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Engine Specific Info and Questions => IDI Engine => Topic started by: juleshs on May 25, 2009, 12:48:37 pm

Title: catalytic converter
Post by: juleshs on May 25, 2009, 12:48:37 pm

my exhaust is blowing near the cat i get rid of the cat and run my exhaust without one???

Title: Re: catalytic converter
Post by: diesel smoke on May 25, 2009, 06:05:23 pm

Yes, but if you have to get emissions checked, you're screwed. ;)

Title: Re: catalytic converter
Post by: arb on May 26, 2009, 08:41:09 am

That is the question... do you have required emission tests?  If not, you'll get a little better mpg w/o the cat. If you have the tests, find out what the rules are for your car. In the US, the first "green diesel's" were IDI with a cat. The emission standards of the day (1986 ?) did not require the cat. And in Michigan when they did have testing in the Detroit area, if you failed a test on an older car, you could get the mechanic to sign-off saying it was too costly to repair, and you had your pass on the test anyway.