emission failure - add cat ?, lets say ... |
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emission failure - add cat ?, lets say ... |
jimkelly |
Apr 20 2009, 03:24 PM
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#1
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
you fabbed up a set of he's thru a cat and then thru a muffler.
hypothetical - if the exhaust read 700 HC & 7.00 CO - what woud it read with cat? jim Attached image(s) |
orange914 |
Apr 20 2009, 05:59 PM
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#2
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
i'd expect the high h.c.'s are high due to the high (rich) c.o. mix. lean out the mix (c.o.) as much as the h.c.'s will allow, stop at the low point before the h.c.'s go back up. h.c.'s are basically a misfire/partially burn fuel... either a lean or rich.
i've had cars fail with every component operating 100% except for a lazy cat that would not pass. a new cat does wonders. the big disclaimer here is to have everything else solid. the air cooled engines i've smogged have to be leaned down so much they sound like shit. the trick is to get the h.c. sweet spot while choking back the mix (c.o.) get that and a (good) cat (IMG:style_emoticons/default/smilie_pokal.gif) mike |
Drums66 |
Apr 21 2009, 01:39 PM
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#3
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
the air cooled engines i've smogged have to be leaned down so much they sound like shit. the trick is to get the h.c. sweet spot while choking back the mix (c.o.) get that and a (good) cat (IMG:style_emoticons/default/smilie_pokal.gif) mike [/quote] That was my experience....When I had to have smogging! retarded and leaned to shit!!...I always asked them to set it back like it was. when they passed it! relieved I don't have to do it anymore(75') (IMG:style_emoticons/default/agree.gif) |
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