 OT: My tow rig failed emissions! |
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| Eddie914 |
 Aug 9 2005, 02:30 PM
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My tow rig failed emissions today in Seattle!
1983 Chevy 454 with a Quadra jet pushing a 27 ft motorhome chassis. It failed the Carbon Monoxide at idle test. HYDROCARBON (ppm) Cruise Limit: 220 Cruise Emissions: 33 Idle Limit: 220 Idle Emissions: 128 CARBON MONOXIDE (%) Cruise Limit: 1.2% Cruise Emissions: 0.75% Idle Limit: 1.2% Idle Emissions: 4.78% Unfortunately the idle mixture screws are sealed on this carburetor (for the time being). The air pump has been removed. What is interesting is that since I replaced the heads to rectify the badly worn valve seats the HC has gone substantially down and the CO has gone substantially down. Are the HC and CO inversely proportional? Should I lean it out? Should I richen it up? … or should I just shoot it? Thanks Eddie |
 
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Posts in this topic
Eddie914 OT: My tow rig failed emissions! Aug 9 2005, 02:30 PM
Brew Carbon monoxide is the incomplete burn of carbon m... Aug 9 2005, 04:43 PM chilli Make sure aircleaner element is clean or brand new... Aug 9 2005, 05:06 PM ! So why is the air pump removed? The pump dilutes ... Aug 9 2005, 05:08 PM Cap'n Krusty Aug 9 2005, 05:21 PM MecGen http://www.914world.com/bbs2/h... Aug 9 2005, 05:36 PM Tom Perso Put the air pump back on... Aug 9 2005, 05:51 PM lapuwali Strictly as a function of AFR, HC and CO both fall... Aug 9 2005, 05:54 PM bondo How's your thermostat? A motorhome will have a... Aug 9 2005, 07:18 PM Eddie914 ERROR!
Since the head replacement, the CO wen... Aug 10 2005, 12:37 AM
messix get a carb rebuild kit and replace the float. q-je... Aug 10 2005, 12:49 PM  |
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