05 STS P0430 (bank 2 cat efficiency)

It's your engine, transmission, driveline
kevm14
Posts: 15200
Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

Not a bad article on this.
https://www.carid.com/articles/why-do-s ... rters.html
The 1990s brought a solution to both of the aforementioned challenges when automakers developed catalytic converters which were integrated into exhaust manifold assemblies. Early adopters of these space-saving integrated exhaust manifolds were mostly Japanese and European automakers who fitted them to smaller 4- and 5-cylinder inline engines.

Quick light-up time and smooth engine performance generated by this style of catalytic converter made them fast favorites of automakers from all over the globe. Soon, integrated exhaust manifolds were fitted to many larger inline-6, V6, and V8 engines as well. Fast forward to today, with our even stricter pollution standards, and these integrated exhaust manifolds are standard equipment on almost every new car and truck sold in the United States.
Random example: a 2002 Civic has a manifold integrated cat. Also a 2001 Infiniti QX4 (Pathfinder). I assure you Cadillac did not invent this.

In fact, that QX4 thread I found was from 2009. He had to replace his cats at 144k and only 8 years old.
bill25
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Joined: Thu Oct 31, 2013 2:20 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by bill25 »

I assure you Cadillac did not invent this.
I didn't think they did, I just don't like it. I have never replaced a manifold. I have replaced multiple cats. It is just cheaper to replace a cat vice a cat/manifold. I think cats are far more likely to fail than manifolds, so having to replace the manifold is kind of a waste. I am not saying it is a good time, but soaking with PB Blast a few times definitely helped.
kevm14
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Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

Oh wow.

http://www.caddyinfo.com/wordpress/cadi ... -motorama/

Maybe HP Tuners supports my car. Now this would be something to "solve" my problem.
kevm14
Posts: 15200
Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

Breakin' my balls here.

https://www.hptuners.com/products/vcmsuite_vehicles.php
07-10 STS 4.6
Well that's fabulous.
kevm14
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Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

http://www.cadillacforums.com/forums/ca ... chips.html
it hasnt been hacked by tuners (ie hptuners, westers garage, etc)
in late 06 they switched to the current PCM used in the V8 cars
Goddamnit! I'm guessing they didn't have an ECM that could handle the Northstar LH2 until late 2006. So it got something bespoke until then. Lucky me. It's not that it cannot be hacked, just that it is likely not worth it for tuning software companies.
kevm14
Posts: 15200
Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

