O2 Sensor Simulator Question

[Mullet_GST]

I've read a couple of the different post about them

Post 1
Post 2
Post 3
Post 4

Now my question is how exactly does is control the lean/rich Ratio. Cause the car as it sits runs Rich. The sensor is not Hooked up at the moment. And I figure I'd give this a shot. Now is it only good for shutting off the light and nothing else or will it actually Cause the ECU to adjust the ratios?

Many Thanks

 

[slayer450]

Why are you wanting to use one?

 

[95TalonOwner]

O2 simulators are for the rear sensor which has nothing to do with your fuel mixture. All the second sensor does is monitor the converter and turn the CEL on if the cat is bad. People put a simulator in when they delete the cat and don't want a CEL. You car is running rich for some other reason.

 

[Mullet_GST]

The CEL is annoying for one, Im getting terrible Gas milage (120 Miles to the tank full, compared to my buddy's GS who gets almost 400) The Codes i know it was throwing off was Both O2 sensors The front is hooked up while the back they cut the harness hence the Simulator and the MAF but the car runs to good minus the horrid Milage and it running a tad rich.

 

[TurboLaserRS]

The rear o2 sensor in an OBD2 setup is not used to control the fuel mixture. It measures the efficiency of the catalytic converter and throws a CEL (PO420) if it goes below a certain threshold. If you cut the harness off you should be getting a o2 sensor no activity CEL. If you have a stored code for the front o2 sensor, you need to replace it.
The reason it would be running rich is that when the computer determines the front o2 is reading improperly, it reverts to open loop mode. This is a 'safe' fuel table, but on most cars (dsm's are no exception) this causes them to run extremely rich.

 

[slayer450]

You're buddy has a gs, you have a gst. He is going to get better mileage. As for the o2 re wire it, go to your local parts store and pick up some non-foulers the sensor with thread into. Drill them out, thread em into your exhaust, thread the o2 into that and reset the ecu. That should get rid of the light. What that's doing is pulling the rear o2 out of the exhaust stream so it will see a difference in temp and make it look like the cat is still there

 

[Mullet_GST]

I Think there was one more code now that i think about it the Idle Air Control? I bought the sensor but i cant seem to find where it hooks up to. or find the pig tail it would hook into. General area location on it?

 

[sypherzero]

The CEL is annoying for one, Im getting terrible Gas milage (120 Miles to the tank full, compared to my buddy's GS who gets almost 400) The Codes i know it was throwing off was Both O2 sensors The front is hooked up while the back they cut the harness hence the Simulator and the MAF but the car runs to good minus the horrid Milage and it running a tad rich.

I'm not trying to be an ass, but the main reason for the GS gas mileage being better is that it is a n/a vehicle. The engine in the GS is a 420A and the GST has the glorious 4G63T.

 

[slayer450]

The idle air control could screw it up to. Should be near the throttle body.

 

[slayer450]

I'm not trying to be an ass, but the main reason for the GS gas mileage being better is that it is a n/a vehicle. The engine in the GS is a 420A and the GST has the glorious 4G63T.

The biggest factor I've noticed with mileage in my gst is my foot Stay out of boost if your looking for better mpg.

 

[Mullet_GST]

I'm not trying to be an ass, but the main reason for the GS gas mileage being better is that it is a n/a vehicle. The engine in the GS is a 420A and the GST has the glorious 4G63T.

But with it being turbocharged it should damn near get better gas milage then his. More forced air better ratios ect. I've had supercharged cars in the past bulit that got better milage then this thing -_- And believe it or not, i do keep it out of boost. i drive it like a normal car.

@slayer i'll check into that, who ever had it before me put a complete aftermarket intake set up and from the IC pipe to the throttle body it's like a rubber hose type deal or something, would it be on the pipe right before the TB

 

[eclipse2g4g63]

I'm not trying to be an ass, but the main reason for the GS gas mileage being better is that it is a n/a vehicle. The engine in the GS is a 420A and the GST has the glorious 4G63T.

Not true
In europe the GS is 4G63 without turbo. Like mine only i'm now running a evo3 turbo so it is a 4G63T, and the gas mileage is depending on my rightfoot.
If i want gas mileage stay out of boost! Simple

 

[slayer450]

But with it being turbocharged it should damn near get better gas milage then his. More forced air better ratios ect. I've had supercharged cars in the past bulit that got better milage then this thing -_- And believe it or not, i do keep it out of boost. i drive it like a normal car.

@slayer i'll check into that, who ever had it before me put a complete aftermarket intake set up and from the IC pipe to the throttle body it's like a rubber hose type deal or something, would it be on the pipe right before the TB

The iac attaches to the throttle body. I'll see if I can find a pic, if not maybe someone else has one

Rubber hose from the ic to the throttle body elbow sounds factory to me.

 

[Mullet_GST]

The iac attaches to the throttle body. I'll see if I can find a pic, if not maybe someone else has one

Rubber hose from the ic to the throttle body elbow sounds factory to me.

