failed emmisions
hey,new guy here i recently bought a 90 b2200 2.2 2brl a/t i took it thru emmissions and failed big time i noticed when i bought truck that the secondary air hose assy has been cut from the exhaust manifold and crimped.is that really that important to have to pass???i also notice that it idles at around 1100 or 1200 rpms.any suggestions? thanks
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RE: failed emmisions
Idle it back down to about 800rpm, that will help some. Make sure you're engine is running up to temperature. If it's running too cold, it won't burn all the emissions. Also, put in new plugs and make sure the iginition is firing as hot as it should be. Adjust your carb if you need to lean it out some to make sure all the fuel is burning. If it's too rich, you'll have alot of junk left in the emissions. Don't attempt this step if you don't know what you're doing.
After that, make sure the air pump is hooked up and operating. Air pumps are really just a farce. They pump extra air into the exhaust to dilute the pollutants coming out. It doesn't actually cut down on what's coming out. Did someone punch out your converter that owned it beofer you? If that hose is crimped, I'm going to say there's a decent chance they did. Otherwise, there's no real advantage to doing what they did. If you have a punched cat, you're going to have to replace it to pass emissions. That's about all I can offer up. After that, you're going to have to go to a shop to have them check it out. You could replace the EGR and PCV valves, but you're just taking shots in the dark on those. I don't know how to troubleshoot them. |
RE: failed emmisions
I use to tweak my 4brl to get it by inspection. Do all of the above^^^^. Locate the idle jet screw on the carb. On the 4 their in the front at the bottom, not sure about a 2. Start it up, start turning the jet screw in ( clock wise). As you turn it in, at some point it's going to start idling ruff. That's good, your running lean. Lean it out as much as you can without the engine dying. As the rpms drop off, turn your idle up. Get it inspected, even though it's running like crap it will pass. Once your out of the station, turn your jet back open until it starts running smooth again and back off on your idle.
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RE: failed emmisions
ORIGINAL: stevestar99 I use to tweak my 4brl to get it by inspection. Do all of the above^^^^. Locate the idle jet screw on the carb. On the 4 their in the front at the bottom, not sure about a 2. Start it up, start turning the jet screw in ( clock wise). As you turn it in, at some point it's going to start idling ruff. That's good, your running lean. Lean it out as much as you can without the engine dying. As the rpms drop off, turn your idle up. Get it inspected, even though it's running like crap it will pass. Once your out of the station, turn your jet back open until it starts running smooth again and back off on your idle. |
RE: failed emmisions
You don't have to cheat. Change the
catalytic converter(s) and the o2 sensor. It will not only pass like a new truck but also keep the air we breath clean. Nick |
RE: failed emmisions
Yes, do a full tune up if you havn't done so already.
ORIGINAL: blasphemous Idle it back down to about 800rpm, that will help some. ORIGINAL: blasphemous Adjust your carb if you need to lean it out some to make sure all the fuel is burning. If it's too rich, you'll have alot of junk left in the emissions. ORIGINAL: blasphemous After that, make sure the air pump is hooked up and operating. ORIGINAL: blasphemous Air pumps are really just a farce. They pump extra air into the exhaust to dilute the pollutants coming out. It doesn't actually cut down on what's coming out. ORIGINAL: blasphemous Did someone punch out your converter that owned it beofer you? If that hose is crimped, I'm going to say there's a decent chance they did. Otherwise, there's no real advantage to doing what they did. ORIGINAL: blasphemous If you have a punched cat, you're going to have to replace it to pass emissions. |
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