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So are these good or bad readings? The images are the post cat o2. The front O2 looks normal I think, not much to interpret.
These are what it looks like on the freeway, which I thought were good.
[IMG]http://i42.tinypic.com/dxivcm.jpg[/IMG]
[IMG]http://i39.tinypic.com/orrm6p.jpg[/IMG]
[IMG]http://i44.tinypic.com/2z7iz5z.jpg[/IMG]
In the previous images the readings would stay in a high or low range depending on how much work the engine was doing…low voltage at low rpms etc
I need to get a pic uploaded of what it looks like revving in the driveway…stay tuned for that. Looking forward to your opinionsI will keep you posted, I tried testing again last night to get some picks of the sensor output…it looked like it wasn’t working, the amplitude was big again. I will get pics up soon to get your opinions.
I will keep you posted, I tried testing again last night to get some picks of the sensor output…it looked like it wasn’t working, the amplitude was big again. I will get pics up soon to get your opinions.
I am not sure about the speed of switching but the amplitudes are different. It was that the rear moved up and down in large swings like 0.7 volts but was very erratic. Now the amplitude is like .2 but it does switch in a sine wave. I can’t plot 2 at once, but if I get a chance I will take a photo of the two at hopefully similar conditions.
I am not sure about the speed of switching but the amplitudes are different. It was that the rear moved up and down in large swings like 0.7 volts but was very erratic. Now the amplitude is like .2 but it does switch in a sine wave. I can’t plot 2 at once, but if I get a chance I will take a photo of the two at hopefully similar conditions.
Great, thanks Eric. I found out also that I was maybe misreading my scan tool, which lead me to believe the catalyst monitor was not “ready”.
I bought a Creader V and under I/M readiness it has 2 places it lists for the catalyst. In the first position it states
supp: not complete
the second listing says
stat: complete
I plugged the scanner into a couple of other cars with no probs and it always lists the catalyst “supp” as “not complete”.
I am guessing it’s just a bug with that model scanner, and “Stat” is the one I want to look at. I’m assuming they stand for “supported” and “status”.
I am very surprised if this fix worked. Thanks for the help and all your great vids!Great, thanks Eric. I found out also that I was maybe misreading my scan tool, which lead me to believe the catalyst monitor was not “ready”.
I bought a Creader V and under I/M readiness it has 2 places it lists for the catalyst. In the first position it states
supp: not complete
the second listing says
stat: complete
I plugged the scanner into a couple of other cars with no probs and it always lists the catalyst “supp” as “not complete”.
I am guessing it’s just a bug with that model scanner, and “Stat” is the one I want to look at. I’m assuming they stand for “supported” and “status”.
I am very surprised if this fix worked. Thanks for the help and all your great vids!The behavior of the rear o2 sensor looks different than it did before. It used to fluctuate from .1 to .9 during all sorts of conditions. now it is a much tighter sine wave, but it’s range depends on how much throttle I give it. So at idle it’s between .1 and .18 and at around 2000rpms its between .4 and .6. And on a lot of gas it’s .7 to .9
Is that the proper way it should function? In Eric’s vid I just remember it was supposed to stay around .45 at 2000rpms.
Anyways, I still haven’t been able to set the catalyst monitor to “ready” after a few more attempts at replicating this drive cycle. So we’ll see. If the detergent worked I will be amazed banana:The behavior of the rear o2 sensor looks different than it did before. It used to fluctuate from .1 to .9 during all sorts of conditions. now it is a much tighter sine wave, but it’s range depends on how much throttle I give it. So at idle it’s between .1 and .18 and at around 2000rpms its between .4 and .6. And on a lot of gas it’s .7 to .9
Is that the proper way it should function? In Eric’s vid I just remember it was supposed to stay around .45 at 2000rpms.
Anyways, I still haven’t been able to set the catalyst monitor to “ready” after a few more attempts at replicating this drive cycle. So we’ll see. If the detergent worked I will be amazed banana:I have re-installed my old cat that i soaked in laundry detergent :unsure: I am trying to make sense of my diagnostics but need some help
1.) The rear 02 sensor fluctuates from 0.1 v to 0.9 v in a nice sine wave, but the outlet of the CAT is at least 100degrees hotter than the inlet. Is this CAT bad? that’s conflicting results right?
2.) How strictly do you need to follow drive cycle instructions to reset monitors to ready? I performed the catalyst drive cycle twice and can’t get a ready mode. If it says drive 40 mph for 7 mins am I ever allowed to slow down or vary my speed? It’s pretty hard to find a stretch of road with no traffic around here that’s not the freeway. I’m not drivin 40 on the freeway.
3.) anybody know where to find drive cycle for a 1995.5 Tacoma? I am using data for a 96, probably the same but not sure.
I have re-installed my old cat that i soaked in laundry detergent :unsure: I am trying to make sense of my diagnostics but need some help
1.) The rear 02 sensor fluctuates from 0.1 v to 0.9 v in a nice sine wave, but the outlet of the CAT is at least 100degrees hotter than the inlet. Is this CAT bad? that’s conflicting results right?
2.) How strictly do you need to follow drive cycle instructions to reset monitors to ready? I performed the catalyst drive cycle twice and can’t get a ready mode. If it says drive 40 mph for 7 mins am I ever allowed to slow down or vary my speed? It’s pretty hard to find a stretch of road with no traffic around here that’s not the freeway. I’m not drivin 40 on the freeway.
3.) anybody know where to find drive cycle for a 1995.5 Tacoma? I am using data for a 96, probably the same but not sure.
Alrigth, great guys. I have the cat in some detergent water soaking right now, and I have minimal hope that will result in a fix, but I will update here with my results. From more research I leaned that it’s usually not the crudding up of the honeycomb that ruins the cat, it’s the breakdown of the metals or ceramic within it. So even if the cleaning did work, it couldn’t fix it. But it’s worth a try
Alrigth, great guys. I have the cat in some detergent water soaking right now, and I have minimal hope that will result in a fix, but I will update here with my results. From more research I leaned that it’s usually not the crudding up of the honeycomb that ruins the cat, it’s the breakdown of the metals or ceramic within it. So even if the cleaning did work, it couldn’t fix it. But it’s worth a try