IM240 emissions test for 1JZ

[stidnam]

Hi all,

In order to pass engineering I've been instructed to get an emissions test. I'm running a stock 1jz with factory computer, however the 3" exhaust and intercooler mean I need the test.

I'm booked in early next year but the meantime wanted to know if anyone else has done the test with a factory 1jz running an aftermarket cat and larger exhaust and did you pass?

Regards

stidnam

[lexsmaz]

Didn't think that would be enough to need an Engineer test, I would have thought so long as the Cat is in the same position as factory fitment & a Quality Cat too all should be good ..

The other option worth looking at is putting the stock exhaust & intercooler on it if you can or inquire through another Engineer ? ..

[fixeruperer]

Dam, they we're gonna bring the IM test here, but chose not too.
You sure ? Coz that test sucks.
Try another engineer, see if you can get away with a sniffer test or afr/dyno run.

[stidnam]

I should mention that the motor is in an RA28 celica so there is not factory exhaust to fit in place.

I have pointed out to the engineer that soarers etc are on the certified list of vehicles for import and hence would have had to meet emissions to pass certification. The engineer has said though that any change to emissions equipment including exhaust, intercooler and cat will require retesting of emissions.

[pete05]

what engineer are you using?

[George]

JZ's tend to show high CH emissions (say 500ppm for n/a, idle and 3000 RPM) due to throwing oil. In the worst case you'll need a new set of piston rings, stem seals and even turbocharger rebuild. Highly depends on the age and how hardly it has ben pushed before you bought it. Try to pass the test as is first.

[lexsmaz]

Sounds harsh for a 77 model car with a 91 onwards motor & ECU combo to have to jump through hoops like that, A engineer I spoke to some years ago here in Melbourne with the same combo you have was fine for even after market computers etc etc, I think from memory He said so long as it doesn't blow smoke its all good ...

Emission regulations on a 77 model car I think was only the carbon canister & hydro carbon readings, but they were pretty generous with their allowances on the hydro readings ..

["Z" UTE]

This sucks dude, what will the engineer expect you to do if the vehicle fails. Run an aftermarket ECU ! !. Honestly this fly's in the face of logic. Small wonder people do the shonk and don't bother engineering cars when you come up against this sort of ridiculous reasoning FFS,

[stidnam]

I'm going to refrain from mentioning the engineers name at this point. He has been fantastic to deal with so far and after reading all of the VSCCS documentation it would appear that any modification to the factory emission control equipment would require testing. Now I guess it comes down to the definition of emission control equipment.

It does appear that it's getting harder and harder to engineer cars in NSW. I guess you have to remember as well that an engineers certification can be subject to audit and they need to cover themselves to avoid any future trouble with the RMS.

lexsmaz - The emissions test is based on whichever is newer (car or engine). In this case it's the engine and must comply with emission standards up to 1996

"Z" Ute - That's an option I guess, however a 1jz should pass emissions testing with the right equipment. If it passed in a soarer which has been certified for import then surely one would think it'd be fine. The only issue I'll have is the 200 cell metal cat I'm running. Fingers crossed it'll do the job otherwise I may need to swap it out.

[Toy77]

hey Stid,

Yup you have exactly the same response i have gotten.

I havent emission tested my 1j yet, BUT i did get my dads 2j cressida put through.
We failed the im240 with the factory computer.
tried again with an autronic - better but still a fail.
then we put a late model commodore cat on it, and ran e85 - barely registered on the test.

Now to add to this i recieved some information the other day - the latest listing of what requires engineering and what doesnt - as well as sugestions of what proof is required for engineering.
When it get to emission changes etc, it mentions the im240 OR a 4 or 5 gas analyser check!
I have not ran that by my engineer yet (smashed the diff in my car doh) but will be interesting to see what they say.

My mates sr20 managed to pass the im240 on pump fuel - but he ran 2 cats.

Cheers
Stew

[dnegative]

A healthy engine running spot on with a new catalytic convertor that's efficient (so avoid those high flow sports ones) should pass a IM240 without issue, lots of 1JZ's have passed easily enough, they just need to be running spot on.

Pretty sure my 2JZ passed an IM240 with the stock ECU, a 3" exhaust and intercooler;
Would have to double check though.

[lexsmaz]

As far as I know / remember I thought it was the car age that's the base for the emissions hence you can't put an old motor in a newer car, ( that's here in Vic though ) ..

Hey Toy77 that's bullshit the things you had to do to pass your test, in Vic you would not be allowed to run an "adjustable" computer in a car as late as a Cressida, would have to be factory ECU only ..

Crazy how each State seems to do their own thing ..

And to add to what has been said make sure the Cat is up to Temp before you do the test & I would think if you are in doubt as to wether your cat would pass I would change it out as they most likely charge each time to do a test & I'm sure it's not cheap ..

[dnegative]

As far as I know / remember I thought it was the car age that's the base for the emissions hence you can't put an old motor in a newer car, ( that's here in Vic though ) ..

That's not a rule but it might as well be one;
You can mix and match whatever you want but it has to meet emissions of whatever is newer - so if you wanted to put a 4AGE in a GT86 the 4AGE would have to meet 2013 emissions standards........... not going to happen.

I think that only hurts V8 guys who want to put 350 chev's into things

[Toy77]

lexsmaz - they realised that most factory computers can be adjusted now days.... so no different to an aftermarket computer.

and the im240 test is free in nsw

[stidnam]

Thanks for the input guys. Interesting to hear that the 2j failed Toy77.

My engineer also mentioned the potential to do a 4 / 5 gas analyser test but did say that he wasn't aware of where they could be done yet. I'd be betting there would also be a cost involved given it'd be at a local workshop. With the IM240 test being free and the RTA advising me that it's part of the registration process then I'm going for a blat down there and we'll see how it goes. Heck it might be the only time I get to drive the car in awhile.

In other news though I've got a strange gurgling sound now in the 1j. Flushed the coolant system out a couple of times the other day, filled it with fresh coolant and now what sounds like air gurgling away. I've bled the system twice now on a nice incline and still can't get rid of it. If it turns out to be a BHG then I'm going to be more angry than a cut snake.

Stew - what diff did you brake and what part?