Before I go buying a new replacement O2 sensor and wasting the money I wanna rule out my other options first, also I have replaced my front O2 sensor on one of my galants with a Bosch and haven't had a problem since
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I know what you mean it sucks wasting money on something not needed. But you said you had codes from the O2 sensor.
Just out of curiosity what did the metal cage on the Bosch O2 sensor look like that you replaced on the galant with no issues you are refering to?
Reason I ask is I just replaced mine a few months back and the stock O2 sensors metal protector look like swiss cheese sort of speaking. Where the new Bosch one only had 3 or 4 slots around it. And my gas millage is very low with the new Bosch one. And I have noticed when I leave my house on a cold day the car seems to stay in a so called "choke" position for a longer period of time then when I had my stock O2 on when it was working.
Check this thread out if you dont mind. I am going to try adding a little more to it.
https://www.thegalantcenter.org/showthread.php?t=46297
I didn't say we had codes. I wish we did cuz it would make it easier for me to figure out what's wrong with his car
I don't have pics of the sensor but I remember it had more than 3 to 4 slots, I guess it looked like swiss cheese and my car reaches normal operating temp the same way it was with the oem sensor.
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Bro check the spark plugs maybe they have oil on them. Also injectors.
Are they for the i4 or v6? You could sell them. I have a v6 tb laying in my garage waiting for a iac sensor so i can put it on my g.[/QUOTE]
Testing the IAC
http://www.youtube.com/watch?v=qC1Omt5_ItM
you can do this on or off the car ...
So your car idles at roughly 1k-1.5k at cold start right? The bad idle that your wondering about that its not stable hold that high RPM while warming up or it just drops to fast? Im just getting some details before I make some assumptions.
So your saying it idles ONLY when your car is warm?
egr valve, just sumthin that popped up ,
on another totally different truck .... i had a similar prob with idle an o2's for a couple years it never showed a egr code at all till 3 years later, then once i replaced it bammm , cured all my problems
it was a 98 gmc sierra, if u already replaced it with another, sorry for postin a repeat, theres alotta replys to this thread
Well let me welcome you to the 21st century where we have built-in heater element in the o2 sensor, so there are no rich or lean conditions while the engine is not in operational temps.
Dont mean to bash, but your logic makes no sense too. Idle position to running position wth is this?
Ment to say cold idle versus a warm to fully warmed operating state. Like I mentioned It's long dont feel like typing it all out.
In short form if the O2 is shot it doesnt read right when the car is cold or might not read at all. Most of the times it really messes up when cold and might work once warmed or close to full operating tempetures. And it can cause the car to stall out when the motor is cold and idled, if the O2 sensor is shot.
F.Y.I - a heating element would be something like the "plugs" on a diesel motor or inside your house furnace. O2 sensor is a different story all together.
Trying to help, not to criticize.[/QUOTE]
No problem thats cool. I was still a bit stuck on old school rules. And under the impression that they heated up from the exaust.
So I guess we can say the O2 is a heating element. LOL
so cleaned the TB and it didnt make a difference
tested the IAC and it works
nothing changed
my friend suggested that the coolant temp sensor might be bad so we used one that we had on a spare engine that was running before we took it out of the car
tomorrow i will find out if the sensor fixed the problem or not
Please tell me u r joking.
Our cars have 2, a temperature sender which sends the signal to the gauge and so u can see your temp and that one is located on top of the thermostat housing and has one wire
The temp sensor is located under the thermostat housing and screws into the head and has two wires and that has nothing to do with the gauge.
If u believe I'm wrong please prove it but from what u said I bet u didn't know that we had two on our cars.
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The Temp sensor has nothing to do with this. The temp sensor determines when the ECU goes from open loop(cold engine) where it doesnt use the O2 sensor to correct the fuel going to the engine, into closed loop(oper. temps) where the o2 sensor is active and feedbacks to the ECU. The other function is to enable the trigger signal for the fans.