Emissions System Removal. Is it possible (1FZFE) ? (1 Viewer)

[Kawika]

I've searched, but haven't found much on the topic. Has anyone been able to remove a majority of the emission control systems on a 1FZFE, without negative consequences. I own a 1993 FJZ80, and live in Honolulu, HI. We have no smog testing, so I won't run into any legal problems.
I'd imagine that the computer would not be very happy after the removal of the various sensors.
Has anybody tried it?
Does anybody have a link to some one who has?

Thanks,
Kawika

 

[robbie]

You are correct that the computer would not like some things and it would not then get the best fuel ecomany. Not too much of that would happen here in the states. But that said, there is not ill effect on the engine to remove the Pair valve, but the cat may not work as efficently. If you do not have the temp sensor on the EGR valve, you could effeclty disconnect that with out upseting the computer, but you may create some engine damage depending on your engines overall operating functions. The egr is their to help with cooling the engine cylinder temps at certain times to help with emissions.
What are you actually trying to gain? If it is more power by striping the emissions systems, this in not that great of a idea. work with in the suggestions in the archives about getting more power for the best results. later robbie

 

[bjowett]

It should be possible... you may have to trick the ECU with a resistor or two. With that said, if all your emmisions parts are functioning, there probably won't be much to gain... maybe a little power from losing the converters.... I don't want to rain on your parade, but time could be better spent on other projects..... like 4.6 engines and turbo chargers!

Edit, Robbie beat me to it.

 

[Kawika]

Thanks for the replies. I was not looking to gain any horsepower. Gas is so expensive here that I try and keep my foot off the skinny pedal as much as I can. I'm actually trying to find a coolant leak and while looking for prices on various cooling system parts, I thought I'll take a look at emission control replacement parts. The damn things are expensive. I was starting to get worried that maybe my head gasket was gone (97,000 miles on the truck), and started to think if I need to take that much off the engine and I'm sure to break a bunch of vacuum hoses, why buy new hoses and why put the emission control systems back on. This was my logic anyway.
Besides, it would be nice to open up the hood and be able to identify every part without having to refer to the FSM. The engine compartment would look so much cleaner.
Does Toyota make a simpler (less emission systems) 1FZFE type motor that is used in other countries, or was the 1FZFE only offered in the USA?

Kawika

 

[landtoy80]

The ones in AU don't have egr on them. BUt you would have to get a Non-usa computer $$$.

 

[Kawika]

How much is $$$?
Kawika

 

[landtoy80]

How much is $$$?
Kawika

If you have to ask, you kant afford it

 

[cruiserdan]

Removall of the emission control devices is counter-productive and almost certainly illegal.

This is not 1975 and we are not dealing with after-thought band-aids. Modern engines are specifically designed with emission controls incorporated. Removing said devices does NOTHING to improve fuel economy or driveability. In fact, it is likely that engine performance and efficency will be degraded.

D-

 

[Jim_Chow]

When I replaced the cat on my 86 a few years ago, there was a slip of paper in the box that said it was against federal law to remove the cat unless by a certified shop, and it could only be done if the current cat were defective. There's also a card in there to record the vehicle's mileage/make/year and reason for the cat change. The shop needs to keep the cat for 15 days in case the EPA wishes to inspect it, and needs to keep the paperwork for 2 yrs. While mine was still working, the muffler shop could at least justify it in a 16 yr old vehicle (at that time), as cats are designed to last >> 100K mi. Also, I was replacing the old cat w/ a new cat.

I doubt many muffler shops would be willing to cut out the cat and not replace it...that would make them partially liable for knowingly violating the Clean Air Act of 1990 ($25K fine for businesses, $2.5K for you). Besides, if you're worried about gas costing too much, get a civic or prius.

 

[sc40]

Most Muffler Shops Here Will Do It If You Sign A Paper Stateing That It Is An Off Road Only (race Track Only) Whats The Harm In Asking?

 

[Tigerstripe40]

What about having the muffler shop install a test pipe and a few flanges?
Have the CAt bolted up for on the road driving, then remove the cat and put in the test pipe for offroading?

Is that legal, as long as you put the cat back in before hitting the road?

 

[Kawika]

My whole point with this thread was to gain some understanding in respect to how important the emmisions control are to the actual running of the engine. I thought maybe that they are sort of an after thought, or systems that are added after the engine is designed. I read threads about the problem with carbon build up and other issues that appear to be caused by the emission system. Thanks for all your responses. Robbie, how does an engine without an EGR system control cylinder temperatures?

 

[Rich]

The pedal to the right of the brake controls cylinder temperatures. Insert smiley here.