Wanted: Medium and large bore restrictors for Vibrant J-style O2 sensor spacers

[hmuller]

Had my shop install Vibrant J-style O2 sensor spacers with the smallest hole restrictors on my APR downpipes on the S6. Unfortunately, they discarded the other two size restrictors. Still get CEL as soon as the oxygen sensor readiness sets. So I would like to try the other two sizes of restrictors. By chance, does anyone who successfully installed the smallest hole restrictor have the other two sizes left over? Would be happy to pay a few $ plus shipping.

Update: Problem solved. My rear oxygen sensors were swapped left to right when I had my downpipes installed. Last week I had my shop swap them to the correct position and no more CEL after 3-4 days now driving around on the stock file.

[gimpgutter]

I have both sitting in my garage (see my reply to your other thread). I'm located in Toms River. If you pay shipping or want to meet up, I'm willing to give them to you for free.

Shoot me a PM.

[thorlax240]

So I have the APR downpipes without restrictors without CEL- what's the benefit?

[hmuller]

So I have the APR downpipes without restrictors without CEL- what's the benefit?

You don't get a CEL after switching to the stock file to allow oxygen sensor readiness bits to set? Lucky you. Not sure about MA state inspection but NJ state inspection includes CEL and OBDII hookup to check for readiness. Most people need O2 spacers with flow restrictors to get readiness set without CEL.

[thorlax240]

You don't get a CEL after switching to the stock file to allow oxygen sensor readiness bits to set? Lucky you. Not sure about MA state inspection but NJ state inspection includes CEL and OBDII hookup to check for readiness. Most people need O2 spacers with flow restrictors to get readiness set without CEL.

So I actually have to swap my stock downpipes in every year for an inspection otherwise it won't pass. I've been told that even with stock file, you the restrictors don't work to show they're readiness. If my shop was wrong in telling me this I'd explore this option. What direction can you give me on the best option here? Any downsides? If I can avoid the annual $1,000 fee that'd be solid.

[hmuller]

So I actually have to swap my stock downpipes in every year for an inspection otherwise it won't pass. I've been told that even with stock file, you the restrictors don't work to show they're readiness. If my shop was wrong in telling me this I'd explore this option. What direction can you give me on the best option here? Any downsides? If I can avoid the annual $1,000 fee that'd be solid.

Ouch. Swapping downpipes every year. At least NJ state inspection is only every two years but still. Many people here have had good luck using Vibrant J-style oxygen sensor spacers with the smallest hole flow restrictor to avoid CEL on the stock file to allow readiness bits to set (or to avoid CEL with the EPL tune that doesn't code out the rear O2 sensors). In my case, I can get the O2 sensor heater readiness to set but as soon as the oxygen sensor readiness sets I get the CEL. So I would like to try the other size flow restrictors but my shop has discarded them when they installed the spacers (check out my thread in the main forum; there is also a link to another thread discussing the O2 sensor spacers and CEL).

[daytona rs7]

So I actually have to swap my stock downpipes in every year for an inspection otherwise it won't pass. I've been told that even with stock file, you the restrictors don't work to show they're readiness. If my shop was wrong in telling me this I'd explore this option. What direction can you give me on the best option here? Any downsides? If I can avoid the annual $1,000 fee that'd be solid.

there's plenty of people in the car world that run test pipes and O2 sensor spacers in order to trick the ECU. There is most definatly an option of the correct spacer and restrictor that will allow readiness with the stock tune and test pipes. just might be trial and error to see what works with your car

it will be worth your time in the long run. i can only imagine the cost of labor for downpipes removal and reinstall every year.

[MolonLabe300]

So I had this same issue with Milltek DP's. I also have a state inspection every year that checks for cats and O2 readiness. I used the Vibrant J O2 spacers with the smallest insert. Switched the APR file to stock and then connected my Torque OBD dongle and drove like a granny for about :30min as soon as it read that the OBD test completed I had the test ran with a pass. I have the other inserts as well. They are yours if you need them just PM me.

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[low-profile]

Are you getting a code on both sides?
Just my .02, the small restrictor is most likely not your issue. I would spend my time checking the sleeve clamp and possibly adding a small bead of exhaust sealant to it.


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[hmuller]

Good point. First time the fault code was for sensor B2 S2 and the second time it was for sensor B1 S1. I'll have my shop check the sensors next time I go there.

[Chris@EPL]

S1 codes are very bad as those are the used for the main fueling for the car. S1 codes probably mean that the sensor is going or went bad. there are no spacers on the S1 sensors. Also make sure that the shop routed the sensors the correct way after installing the DPs. The S2 sensors need to switch sides with aftermarket DPs versus the stock DPs.

[hmuller]

S1 codes are very bad as those are the used for the main fueling for the car. S1 codes probably mean that the sensor is going or went bad. there are no spacers on the S1 sensors. Also make sure that the shop routed the sensors the correct way after installing the DPs. The S2 sensors need to switch sides with aftermarket DPs versus the stock DPs.

I assume the S1 sensors are those before the cats and are not coded out in your competitor software. I never saw a fault code for them while on the tune file just after switching to the stock file. Anyway, I'll definitely keep an eye on sensor fault codes and have my shop check them when I go there next time. Since I'm due for my yearly oil change I'll probably be there in a few weeks.

[hmuller]

Problem solved. My rear oxygen sensors were swapped left to right when I had my downpipes installed. Last week I had my shop swap them to the correct position and no more CEL after 3-4 days now driving around on the stock file.