O2 Simulators for Lt-1 92-96???
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St. Jude Donor '03
O2 Simulators for Lt-1 92-96???
Hey everyone!
I was wondering if they make O2 simulators for a 92-96 Lt-1. If they do where can you get them? I'm tired of f'in with them every time I change an exhaust setup. I think they also give BS :bs readings sometimes.
Thanks
Vic
I was wondering if they make O2 simulators for a 92-96 Lt-1. If they do where can you get them? I'm tired of f'in with them every time I change an exhaust setup. I think they also give BS :bs readings sometimes.
Thanks
Vic
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Re: O2 Simulators for Lt-1 92-96??? (VictorRussell'92)
You can just unplug the O2 sensors and let it run in open loop all the time if you wanted. The O2 sims are more for the '96 and up ODBII models to fake them into thinking you have cats on the car.
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From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Re: O2 Simulators for Lt-1 92-96??? (Vette92)
So, are you sayin I need to wire in a loop in the circuit or just take em off and leave it all alone?
Thanks in advance
Thanks in advance
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Re: O2 Simulators for Lt-1 92-96??? (VictorRussell'92)
Your gas milage will suffer and you will not pass a sniffer emissions test, but yes, just unplug the O2 sensors and tie up the wires. You may want to put some rubber tape over the ends to protect the contacts. Then you can simply plug the O2 holes or leave the O2s where they are. No need to wire anything up and it will run in PE (Power Enrichment) mode all the time.
Melting Slicks
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Re: O2 Simulators for Lt-1 92-96??? (VictorRussell'92)
O2 sims are for 96 Vettes with four O2 sensors. The rear O2 sensors are to monitor the performance of the catalytic converter and have nothing to do with closed loop peformence. If you remove the cats you'll need to replace the rear O2 sensors with simulators or have the check for rear O2 sensors programed out. This is only an issue with 96 and up Vettes.
The O2 sensors in front of the cats are critical to the performance of any LT1/4. Don't remove them and run open loop. You want the O2 sensors for close loop control at part throttle.
Eric
The O2 sensors in front of the cats are critical to the performance of any LT1/4. Don't remove them and run open loop. You want the O2 sensors for close loop control at part throttle.
Eric
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Re: O2 Simulators for Lt-1 92-96??? (VictorRussell'92)
:iagree: You really need the O2 sensors for peak performance. They're ignored at wide open throttle but your part throttle driveability would be terrible and so would your gas mileage.
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Re: O2 Simulators for Lt-1 92-96??? (silver & red CE)
The O2 sensors in front of the cats are critical to the performance of any LT1/4. Don't remove them and run open loop. You want the O2 sensors for close loop control at part throttle.
Melting Slicks
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Re: O2 Simulators for Lt-1 92-96??? (Vette92)
Many people, including myself, run open loop all the time with excellent "performance" but simply with poor gas milage.
Why run rich if you can avoid it? Is there some extra performance? ZO6 cars are running over 400 RWHP through a MAF with O2 sensors and closed loop performance.
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Re: O2 Simulators for Lt-1 92-96??? (silver & red CE)
Why run rich if you can avoid it? Is there some extra performance? ZO6 cars are running over 400 RWHP through a MAF with O2 sensors and closed loop performance.
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Re: O2 Simulators for Lt-1 92-96??? (Nathan Plemons)
My O2's did not foul out from running rich, but they did go out causing me to run super lean. Also, it does not run super fat because it still uses the fuel map based on MAP pressure. It simply does not try to adjust the air fuel as you are driving along. Bypassing the O2's also alleviated a problem I was having when it went from open to closed loop. The O2 sensros would try to lean it out so bad that it would cause the car to stumble and sometimes die. The O2's were providing false information to the computer. At the sugestion of my mechanic, we just unplugged them and it has been running like a champ ever since without a hickup. It was not that long ago so I can not give you long term effects, but I can tell you it is going to stay like this for a while.
For the daily driver I would not really suggest this approach, but it is working well for me so far. I know countless others with large cams, big motors, and custom setups that are also running in closed loop because of programming issues. It is easier to program just for the open loop conditions and get it close than it is to program for both open and closed. Some will scoff at this, but that is fine.
Chris
Chris
For the daily driver I would not really suggest this approach, but it is working well for me so far. I know countless others with large cams, big motors, and custom setups that are also running in closed loop because of programming issues. It is easier to program just for the open loop conditions and get it close than it is to program for both open and closed. Some will scoff at this, but that is fine.
Chris
Chris
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Re: O2 Simulators for Lt-1 92-96??? (Vette92)
Hey, you've gotta do what works. I just can't imagine a properly working O2 sensor causing a car to run so poorly. It's been my experience that they can actually correct enough to make a car run pretty well in closed loop even on an extensively modified car that runs like crap in open loop.
By removing them you've just got computer controlled fuel delivery based on certain values. It doesn't have a way to check itself. If your program is good enough for the conditions you drive under it should work just fine. It's like having a carb that can re-jet itself depending on load.
By removing them you've just got computer controlled fuel delivery based on certain values. It doesn't have a way to check itself. If your program is good enough for the conditions you drive under it should work just fine. It's like having a carb that can re-jet itself depending on load.
