Well i removed the rear catalytic converter on my 99 3.4l taco and before i run it i just want to double check that this won't hurt my truck in any way. I am from Canada, so emmisions isn't an issue.

It's going to throw a check light. No reason to remove it, you aren't going to gain anything from it.

I am from Canada, so emmisions isn't an issue.

Emissions are an issue you dumbass.

P.S. Learn to spell.

Emissions are an issue everywhere.

no need to be harsh, i realize what you guys are saying, but its only temp until my high flow cat comes in. Also, i have no check engine lights. But i just want to know if in the mean time it will cause any harm to my truck?

yes

what do you mean yes?

i think this website will be more helpful with your newbish ways www.yotatech.com :flipoff2:

man its a simple question and would take you guys less time to answer it than to write your witty/rude remarks.

man its a simple question and would take you guys less time to answer it than to write your witty/rude remarks.

This is the Pirate way...

Don't like it?


...The Fawk Awn son...

man its a simple question and would take you guys less time to answer it than to write your witty/rude remarks.


it is the pirate way for the guys to be a bunch of pricks and tell you a bunch of witty/rude remarks than to tell you the answer you are looking for, so if you will as this question on a tuesday then you will get alot more reasonable answers.

why a tuesday?

:shaking: you wouldnt understand

haha ok, but can anyone answer my original question please?:mr-t:

i know a guy who died after taking his cat out.



well actually he didnt die taking it out, he died driving his truck to the auto parts store to get his high flow cat

really? jk but seriously?

really? jk but seriously?
I think you missed the part where they said your check engine light will come on. You have to complete a "full cycle of driving" for it to come on though which can take up to an hour. I dont know if they build canadian stuff different but on 97+ obd2 vehicles in california you will get a check engine code which will not go off untill you reset the code with the problem fixed.

As far as problems go You could possibly suck up cold air into the head and bend a valve or something, but more or less you are just going to be loud and piss everyone off. :shaking:

thanks for a real answer Deltaclothingco. I didn't miss that part, and i already said that my check engine light didn't come on, and i have driven it for well over an hour. How would i suck in cold air?

no need to be harsh, i realize what you guys are saying, but its only temp until my high flow cat comes in. Also, i have no check engine lights. But i just want to know if in the mean time it will cause any harm to my truck?

Its good to see you've fallen victim to marketing. Might as well refill you blinker fluid and grease your muffler bearings while you're at it. :flipoff2:


FYI-

ALL cats these days are "high flow" design. Even the factory ones. Throwing a way a good high quality factory cat for a cheap aftermarket one would be stupid.

One of the few good things about California emissions laws is that companies are not allowed to market their cats as "high flow" any more for just that reason.

The term "high flow cat" dates back tot he 70's when OEM's used pellet style cats. All current cats are honeycomb style, aka "high flow."

http://www.car-stuff.com/catalyticconverter.htm
http://www.catalyticconverter.org/news/news_page.cfm?Key=catalytic_converter-&News=89

but, i didn't mention that my old one was rusted to shit and needed replacing.


SOOOOOOOo, in the mean time, will running catless hurt the vehicle?

As long as the rest of the exhaust is in tact, it won't hurt anything.

If the exhaust is just cut off, as was mentioned you could possibly have a valve problem from cold air more easily getting to the hot engine when you turn it off.

ya its not just cut off, i cut out the cat then welded in a pipe for the mean time.

some people were telling me that removing the cat would lean out the engine and cause major issues. I don't think this is true, but does anyone know if that would happen?

It shouldnt, the only thing it could hurt is if the backpressure is to low in the motor. I had mine straight piped while i waited for my new muffler, i left the cat on but taking off the cat is the same type of thing. Is that the serious answer you are looking for???? :flipoff2: And even tho your questions are stupid and newbish i respect your persistance :laughing:

haha thanks. that would be the sort of answer i was looking for.

but arn't we all a little noobish at some point? :flipoff2:

noyoull learn that on here everyone was born knowing everything

if you still have the rest of the exhaust intact, you'll see no problems. As long as you have a muffler you still have plenty of backpressure and shouldn't hurt anything.Worst case it will run lean and trigger the CEL. If the cat was damage or the combs where broken, it will be no different that before.

A less restrictive exhaust system only kills your bottom end torque. Are we rockcrawling or drag racing. You can't beat the factory system.

A less restrictive exhaust system only kills your bottom end torque. Are we rockcrawling or drag racing. You can't beat the factory system.

HAHA So you are saying every rock crawler runs the stock exhaust :laughing:. If you are really rock crawling you should have enough gearing for it not to matter :flipoff2:. And I don't think most stock systems would even fit with most of the mods that rockcrawlers have :shaking:

funny..because putting an x pipe on my cobra with no cats, made all the difference in the world, less restriction and plenty of power.

Then i bought a lovely little tool to handle the air fuel ratio, and now it doesn't run rich at all.

i pulled my cat off due to driveshaft clearance issues. replaced with 2.5 inch and a dynomax muffler. sounds crappy when off the throttle but works without 2nd 02 sensor.

HAHA So you are saying every rock crawler runs the stock exhaust :laughing:. If you are really rock crawling you should have enough gearing for it not to matter :flipoff2:. And I don't think most stock systems would even fit with most of the mods that rockcrawlers have :shaking:

How is the stock exhaust system any larger than an aftermarket? :shaking: Chop off the tail pipe section from the muffler and run it. Normally when I crawl I go well below 5 miles an hour and 3,000 RPM so I kinda like having low end torque. Dare 44 doesn't even have a real rig, so he can't really deliver any good advice on this topic. :flipoff2:

How is the stock exhaust system any larger than an aftermarket? :shaking: Chop off the tail pipe section from the muffler and run it. Normally when I crawl I go well below 5 miles an hour and 3,000 RPM so I kinda like having low end torque. Dare 44 doesn't even have a real rig, so he can't really deliver any good advice on this topic. :flipoff2:

.....Because when you're "rock crawling" you never need power or wheelspin right...And a gear reduction (or similar) box does'nt create any torque :shaking:

I know this is an old topic but if I remember right not having the cat will throw the engine into a continuos loop basically cutting the fuel mileage in half.