Mr.Slow

Ok, so my car is running rough. It will start to seemingly cut fuel and die. It has been my daily driver as the sti is in the shop, so ive had it looked at by a mechanic who failed to fix it. It's throwing p0174. Today was it's worst day and died as I pulled into my house. I bought an 02 sensor but don't even have the means to put it in. I cleaned my maf and put the stock bellow back on and cleaned the filter. Now it starts and dies soon after and throws out p1153 and p1133 I'm not too sure what to do. I really need to get this car running and hope it's going to be cheaper and easier to fix than the sti.

94'BLKBRD

iTrader: (76)

p0174- fuel trim system lean bank 2

p1133- Insufficient switching Bank 1 Sensor 1(Front Drivers side O2 sensor)

p1153- Insufficient switching Bank 2 Sensor 1(Rear Drivers side O2 sensor)

Mr.Slow

Could be as simple as bad 02 sensors? Multiple ones?

eseibel67

iTrader: (10)

You have the code names correct, but the positions wrong on P1153.

Bank 2 is passenger's side.

Sensor 1 is upstream (front) O2 sensor.

orangeapeel

iTrader: (18)

the front O2's are the ones to worry about.

Mr.Slow

So the 02 sensors before the cat are the issue?

94'BLKBRD

iTrader: (76)

Replace your front o2 sensors. I had the same problem 2 years ago, my car kept dying so I replaced both o2's and everything was back to normal.

ArkBird96

Yes. You need to replace both of those. The computer uses those sensors to set the correct A/F ratio when in closed-loop mode.

LS6427

iTrader: (2)

Strange to lose both sides at the same time........it happens....but man thats some serious odds.

Pop two new ones in and see what happens. If that doesn't help, you could have a PCM problem.

.

Mr.Slow

Will do. Also got a p0300 code... Thanks..

lt1pwr1

iTrader: (1)

I too thought it was really weird to see both sides fail at the same time. I'm actually thinking you have a MAF problem that is confusing the o2's. I guess it is cheaper to put in some o2's rather than a new MAF though...

LS6427

iTrader: (2)

Well, remember the MAF is only operating at cold start....then whenever you go WOT. The 02 sensors take care of everything alone when not at WOT and after the temp (I think) passes 122* or whatever.

So if running rough during casual driving at normal throttle levels...its not the MAF.

Could pull the two caps off the top of the PCM to check for any burnt pins....

.

Mr.Slow

How hard is it and what wrench is required to replace my 02s?

eseibel67

iTrader: (10)

7/8" open wrench, and come out through the bottom pretty easy IIRC.

Mr.Slow

Thanks! I'll keep you posted on of it fixes anything.

WFOSS

iTrader: (18)

Also P0300 is random misfire, but definitely could be because of it dying and running poorly.

Mr.Slow

Okay, was able to change the front passenger oxygen sensor. The driver side I could not get off and I'm putting her on a lift tomorrow. Now my car sets off a p0154 and that's it. Minor feeling of misfiring or fuel cutting off bit it runs enough. Did I mess up?

Mr.Slow

I still really need help!!! Car runs awful and I have a p0101, p0154 x 2, and p0300. I'm willing to buy whatever to fix it, but can't stand this problem much longer. The carmcamt keep up with traffic now and I have nothing to drive.

Mr.Slow

Oh I'll mention that the car smelled lime rotten eggs when I parked it. Bad cat?

nimrod.sixty9

iTrader: (5)

First thing I thought, bad CATS. Will cause it to run like poo closed or open loop.

BUT... it could also be something else (your actual problem) that caused your CATS to go bad. In other words; bad O2's ,or whatever else, causing you to run rich and eventually **** up the CATS.