Those with o2 spacers and CEL free

[cW6mT mKviGTi]

Remember guys, codes such as stuck lean and slow to respond means the o2 is not getting enough exhaust gas. So you will need a spacer with a larger, more direct opening to the exhaust gas flow.

Codes related to cat inefficiency or threshold codes mean you need to use a more restrictive spacer

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[Diggs24]

Remember guys, codes such as stuck lean and slow to respond means the o2 is not getting enough exhaust gas. So you will need a spacer with a larger, more direct opening to the exhaust gas flow.

Codes related to cat inefficiency or threshold codes mean you need to use a more restrictive spacer

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P2270 FWIW

 

[cW6mT mKviGTi]

Hey Diggs, it seems as though your o2 sensor isn't getting enough exhaust gases or there's a leak, I'm leaning towards you need a spacer that allows more exhaust gas to the o2 sensor.

That code usually triggers when the a/f sensor which is upstream of the o2 is calling for a richer mixture and the o2 sensor verifies that the mixture is relative to the a/f sensor demands.

Another forum member had a similar code where he had system slow to respond from lean to rich. He's running the same spacer as me so i recommended that he use the larger orifice insert instead of the middle sized unit.

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[Diggs24]

I'm leaning towards you need a spacer that allows more exhaust gas to the o2 sensor.

So, no spacer at all isn't enough exhaust to the sensor? Not sure how I can get more than that.

 

[Gawernator]

So, no spacer at all isn't enough exhaust to the sensor? Not sure how I can get more than that.

Possible you have a small leak? I ditched all the janky clamps and had a shop weld my entire system together for like $20

 

[Diggs24]

I guess? I replaced dp gasket. no other entry points except downstream of the sensor where the resonator clamps on.

 

[Gawernator]

I guess? I replaced dp gasket. no other entry points except downstream of the sensor where the resonator clamps on.

I didn't even replace that gasket.. whoops?

 

[cW6mT mKviGTi]

Are you still getting a lean code with no spacer?

I reused my downpipe gasket and my car has been fine so far :: knocks wood ::

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[Diggs24]

Are you still getting a lean code with no spacer?

I reused my downpipe gasket and my car has been fine so far :: knocks wood ::

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I get it no matter what is going into the bung. I have yet to try straight premium gas vs E30.

 

[cW6mT mKviGTi]

E30 could explain it... I'm not too familiar with JB4 but are there provisions for raising the fuel pump duty cycle, etc.?

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[Diggs24]

Yes, that could be it. Not much I can do about it.

 

[Gawernator]

Running E10 currently no CEL

 

[cW6mT mKviGTi]

I'm also running e10, I'm almost certain your lean code is related to the e30 mix.

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[marc5800]

Diggs - you try the mini-cat spacer? Still doesn't work?

Ends up I have to take my upper portion off in order to removed the Vibrant J-Style spacer and try something else or another orifice. I can't access it from the top

Debating just running the JB4 with Future Use D and forgetting about it lol

 

[Diggs24]

Diggs - you try the mini-cat spacer? Still doesn't work?

Ends up I have to take my upper portion off in order to removed the Vibrant J-Style spacer and try something else or another orifice. I can't access it from the top

Debating just running the JB4 with Future Use D and forgetting about it lol

Correct. Minicat did not work.