o2 sensor issues
Thread Starter
TECH Regular
Joined: Dec 2011
Posts: 461
Likes: 0
From: Hastings, Nebraska
o2 sensor issues i seem to be having o2 sensor issues but they arent setting a code... the sensors are bouncing all over the place. Drivers side more then passenger..
also car smells rich
time for new ones?
i have an idle log if anyone wants to see it...
also car smells rich
time for new ones?
i have an idle log if anyone wants to see it...
If it's in closed loop they should be bouncing wildly from .1xx to .9xx. That's how they're supposed to act. Only in open loop should they read steady (they are warming up).
"Smelling" rich is a very inaccurate way of determining how a car is running. I'd only be concerned with the smell if it was at the front of the car or raw fuel is pouring out the exhaust pipes.
"Smelling" rich is a very inaccurate way of determining how a car is running. I'd only be concerned with the smell if it was at the front of the car or raw fuel is pouring out the exhaust pipes.
Funny you mention this, as my car is having a similar issue. It's at PCM for less right now about to be dyno tuned....but the tuner mentions: "It looks like the reason why the car has been running rich is because the passenger side O2 sensor isn't quite up to health. That side is maxed out lean and adding the as much fuel as it can. The left side is working properly and only averaging 3-5% off from perfect. We can put a new O2 sensor in it on the right side and see if that clears it up. Sometimes its not the o2 sensor its the wiring going down to the O2 sensor since it runs so close to the header on that side. "
So for several months now I've been wrongly blaming my mail order tune for being too rich
So he's throwing in a new O2 today and seeing what happens....hopefully it's not the wiring that's a problem. I replaced both O2's about 2 years ago...seems odd it's already acting crazy. I'll let you know how it does with a new O2.
So for several months now I've been wrongly blaming my mail order tune for being too rich
So he's throwing in a new O2 today and seeing what happens....hopefully it's not the wiring that's a problem. I replaced both O2's about 2 years ago...seems odd it's already acting crazy. I'll let you know how it does with a new O2. Thread Starter
TECH Regular
Joined: Dec 2011
Posts: 461
Likes: 0
From: Hastings, Nebraska
If it's in closed loop they should be bouncing wildly from .1xx to .9xx. That's how they're supposed to act. Only in open loop should they read steady (they are warming up).
"Smelling" rich is a very inaccurate way of determining how a car is running. I'd only be concerned with the smell if it was at the front of the car or raw fuel is pouring out the exhaust pipes.
"Smelling" rich is a very inaccurate way of determining how a car is running. I'd only be concerned with the smell if it was at the front of the car or raw fuel is pouring out the exhaust pipes.
it has no cat so thats probably 80% of the smell and no its not dumping fuel outa the exhaust lol. whats a good brand of wide band o2 sensor?
Afs75:
http://www.gmpartsdirect.com/results.cfm
Gotta love it when the RIGHT **** is cheaper than the wrong ****.
http://www.gmpartsdirect.com/results.cfm
Gotta love it when the RIGHT **** is cheaper than the wrong ****.
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