HOLLAATYABOYY1 Posted April 5, 2018 Share Posted April 5, 2018 1976 datsun 280z. Not in Cali needs to pass an idle test. Did this year 280 come with a cat? They wrote on my fail sheet no cat and no muffelor . But I was under the assumption I didn’t need a cat (will install muffelor ) Looks like I failed O2 by a little bit. drove the car 20-30 mins to inspection station. Filled with 93 octane. I know I have a bad air regulator( can change but am told that’s only for cold start). new spark plugs / old oil , old wires, old filters. I just need to get this thing to pass and then I will be doing a motor swap so I don’t want to sink in a lot of money. Can anyone help me out Quote Link to comment Share on other sites More sharing options...
seattlejester Posted April 5, 2018 Share Posted April 5, 2018 I believe so, they call the hump on the drivers side the cat hump because of that if I remember correctly. The CO% is carbon monoxide and a catalytic converter's job is to convert that into CO2, so without one you would have to do some funny business to pass. Edit: I am wrong and I am one of the "confused guys" NewZed mentions, lol. Look below for good answers. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 5, 2018 Author Share Posted April 5, 2018 Oh I was under the assumption that they didn’t come with onenunless it was in CALI Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted April 5, 2018 Share Posted April 5, 2018 My Federal 1978 280Z did not come with a catalytic converter. Judging by the limits you posted, it looks like your state uses the Federal emissions standard, and that should be able to pass without a converter. It looks like your test station has incorrect information - yes the California 280Zs came with converters, I think they were added along with fuel injection to meet higher CA standards. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 5, 2018 Author Share Posted April 5, 2018 5 minutes ago, SleeperZ said: My Federal 1978 280Z did not come with a catalytic converter. Judging by the limits you posted, it looks like your state uses the Federal emissions standard, and that should be able to pass without a converter. It looks like your test station has incorrect information - yes the California 280Zs came with converters, I think they were added along with fuel injection to meet higher CA standards. Delaware is horrible no one knows anything. I’m going to have to argue that one out wih them. Do you have any way you can help me pass the co2 test without dropping a bunch of money into it ? Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 5, 2018 Share Posted April 5, 2018 1 hour ago, HOLLAATYABOYY1 said: 1976 datsun 280z. Not in Cali needs to pass an idle test. Did this year 280 come with a cat? They wrote on my fail sheet no cat and no muffelor . But I was under the assumption I didn’t need a cat (will install muffelor ) There should be a big silver sticker on the driver's side door jamb that says either Catalyst or No Catalyst. Sometimes the guys get confused when they see the spot for it underneath or they just assume that all cars have converters. The sticker is what matters though, make sure to point out that it says NO catalyst. Unless the car started in CA then you need to put it back on. Federal law, no tampering. If I recall correctly, high CO is due to incomplete combustion. Your hydrocarbon levels are under though so you're not far off. You can probably get there by opening up the idle air bypass screw on the side of the AFM, under the rubber plug. Turning it outward lets more air past the AFM vane, leaning out the idle mixture. Also, set your timing to spec. If it's too far advanced you can get misses, that will cause problems. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 5, 2018 Author Share Posted April 5, 2018 Thanks Quote Link to comment Share on other sites More sharing options...
Neverdone Posted April 5, 2018 Share Posted April 5, 2018 This is the sticker he's talking about. It's on the underside of the hood. If your car doesn't have one, you can literally by one from MSA for 25 dollars. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 5, 2018 Author Share Posted April 5, 2018 (edited) 32 minutes ago, Neverdone said: This is the sticker he's talking about. It's on the underside of the hood. If your car doesn't have one, you can literally by one from MSA for 25 dollars. There’s one problem fixed I know it’s off topic. But do you guys have any info on troubleshoitingvthe parking loghts(side markers ) Edited April 5, 2018 by HOLLAATYABOYY1 Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 5, 2018 Author Share Posted April 5, 2018 1 hour ago, NewZed said: There should be a big silver sticker on the driver's side door jamb that says either Catalyst or No Catalyst. Sometimes the guys get confused when they see the spot for it underneath or they just assume that all cars have converters. The sticker is what matters though, make sure to point out that it says NO catalyst. Unless the car started in CA then you need to put it back on. Federal law, no tampering. If I recall correctly, high CO is due to incomplete combustion. Your hydrocarbon levels are under though so you're not far off. You can probably get there by opening up the idle air bypass screw on the side of the AFM, under the rubber plug. Turning it outward lets more air past the AFM vane, leaning out the idle mixture. Also, set your timing to spec. If it's too far advanced you can get misses, that will cause problems. Any idea how much to adjust it outward ? Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 6, 2018 Share Posted April 6, 2018 3 hours ago, HOLLAATYABOYY1 said: Any idea how much to adjust it outward ? If I don't pass I adjust it outward until I hear the engine stumble a bit then run it back in a turn. You're supposed to use a gas analyzer. In Oregon we get unlimited tries, so, one or two passes and you're done. Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 6, 2018 Share Posted April 6, 2018 4 hours ago, Neverdone said: This is the sticker he's talking about. It's on the underside of the hood. If your car doesn't have one, you can literally by one from MSA for 25 dollars. There are two of them. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted April 6, 2018 Author Share Posted April 6, 2018 6 hours ago, NewZed said: If I don't pass I adjust it outward until I hear the engine stumble a bit then run it back in a turn. You're supposed to use a gas analyzer. In Oregon we get unlimited tries, so, one or two passes and you're done. Do you do that before you leave your house going to get inspected or once you are there and fail Quote Link to comment Share on other sites More sharing options...
cgsheen Posted April 6, 2018 Share Posted April 6, 2018 On 4/5/2018 at 1:46 PM, HOLLAATYABOYY1 said: I know I have a bad air regulator( can change but am told that’s only for cold start). If your air regulator is bad, the vane never closes and you'll always get bypass air into the manifold. A couple of minutes after start the vane would normally be closed and there would be no bypass air (if it was working properly). IDK if that will help your emissions but I'd block off one of the hoses if I wasn't inclined to make it work the way it should... Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 7, 2018 Share Posted April 7, 2018 cg, I think that you're mixing the throttle blade bypass (the AAR) with the AFM vane bypass (the screw in the AFM). The first just raises the idle speed, the second doesn't change idle speed directly but it does change the air'fuel ratio, by letting air past the AFM vane. I didn't answer the last question because it's kind of like asking if you should part your hair on the right or on the left. Doesn't matter where, you still have to get through the test. Quote Link to comment Share on other sites More sharing options...
socorob Posted April 9, 2018 Share Posted April 9, 2018 What about throwing some high flow cats on there? Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted May 8, 2018 Author Share Posted May 8, 2018 On 4/5/2018 at 11:16 PM, NewZed said: If I don't pass I adjust it outward until I hear the engine stumble a bit then run it back in a turn. You're supposed to use a gas analyzer. In Oregon we get unlimited tries, so, one or two passes and you're done. Hows it going guys can you tel me what screw I’m supposed to be adjusting ? Quote Link to comment Share on other sites More sharing options...
NewZed Posted May 8, 2018 Share Posted May 8, 2018 It's behind the rubber cork. Quote Link to comment Share on other sites More sharing options...
HOLLAATYABOYY1 Posted May 9, 2018 Author Share Posted May 9, 2018 Amazing thank you Quote Link to comment Share on other sites More sharing options...
blu240z Posted May 10, 2018 Share Posted May 10, 2018 Throw a cat on it that will clean up your co & hc's been smog going in Cali 20+ years Quote Link to comment Share on other sites More sharing options...
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