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Thats what im working with. Yes i know there is no filter on it. I need to replace it, just waiting for my pay check. And then i found this unconnected pig tail, which goes to right about where the BOV is.

 

[slayer450]

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Thats what im working with. Yes i know there is no filter on it. I need to replace it, just waiting for my pay check. And then i found this unconnected pig tail, which goes to right about where the BOV is.

In the last pic, the hose that's testing on the fuse block, do you run out like that? That needs to be attached to the bov. If you can't right now at least take it off and plug the hole. Letting in un metered air will make it run like absolute crap

 

[Mullet_GST]

In the last pic, the hose that's testing on the fuse block, do you run out like that? That needs to be attached to the bov. If you can't right now at least take it off and plug the hole. Letting in un metered air will make it run like absolute crap

I've ran it blocked off and i've ran it recirculated. I haven't driven the car since march, i need to re register it, have no money to do so. So i've been fixing all the stupid things wrong with it before i put it back on the road. I'm probably gonna hook it back up to the BOV just havent had time to do so. But when i was driving the car it was blocked off.

 

[slayer450]

And other than the greddy style bov it looks factory.

There are a few sensors around that area, look to see if something is unplugged. I know the cruise control is right there on the wheel well

 

[Mullet_GST]

And other than the greddy style bov it looks factory.

There are a few sensors around that area, look to see if something is unplugged. I know the cruise control is right there on the wheel well

Hmm. I know the Cruise doesnt work because the little paddle by the steering wheel is gone, i guess they thought "weight Reduction" but ill take a gander. I just want to get this thing running better. But the MAF code confuses me because the car runs to good for the MAF to be bad unless it goes back to the unmetered air like you said?

 

[slayer450]

Idle air control.

 

[Mullet_GST]

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Thats the same area in which your picture was taken, now on the underside of the TB there is a Block off plate it seems, I would go out on a limb to say it's been deleted?

 

[delta448]

1. Replace the front O2 sensor and don't unplug it.

2. Do a boost leak test.

3. Recirculate the BOV, or at least cap off the recirculation hose so you aren't ingesting unmetered air. For some reason all I can think of when I see that picture is the cash for clunkers engine destruction videos on youtube.

4. Figure out WTF is up with your throttle body. There should not be any hoses directly connecting the turbo snorkel to the intake manifold.

5. That loose plug in your picture is indeed the cruise control vacuum pump connector, and the cruise vacuum pump has been removed from your car, so you won't have anywhere to connect it.

 

[Mullet_GST]

1. Replace the front O2 sensor and don't unplug it.

2. Do a boost leak test.

3. Recirculate the BOV, or at least cap off the recirculation hose so you aren't ingesting unmetered air. For some reason all I can think of when I see that picture is the cash for clunkers engine destruction videos on youtube.

4. Figure out WTF is up with your throttle body. There should not be any hoses directly connecting the turbo snorkel to the intake manifold.

5. That loose plug in your picture is indeed the cruise control vacuum pump connector, and the cruise vacuum pump has been removed from your car, so you won't have anywhere to connect it.

On number 4, Turbo snorkel? I'm confused by what you mean.

 

[Mullet_GST]

1. Replace the front O2 sensor and don't unplug it.

2. Do a boost leak test.

3. Recirculate the BOV, or at least cap off the recirculation hose so you aren't ingesting unmetered air. For some reason all I can think of when I see that picture is the cash for clunkers engine destruction videos on youtube.

4. Figure out WTF is up with your throttle body. There should not be any hoses directly connecting the turbo snorkel to the intake manifold.

5. That loose plug in your picture is indeed the cruise control vacuum pump connector, and the cruise vacuum pump has been removed from your car, so you won't have anywhere to connect it.

On number 4, Turbo snorkel? I'm confused by what you mean.

 

[Mullet_GST]

1. Replace the front O2 sensor and don't unplug it.

2. Do a boost leak test.

3. Recirculate the BOV, or at least cap off the recirculation hose so you aren't ingesting unmetered air. For some reason all I can think of when I see that picture is the cash for clunkers engine destruction videos on youtube.

4. Figure out WTF is up with your throttle body. There should not be any hoses directly connecting the turbo snorkel to the intake manifold.

5. That loose plug in your picture is indeed the cruise control vacuum pump connector, and the cruise vacuum pump has been removed from your car, so you won't have anywhere to connect it.

On number 4, Turbo snorkel? I'm confused by what you mean.

 

[Mullet_GST]

1. Replace the front O2 sensor and don't unplug it.

2. Do a boost leak test.

3. Recirculate the BOV, or at least cap off the recirculation hose so you aren't ingesting unmetered air. For some reason all I can think of when I see that picture is the cash for clunkers engine destruction videos on youtube.

4. Figure out WTF is up with your throttle body. There should not be any hoses directly connecting the turbo snorkel to the intake manifold.

5. That loose plug in your picture is indeed the cruise control vacuum pump connector, and the cruise vacuum pump has been removed from your car, so you won't have anywhere to connect it.

On number 4, Turbo snorkel? I'm confused by what you mean.