Is there a use for a 2GR ECU able to pass all monitors with only catalytic converters - MR2 Owners Club Message Board
 
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post #1 of 8 (permalink) Old September 10th, 2019, 19:32 Thread Starter
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Is there a use for a 2GR ECU able to pass all monitors with only catalytic converters

A customer sent me an invalid core and i did some messing around with it and i was able to get it to fire without an immobilizer and then i decided to confirm the evap monitor stuff not being there on Australian cars.



Ignore the MIL state, i haven't done a single thing to the tune yet.

Notably, this is the same monitors that the Evora would have since they do not have an evap system.

It would be a fair bit of work to translate my tune over to that new ECU but if there's a demand for it i could certainly do it.
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post #2 of 8 (permalink) Old September 11th, 2019, 02:37
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Well yeah I'd say that could come in handy...
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post #3 of 8 (permalink) Old September 11th, 2019, 06:55 Thread Starter
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Well yeah I'd say that could come in handy...
In which way could it come in handy? The only way i could see it helping with California CARB emissions people is if i make it available with zero modifications other than the immobilizer removal. In this case you would have to use a transmission simulator to remove those fault codes but with those and the catalytic converter you'd have a matched checksum(unmodified) tune with no faults and all the monitors passed but it would not be an american tune so CARB would still not like it.

Is there a locale that does emissions by checking the monitors but not the checksums? if so i can make a few tweaks like the rev limiter MAF calibration but otherwise leave emissions equipment and checks unaffected. As far as i know such a locale does not exist but i asked this out here since i'm really not the authority on emissions regulations in all areas.
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post #4 of 8 (permalink) Old September 20th, 2019, 08:36
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Mark, does this mean the new 2GR ECU from you will pass California Smog?
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post #5 of 8 (permalink) Old September 20th, 2019, 09:38 Thread Starter
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Mark, does this mean the new 2GR ECU from you will pass California Smog?
As far as i know, the only way i could make a 2GR ECU pass CARB regulations is by getting an E.O. approval on the modified ECU tune. I'm pretty sure even if this rav4 tune had no automatic transmission stuff you could not pass CARB with an Australian ECU tune.

But that's why i started this thread, i live in Indiana, not California or other emissions controlled locales. If this would be helpful to someone please speak up so i can help people out.
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post #6 of 8 (permalink) Old September 20th, 2019, 22:06 Thread Starter
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So I gave a call to SEMA people a few hours earlier today. I talked to one of their California CARB specialists and asked if it would be possible to get a CARB E.O. for the following changes:

1)I need to modify the stock tune to remove the automatic transmission
2)I need to modify the stock tune to remove the evap subsystem (except for the purge valve)
3)The front catalytic converter needs to be cut & angled to miss parts of the car.

If i'm honest I did it to finally get a "yeah, no, there's not a snowball's chance in hell of any of that getting past CARB" so i could finally put an end to that discussion.

Yes, I realize that technically the evap system can be swapped in but a modern evap test is very likely to be reporting small and gross leaks on a very regular basis simply because of how many joints there are in the fuel system.

What they told me is that while modifying the cat position is not possible normally, when trying to get an E.O. it's a complete non-issue as long as it does not modify how the emissions equipment actually works.

But what i was blown away to hear is that the tune modifications actually have a chance of being accepted. The vehicle would get tested at many different load levels including up to 80% of rated horsepower and actual emissions measured. If actual emissions are to their liking you can then get an E.O. assigned to the combination of parts. At that point it would be easy for anyone in California to do a 2GR install with a manual, catalytic converters, my ECU and MAF tube.

But here's the rub, it takes a lot of lab time and applications to CARB to potentially get everything to where they are happy with it. I'd also need to actually build a car for them to test and get it from Indiana to California. There's no exact number on the cost, it could be as low as $5k, more likely to be about $20k and you could spend and spend and never actually get to a E.O. number.

At this point this is all 3rd party discussions but i did get some CARB contacts that i will reach out to in order to verify these details a bit.

I don't think i could pull this all together myself but if someone in CA is interested in helping with this I'd be happy to help however i can.
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post #7 of 8 (permalink) Old September 21st, 2019, 04:03
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Well I'd certainly like to be helpful here... PM me once you find out more. It does look like a rear manifold will fit in the front with a slice and re-weld to angle the pre-cat back about 20 degrees (to clear the frame). The OEM front manifold is a no-go as it interferes with the clutch and shift hardware.

Last edited by JimKing; September 21st, 2019 at 04:07.
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post #8 of 8 (permalink) Old September 21st, 2019, 10:31 Thread Starter
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Well I'd certainly like to be helpful here... PM me once you find out more. It does look like a rear manifold will fit in the front with a slice and re-weld to angle the pre-cat back about 20 degrees (to clear the frame). The OEM front manifold is a no-go as it interferes with the clutch and shift hardware.

I'll have to check again but i'm 90% sure that if we use the right manifolds we can leave the rear 100% intact and do a cut & reweld on the front to change the angle and miss the clutch slave cylinder.

The big issue with doing this is going to be the only way to recover cost will be by selling that E.O. compatible ECU so that will have to be expensive depending on how much this all costs to do.
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