Downpipe CEL solution?

[Jesse DaBears]

The JB+ is fine (I have one and turned up the gain on it) , but it wont get you logging, more power, etc like the full blown JB4 unit will.

I bought one because it was something to tide me over until I could get a full tuning solution.

In regards your original question - I have used used ODB Fusion and Torque to clear emission codes on other cars with no issues, but not the Supra.

When will the code come back? Probably in a couple of days.

The other problem you will have is passing emissions testing if you have them in your province. When you clear the code, it puts your emissions tests in the ECU back in "not ready / learn mode" until you pass a certain amount of time driving, RPM changes, etc. During this time you will not be able to pass emissions.

What will happen when you meet all the requirements to pass the test in your ECU, is that it will set a check engine light and you are right back at square one.

If you want a catless downpipe on any car, you have two choices 1) A computer tune that removes the rear 02 sensor checks, or 2) some type of simulators/extenders that either modify voltage from the rear 02 sensors or extends the rear 02 sensors away from the downpipe.

On newer cars the simulators do not work that well, if at all. Your true solution is a full computer tune that deletes these rear 02 codes.

I dont really think people should recommend turning up boost without any way to monitor things. Just in terms of reliability and safety its not really a great idea. Thats why people have so many issues with products like racechips.

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[Bassoonytoon]

I dont really think people should recommend tuning up boost without any way to monitor things. Just in terms of reliability and safety its not really a great idea. Thats why people have so many issues with products like racechips.

That’s great to know. Thanks for the information!

 

[Bassoonytoon]

The JB+ is fine (I have one and turned up the gain on it) , but it wont get you logging, more power, etc like the full blown JB4 unit will.

In regards your original question - I have used used ODB Fusion and Torque to clear emission codes on other cars with no issues, but not the Supra.

When will the code come back? Probably in a couple of days.

Thank you so much! This is very helpful!

 

[MisterSkiz]

I dont really think people should recommend turning up boost without any way to monitor things. Just in terms of reliability and safety its not really a great idea. Thats why people have so many issues with products like racechips.

Correct - if you going to mess with the engine computer, make sure you have a way to monitor items - fuel trims, knock, etc.

 

[AHP]

You will not get a CEL with a GESI cat and it will make the same power on a stock turbo vs catless. Get the JB4 (and have Jesse tune it) or don't mess with the boost. Either is a fine option; the JB+ is not, IMO. The datalogging capability of the JB4 is worth a good portion of the cost of entry.

 

[Mimosa]

Do you have a link to the simulator? Supposedly they don't work well in this car - would be interesting to see which one you are using

https://www.armytrixusa.com/-p-1527...74sEGRYnaKFylNLJt9bjIEYQO0mw8uHUaAgStEALw_wcB

I have the ceramic coated version, but I think it's a bit too pricey for just having a coating added.

 

[MK52NV]

@zrk you think it’s a bad idea to run a catted DP/intake without jb4?… I have an active catted dp but haven’t installed due to not having jb4, wondering if it’s ok or I should wait

You will be fine to running a catted downpipe and intake you wont throw a code

 

[xplizitremix]

I've had the Armytrix catless DP w/ simulator for months and haven't had a CEL. This is with no tune at all.

which simulator did you buy? Did you need two? One for primary o2 and secondary o2 ?

 

[FLtrackdays]

Thank you so much! This is very helpful!

I have two friends that do not track or race. They were considering the same exact thing. Since it wasn’t on the forum and they know me, they took my advice and got the JB4 with a Jesse tune. Both guys (and myself included) were completely shocked at how much smooth power gains/delivery Jesse can get out of these JB4s. The standard maps aren’t even close.

So again, I’m like everyone else on here that has used Jesse. If you know someone local, ask them. And I’ve heard lots of peeps using after market catted downpipe without a CEL. Just go with one of those

 

[Mimosa]

which simulator did you buy? Did you need two? One for primary o2 and secondary o2 ?

Everything comes on the downpipe itself.

 

[jtsang25]

Is this a update issue. Or bimmerlink never could clear emissions related codes?

 

[Extreme Power House]

Is this a update issue. Or bimmerlink never could clear emissions related codes?

bimmerlink does not help with emission, and clearing the code does not either.

 

[jtsang25]

bimmerlink does not help with emission, and clearing the code does not either.

I know. But last time I cleared the CEL for O2 sensor is was gone for almost 2k miles. So I'm wondering if bimmer can clear it to. I'm okay with it coming back if it's 2k intervals.

 

[BMWAF]

But what do you do with the JB+ if you are over boosting or overshooting boost targets from a catless downpipe?

IMO tuning solutions is never something you should cheap out on. Its $678 + shipping for a JB4 but it can save you tons of headaches and $ if you have an issue.

I think the JB4 is in fact cheaping out. MHD/BM3 FTW. And besides, I still stand by the fact that bang for buck the JB+ really can't be beat.

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