Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
arcticcat400

catalytic converters

9 posts in this topic

i have a 1997 chevy z71 and wondered if it would cause any problems to remove the cats i know its illegal but this is not for on road use i was just wondering if it would cause any mechanical problems to remove them

Share this post


Link to post
Share on other sites

Why???? Unless you're running Las Vegas this weekend, you will never notice the cat's gone. It's not worth the Federal Offense of running without the cat.

Share this post


Link to post
Share on other sites

Mechanical problems? Not really so much as performance problems.

The fuel injection system bases its need for more or less fuel on readings taken from the O2 sensors. With no cats those readings will be wrong and the result will be worse performance, worse mileage and check engine lights on all the time. Basically no positive gains and extra work for you.

Share this post


Link to post
Share on other sites

If you do remove them, and I dont recommend it, what you can do to bypass the light being on, and the fuel trim issues, is put a programmer in it, and get some dummy plug o2 sensors.

Share this post


Link to post
Share on other sites

FYI- The reason it is illegal to remove them is because of emmisions. Engines do not run on an opitimized combustion process, do to metallurgical reasons (Complete combustion would create too high of temperatures). So as a result they give the engine excess gasoline. Since there is excess gasoline that does not combust it goes out the exhaust. The catalytic converter is there to burn off all the excess hydrocarbons(gasoline) that were not combusted in the combustion process.

Share this post


Link to post
Share on other sites

UMD,

What 4wandering said, corrects the issue (to a point).

The End sick.gif!

I do not want to get caught up in catalytic whirl wind thread again grin.gif.

It is illegal to remove the cats and I do not recommend it.

Share this post


Link to post
Share on other sites

Sorry, i don't claim to know everything, or even very much sometimes. I just thought i would chime in with some info i have learned in class.

Share this post


Link to post
Share on other sites

Great post UMD- all I know about cats is when they become clogged, your exhaust gets red hot and ends up burning up your valves and such, and ruins your engine (dont ask me how I know... I miss that truck haha)

Share this post


Link to post
Share on other sites

Yes it is illegal to tamper with any federally mandated emission component. Although it is not actively enforced at this time we are still on the honor system. I am not doubting your use of the vehicle as "off road only" but we have no way of verifying this therefore making it irresponsible on our part to give any recommendation on how to do it or how to fool the PCM into thinking everything is o.k.

If your intentions are as you posted than the emissions laws may not necessarily apply to that vehicle however the vehicle may no longer be licensed to operate on any roadway in the country. The only way that it could be licensed (or sold as an on road vehicle) is if the emissions system is restored to the O.E. or O.E. equivalent according to the emissions laws at the time of manufacturer.

 Originally Posted By: doughnut03
Great post UMD- all I know about cats is when they become clogged, your exhaust gets red hot and ends up burning up your valves and such, and ruins your engine (dont ask me how I know... I miss that truck haha)

There should have been plenty of warning signs before that happened. ;\)

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • leech~~
        Oh, says the guy that just took the plunge! I'm sure it will do your little pan fish ok. Let me know if you need a few Walleye's to try?
    • ZachD
      My buddy dulled his blades against a brick first thing when he got his. still cuts awesome just not through bones 
    • eyeguy 54
      you should have taken lessons    
    • leech~~
      I had a battery op Repala a few years ago and sold it to someone else at our campground. Didn't like the way they just zipped through without following the fillets and lost a lot of meat. Really suk's on a partly frozen fish!   Mine came with a case.
    • eyeguy 54
      decided to take the plunge and bought a Rapala Ion rechargeable. anybody have one and what do you use for a case?