Yeah the E67 was just a wee bit more common......
Gen IV V8, V6, L4 E67 ECM - Stream E67 Buy Now
V8 Cars
08 Buick Allure 5.3L
08-09 Buick Lacrosse 5.3L
06-09 Buick Lucerne 4.6L
06-07 Cadillac CTS-V 6.0L
08-15 Cadillac CTS-V 6.2L
06-09 Cadillac DTS 4.6L
06-10 Cadillac STS 4.4L, 4.6L
06-09 Cadillac XLR 4.4L, 4.6L
12-15 Chevrolet Camaro 6.2L
10-13 Chevrolet Corvette ZR1 6.2L
07-09 Chevrolet Impala SS 5.3L
07 Chevrolet Monte Carlo SS 5.3L
13-15 Holden HSV GTS (S/C) 6.2L
07 Pontiac Grand Prix 5.3L
V6 Cars
06 Chevrolet Impala 3.9L
09 Chevrolet Impala 3.5L
06 Chevrolet Malibu 3.9L
08-11 Chevrolet Malibu 3.5L, 3.6L (not DI)
12 Chevrolet Malibu LTZ 3.6L
06-08 Chevrolet Monte Carlo 3.9L
07-08 Chevrolet Monte Carlo 3.5L
06-09 Pontiac G6 3.6L, 3.9L (not DI)
07-09 Pontiac G6 3.5L
07-09 Saturn Aura 3.6L (not DI)
06-07 Chevrolet Cobalt 2.4L
06-07 Chevrolet HHR 2.2L, 2.4L
08 Chevrolet Malibu 2.4L
08-09 Chevrolet Malibu - Hybrid 2.4L
07 Pontiac G5 GT 2.4L
06-07 Pontiac G6 2.4L
06 Pontiac Pursuit 2.4L
06-07 Pontiac Solstice 2.4L
06-07 Saturn Aura 2.4L
08-09 Saturn Aura - Hybrid 2.4L
06-07 Saturn Ion 2.2L, 2.4L
07 Saturn Sky 2.4L
SUV's
08 Buick Enclave 3.6L (not DI)
07 Buick Rainier 5.3L
09 Cadillac Escalade - Hybrid 6.0L
07-09 Cadillac SRX 4.6L
08-09 Chevrolet Tahoe - Hybrid 6.0L
07-09 Chevrolet Trailblazer (4.2L 08-09 only) 4.2L, 5.3L, 6.0L
07-08 GMC Arcadia 3.6L (not DI)
07-08 GMC Envoy (4.2L 08-09 only) 4.2L, 5.3L, 6.0L
08-09 GMC Yukon - Hybrid 6.0L
08-10 Hummer H3 3.7L, 5.3L
08 Isuzu Ascender 3.6L (not DI)
07-09 Saab 9-7X (4.2L 08-09 only) 4.2L, 5.3L
07-08 Saturn Outlook 3.6L (not DI)
07-08 Saturn Vue 2.4L, 3.6L (not DI)
08-09 Saturn Vue - Hybrid 2.4L
Vans
06-07 Buick Terraza 3.9L
06-08 Chevrolet Uplander 3.9L
06-08 Pontiac Montana 3.9L
06-07 Saturn Relay 3.9L
Trucks
08-12 Chevrolet Colorado 2.9L, 3.7L, 5.3L
08-12 GMC Canyon 2.9L, 3.7L, 5.3L
08-09 Isuzu i-Series 2.9L, 3.7L
Non Production Vehicles
07-15 GM Performance Parts E67 ECM 6.0L, 6.2L, 7.0L
kevm14
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Joined: Wed Oct 23, 2013 10:28 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by kevm14 »

I added 12 more ounces of MMO to my mostly full tank. Recommended does is 8 oz in 20 gallons. So I put in maybe 60% more. Really interested if this did something to the cat. I'd like to think it would be temporary until something burns off. I just like living on the edge.
Adam
Posts: 2240
Joined: Wed Oct 23, 2013 9:50 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by Adam »

bill25 wrote:
I assure you Cadillac did not invent this.
I didn't think they did, I just don't like it. I have never replaced a manifold. I have replaced multiple cats. It is just cheaper to replace a cat vice a cat/manifold. I think cats are far more likely to fail than manifolds, so having to replace the manifold is kind of a waste. I am not saying it is a good time, but soaking with PB Blast a few times definitely helped.
Jenn's Civic has that.
Adam
Posts: 2240
Joined: Wed Oct 23, 2013 9:50 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by Adam »

Adam wrote:
bill25 wrote:
I assure you Cadillac did not invent this.
I didn't think they did, I just don't like it. I have never replaced a manifold. I have replaced multiple cats. It is just cheaper to replace a cat vice a cat/manifold. I think cats are far more likely to fail than manifolds, so having to replace the manifold is kind of a waste. I am not saying it is a good time, but soaking with PB Blast a few times definitely helped.
Jenn's Civic has that.
I meant a convert/manifold as one piece.
Adam
Posts: 2240
Joined: Wed Oct 23, 2013 9:50 pm

Re: 05 STS P0430 (bank 2 cat efficiency)

Post by Adam »

kevm14 wrote:I added 12 more ounces of MMO to my mostly full tank. Recommended does is 8 oz in 20 gallons. So I put in maybe 60% more. Really interested if this did something to the cat. I'd like to think it would be temporary until something burns off. I just like living on the edge.
Trying to make the light come back on?
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