Welcome to the club!
:eusa_wall: :icon_beatdeadhorse: :eusa_wall:

 

In anticipation of some of your answers, I went ahead and bought both gaskets from 1sttoyotaparts.com. For those of you who don't know, 1sttoyotaparts.com is a great website for buying OEM stuff.

 

You say you have a PPE "Down Pipe"; is it a hi-flow cat or is it a "test pipe"?

 

<div class='quotetop'>QUOTE (Galo @ Apr 12 2009, 07:20 PM) <{POST_SNAPBACK}></div>

You say you have a PPE "Down Pipe"; is it a hi-flow cat or is it a "test pipe"?[/b]

I don't have the high-flow cat so I think I have the "test pipe." I've always referred to it as a straight pipe or down pipe. I don't have a cat, but I thought that you could still avoid throwing a CEL as long as you wired up everything correctly.

 

<div class='quotetop'>QUOTE (youpaiyou @ Apr 12 2009, 07:23 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (Galo @ Apr 12 2009, 07:20 PM) <{POST_SNAPBACK}>

You say you have a PPE "Down Pipe"; is it a hi-flow cat or is it a "test pipe"?[/b]

I don't have the high-flow cat so I think I have the "test pipe." I've always referred to it as a straight pipe or down pipe. I don't have a cat, but I thought that you could still avoid throwing a CEL as long as you wired up everything correctly.
[/b][/quote]
Didn't read your original post (what can I say I'm lazy) but unless you have a MIL elimator for the post cat sensor you will throw a P0420. What you need to do is get two spark plug anti foulers and follow this procedure. You should be good to go.

http://spyderchat.com/forums/index.php?sho...38&hl=spark

If you do have a MIL elimator for the post cat sensor then ignore my post.

 

On March 25 I posted this to you.. Did you do It?..

Cap



Mar 25 2009, 10:53 AM
Post #5

Senior Enthusiast
Group: Members
Posts: 634
Joined: 18-May 08
From: Central California Coast
Member No.: 10,879


420 is a Main Cat 'Type' of problem.. It's not Seeing the 'Proper' voltage Swings from the O2 Sensor located after the main Cat. Usually encountered when installing Aftermarkett Exhaust Stuff.. You can Try and Re-Place the 'After Cat' sensor ( The one that Plugs in behind the Drivers Side Tail Lite ).. or replace the Main Cat ( $1200!!!) But the 'Normal Fix' is to use the 'Spark Plug Anti Fowler' that has been drilled with a Larger hole inside it to accept the 'Nose' of the O2 Sensor.. Then you just Screw it on to the Stock O2 Sensor as an 'Extension' .. this gets the O2 Sensor Out of the 'Exhaust Gas Stream' and it becomes 'Happy' sniffing slower moving Gasses.. Then no Cel..

Cap

 

<div class='quotetop'>QUOTE (Cap Weir @ Apr 12 2009, 09:04 PM) <{POST_SNAPBACK}></div>

On March 25 I posted this to you.. Did you do It?..

Cap



Mar 25 2009, 10:53 AM
Post #5

Senior Enthusiast
Group: Members
Posts: 634
Joined: 18-May 08
From: Central California Coast
Member No.: 10,879


420 is a Main Cat 'Type' of problem.. It's not Seeing the 'Proper' voltage Swings from the O2 Sensor located after the main Cat. Usually encountered when installing Aftermarkett Exhaust Stuff.. You can Try and Re-Place the 'After Cat' sensor ( The one that Plugs in behind the Drivers Side Tail Lite ).. or replace the Main Cat ( $1200!!!) But the 'Normal Fix' is to use the 'Spark Plug Anti Fowler' that has been drilled with a Larger hole inside it to accept the 'Nose' of the O2 Sensor.. Then you just Screw it on to the Stock O2 Sensor as an 'Extension' .. this gets the O2 Sensor Out of the 'Exhaust Gas Stream' and it becomes 'Happy' sniffing slower moving Gasses.. Then no Cel..

Cap[/b]

Yes and no. I replaced the "after cat" sensor but I did not install the spark plug anti-fouler because I can switch to the PowerFC and no CEL will come on. Isn't it possible to get no CEL without installing the anti-fouler? If so, that's my goal.

 

<div class='quotetop'>QUOTE (darkday @ Apr 12 2009, 08:40 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (youpaiyou @ Apr 12 2009, 07:23 PM) <{POST_SNAPBACK}>

<div class='quotetop'>QUOTE (Galo @ Apr 12 2009, 07:20 PM) <{POST_SNAPBACK}>

You say you have a PPE "Down Pipe"; is it a hi-flow cat or is it a "test pipe"?[/b]

I don't have the high-flow cat so I think I have the "test pipe." I've always referred to it as a straight pipe or down pipe. I don't have a cat, but I thought that you could still avoid throwing a CEL as long as you wired up everything correctly.
[/b][/quote]
Didn't read your original post (what can I say I'm lazy) but unless you have a MIL elimator for the post cat sensor you will throw a P0420. What you need to do is get two spark plug anti foulers and follow this procedure. You should be good to go.

http://spyderchat.com/forums/index.php?sho...38&hl=spark

If you do have a MIL elimator for the post cat sensor then ignore my post.
[/b][/quote]


Thanks Darkday. I have read that post before today, but for some reason it means more to me now.

Forget everything before this post. I guess I really only have 1 question: If you use a down pipe (no cat) are you always going to get the P0420 code unless you use the anti-fouler?

 

<div class='quotetop'>QUOTE </div>

Forget everything before this post. I guess I really only have 1 question: If you use a down pipe (no cat) are you always going to get the P0420 code unless you use the anti-fouler?[/b]

Yeah you have two options to either get an anti-fouler or a resistor to take the place of the sensor. Without either of those you're going to throw a P0420.

