure what kind of exhaust)... all in know is im so pissed about this **** and i could prolly hook up a spark system on my exhaust pipes to give it that sweet fast and the furious flame thrower effect bc its so rich... how can i check the MAF to see if thats it???

 

I am not sure if you can check it, to be honest. There might be a way to check the voltage, but I am not sure. I don't think they are too expensive from Autozone, wouldn't hurt to pick one up and try it. But, WHATEVER you do, don't touch it in the wrong places.

 

other then pulling the maf and visibily checking for damage or any film on it. there's not really much you can do to check it. how many miles do you have on the car, i would recommend changing it (you'll get better fuel economy when everything is fixed) and yes i would agree that it is the maf as the 2nd O2 sensor doesn't really effect your trims its the first O2 sensor that directly effects your fuel trims. and since there isn't a catalyst efficiency code in there your cat should still be good as long as you get this fixed as soon as possible. and your high fuel pressure that firestone says you have could be related to an old fuel filter as well.

 

firestone is a full service shop. Not just tires. I work at one. Now dont get me wrong ive had cars come in from other stores and they didnt know what there were tallking about, but we have cars come from the dealer to us and have figured out some issues they couldnt. So dont label every store just because u had some dumb ass work on yours

no offense but uve obviously never tested a MAF before. There are ways and specs to test it and the voltage of the pins in the harness

 

i'm well aware of how to test for voltages but i was assuming that the OP didn't have the appropriate tools to test that which is why i responded in the way i did. the average person wouldn't know how to check all that. and yes i've tested mafs before. i'm a tech at a GM dealership thank you very much. but to the OP if you do have a multimeter and do know how to test for voltages i apologize for assuming that you didn't.

 

and the only reason i said that is because you said that without visually inspecting it for film or damage there is really no way you can. Thats why i said what i did. and if he knew how to use a multimeter im sure his car wouldnt be at firestone

 

if they measured your fuel pressure accurately at 90psi, then the pump is fine. the regulator will need to be replaced. as for the codes, like the other guys said it could either be your MAF or O2 sensor

also your fuel filter should be fine, if it is old/clogged the pressure would be too low

 

i do have a DMM and know how to use it... if i know what to look for and what is should be at certain parts then i can check it.... i actually work on cars, but only audio systems... and my milage is 66700 ish...

 

well if it will help tom when im at work i can get on alldata and check the values for the MAF sensor but firestone will do it for u as well

 

the only thing firestone told me was the codes and that they think its the fuel level regulaor, fuel pump, or ecm needs to be reprogrammed... told me plan on $1000 to fix... not including the $99 to tell me all of this....

 

sounds like the store u are at is garbage, for the diagnostic fee they should tell you exactly whats wrong with it not pull codes and say what it could be. I have guys come to see me all the time because they cant replace and bolt in stuff but have no diagnostic skills so when i tell them what it is they fix it. I would tell the manager that u arent happy and they need to do more testing and not guess. Corporate also just passed a policy that if you are upset they WILL handle the problem in store

 

Do yourself a favor and don't take the car back there. thats far too much money when it seems like its most likely the MAF. I mean, did they completely overlook the MAF code?

 

it seems like they did...and im starting to think that it is the maf bc i post a thread about my car losing power when it rains and someone suggested MAF.... i might just buy the ****** and give it a shot... but its gonna suck if im still haveing the same damn problem afterwards...

 

Do yourself a favor and don't take the car back there. thats far too much money when it seems like its most likely the MAF. I mean, did they completely overlook the MAF code?

 

Well, ya gotta start somewhere. IIRC, its about a $75.