Two little holes in Catalytic converter

[Joe Elliott <jee@domain.elided>]

I'm guessing that your welding may have fried something.  The oxygen 
sensor would seem to be a likely victim, but since it doesn't come 
into play in a cold start, I fear for your ECU.

At 1:39 AM -0400 4/15/02, alfa-digest wrote:
>Date: Sun, 14 Apr 2002 17:24:32 -0400
>From: Mark Denovich <mark@domain.elided>
>Subject: Two little holes in Catalytic converter
>
>Working my way down the Milano Verde to-do list, I was under the car
>this morning working on the exhaust.   I tracked down a crack where the
>two down pipes meet...   An ugly but servicable MIG weld later and the
>crack was sealed.   I decided to check for more leaks...
>
>I started the car (it fired up immediately like always), and had my wife
>put a gloved hand over the exhaust.   I quickly felt exhaust leaking
>from that damned cat/center muffler joint.   But I also felt exhaust
>escaping from two 1/8" holes in the shell of the catalytic converter.
>
>I figured the holes were due to rust (it was a very rusty Milano) and
>MIGed them shut too.
>
>The next time I started the car, it took quite a bit longer to fire.
>Normally it starts almost immediately, hardly cranks at all.   This time
>it took a good second, maybe two.  Not overly long, but definatly
>longer.  I shut it off and tried a few more times with the same results.
>
>Now my question is:  Were those two holes there by design?  Is it a
>little harder starting now that I've sealed up all the holes in the
>exhaust?
>
>I'm tempted to undo my welding of those two holes just to complete the
>experiment, but thought I'd ask the digest first, before I bother.
>
>	--Mark

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