I have a Cobb catted downpipe, 200 cell, that I'd like to install in the near future. Turbo will be stock, likely a Stratified tune, & the Vortech FMIC (autox rules for STH class). What sort of defouler should I use or is it even necessary?
Need guidance on defouler
gemery
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Doesn't matter, but mine is pointed forward.
Thanks Coach!
Here is the video I followed, step by step:
You want it facing upstream, use the video for reference when actually under the car just to confirm the right way, but I did that and all has been great never throws any codes or anything.
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Defouler end should point upstream. Gonna do mine shortly. Anyone know which size insert would work best for a Mountune 200 cell catted DP? I'm guessing the middle one.
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I'm using the middle size on a cat-less down pipe; no codes.
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Would the O2 sensor not respond or throw a code if it the flow weren't enough? My thought here being that a mid-sized restrictor could be too much restriction when used in a 200 cell cat--this is assuming my first question is true.
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I believe just the opposite; it would give a code if there was too much flow and the o2 sensor got a good whiff of what is really going on.
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When you're done can you post up what insert you used with the Mountune DP and whether it threw a code or not. I will be installing mine at some point and was going to use the middle one but will wait and see how yours turns out.
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Absolutely. Check my most recent OP as I'll be updating that one for sure in the future. I'll try to remember to reply here, though.When you're done can you post up what insert you used with the Mountune DP and whether it threw a code or not. I will be installing mine at some point and was going to use the middle one but will wait and see how yours turns out.
Are you having a code with that Mountune 200 downpipe?
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Yes, but only after I went to Cobb Stage 1. 99% sure the car was on stock software and it never threw a CEL prior. Code is P0420. Odd.
Check in on my most recent OP in a few days as I should have the defouler installed. It's supposed to arrive tomorrow, so I'll install that this weekend provided I have the time. Also should receive a Depo 3.5" intercooler tomorrow, so if you're interested in that product I'll probably do an install and review post soon. Expect a Stratified Stage 3 tune review as well within a month along with some logged 0-60 times as my buddy has a Racebox. Thus far I've managed a 5.89 on damp tarmac
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Gonna try to install the defouler today along with my FMIC. Anyone know if there are preferred torque specs for the defouler/O2 sensor? Don't want it jiggling loose. I plan on using the smallest restrictor as there's no downside and I don't want to risk having to do it again. Wouldn't be fun. Could I use blue Loctite 242?
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@CryMeARiver , you're thinking about it the wrong way man. Anti-seize, not a thread sealant. The metal will expand once hot (downpipe will get extremely hot!) & pretty much bind the threads much tighter. You may have a need to remove the sensor down the line 😉
I don't know what the perfect torque spec is, but the classic German method of "goowd ant tiight" with a decent wrench hasn't failed me yet. Definitely don't over torque, so a wrist break method is advised (unless of course you dig up proper torque specs for the compatible threading).
I don't know what the perfect torque spec is, but the classic German method of "goowd ant tiight" with a decent wrench hasn't failed me yet. Definitely don't over torque, so a wrist break method is advised (unless of course you dig up proper torque specs for the compatible threading).
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Yes. You can set "02 slow response" codes by running too small of an insert. I have a J defouler with no insert on my catted downpipe and it's been fine for 30k miles, stock tune and two EPA compliant big turbo tubes.
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I would try the middle one before the smallest/most restrictive one since the smallest is probably more for a catless dp and definitely use some anti-seize. I believe some even get a spare O2 sensor just in case it breaks.
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Gonna install it by this Sunday as I was cut for time this weekend. I'll try the middle of the three restrictors. I'll make sure to use anti-seize; got a preferred brand?
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Okay, so in that case would it make the most sense to start with the freest-flowing restrictor and then work up? If the rest of my emissions checks are good-to-go would I immediately see a change in the status once I swap in the right size or would I have to wait for another drive cycle? This is assuming I don't reset the ECU.
2014.5 ST3: 200 cell DP, res delete, MBRP intake, charge pipes/tubing, random other stuff
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Ordered some Permatex, which is good for O2 sensors.
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dont get anti seize on the sensors end, just a dab on the threads!
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