 

<div class='quotetop'>QUOTE (darkday @ Apr 12 2009, 08:33 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE

Forget everything before this post. I guess I really only have 1 question: If you use a down pipe (no cat) are you always going to get the P0420 code unless you use the anti-fouler?[/b]

Yeah you have two options to either get an anti-fouler or a resistor to take the place of the sensor. Without either of those you're going to throw a P0420.
[/b][/quote]

The PPE O2 conditioner is the same as the MIL resistor but I'm still throwing the P0420. I'll double check the O2 conditioner connection and if that doesn't work I'll see if the anti-foulers do the trick. Thanks.

 

<div class='quotetop'>QUOTE (youpaiyou @ Apr 12 2009, 08:49 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (darkday @ Apr 12 2009, 08:33 PM) <{POST_SNAPBACK}>

<div class='quotetop'>QUOTE

Forget everything before this post. I guess I really only have 1 question: If you use a down pipe (no cat) are you always going to get the P0420 code unless you use the anti-fouler?[/b]

Yeah you have two options to either get an anti-fouler or a resistor to take the place of the sensor. Without either of those you're going to throw a P0420.
[/b][/quote]

The PPE O2 conditioner is the same as the MIL resistor but I'm still throwing the P0420. I'll double check the O2 conditioner connection and if that doesn't work I'll see if the anti-foulers do the trick. Thanks.
[/b][/quote]
Isn't that bit for the header sensors though? I've forgotten how the PPE is setup though I guess.

 

<div class='quotetop'>QUOTE (darkday @ Apr 12 2009, 10:16 PM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (youpaiyou @ Apr 12 2009, 08:49 PM) <{POST_SNAPBACK}>

<div class='quotetop'>QUOTE (darkday @ Apr 12 2009, 08:33 PM) <{POST_SNAPBACK}>

<div class='quotetop'>QUOTE

Forget everything before this post. I guess I really only have 1 question: If you use a down pipe (no cat) are you always going to get the P0420 code unless you use the anti-fouler?[/b]

Yeah you have two options to either get an anti-fouler or a resistor to take the place of the sensor. Without either of those you're going to throw a P0420.
[/b][/quote]

The PPE O2 conditioner is the same as the MIL resistor but I'm still throwing the P0420. I'll double check the O2 conditioner connection and if that doesn't work I'll see if the anti-foulers do the trick. Thanks.
[/b][/quote]
Isn't that bit for the header sensors though? I've forgotten how the PPE is setup though I guess.
[/b][/quote]

No, well at least I'm pretty sure it's not. The header sensor requires a modification but not an 02 conditioner. I checked my O2 conditioner and I had a loose wire. I plugged it back in and as of yet, no CEL. I think I fixed it! I'll update this thread in a few days.

 

I hsve the PPE O2 conditioner with no cel. Your loose wire had to be the problem.

 

<div class='quotetop'>QUOTE (vvt-mr2 @ Apr 13 2009, 11:03 AM) <{POST_SNAPBACK}></div>

I hsve the PPE O2 conditioner with no cel. Your loose wire had to be the problem.[/b]

Fudge! It came on again.




Vvt-mr2, you only have the 02 conditioner on the driver's side O2 sensor correct?

 

The P0420 code isn't specific to one O2 sensor right? I ask because I have no idea which 02 sensor is triggering the code.

 

No the conditioner goes on the Lower o2 sensor. The one that plugs in behind the drivers side tail light. That is were I spliced the wires, behind the tail light. I have had no problems with cels.

 

The po420 code is telling you that your cat is dead. Since you don't have one that is why you are getting the code. put the conditioner on the o2 sensor that screws into the down pipe.

 

That makes sense. An 02 conditoner for each 02 sensor since I don't have a cat.

 

No, You only need one conditioner. but it has to be on the sensor on your downpipe. The upflow sensor, I believe it's called.

 

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 09:14 AM) <{POST_SNAPBACK}></div>

That makes sense. An 02 conditoner for each 02 sensor since I don't have a cat.[/b]

You don't want to do that because the precat sensors are for fuel trims.

 

Ok, thanks guys. This information is helpful. I double checked the wiring to the driver's side 02 sensor and conditioner (I also spliced the wires behind the tail light) and it's fine. Thus, the P0420 code must be coming from the passenger side 02 sensor.

 

<div class='quotetop'>QUOTE (youpaiyou @ Apr 14 2009, 10:42 AM) <{POST_SNAPBACK}></div>

Ok, thanks guys. This information is helpful. I double checked the wiring to the driver's side 02 sensor and conditioner (I also spliced the wires behind the tail light) and it's fine. Thus, the P0420 code must be coming from the passenger side 02 sensor.[/b]

No it has to be coming from the post cat sensor because it's after the cat. Remember the 'precat' sensors are just seeing raw exhaust gasses which is why they can control the fuel trim. They have no idea if there's a cat there or not.

 

When you keep saying drivers side o2 conditioner, what do you mean? Are you talking about the resistor PPE supplies for the 2 to 1 o2 conversion? or do you have more than 1 conditioner?? Did you read the instructions supplied with the PPE setup?

 

<div class='quotetop'>QUOTE (vvt-mr2 @ Apr 14 2009, 09:44 AM) <{POST_SNAPBACK}></div>

No, You only need one conditioner. but it has to be on the sensor on your downpipe. The upflow sensor, I believe it's called.[/b]

I have the 02 conditioner on the 02 sensor that plugs into the down pipe. However, I am still getting the P0420 code. I'm checking my wiring harness again to make sure that it conforms with PPE's instructions.

 

Where is the the 3rd o2 sensor in your setup?

If its hanging in space then thats why the P0420 is popping up.

With the PPE harness you dont do any splicing of the post main cat O2 wires.