FYIs on passing emissions with boost....
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FYIs on passing emissions with boost....
Well, now that I have first hand knowledge it can be done, here's my tips, and some things you prolly ought to know about OBDII regardless....
Part 1: Capt. Obvious says...
You gotta have all your emissions hardware intact. So you gotta have a cat. It doesn't need to be original (mine isn't) but you can plan on them looking for one (i.e. visual inspection), and you're going to want to keep the rest of the junk there too, O2 sensors, EVAP, etc.... Since the PCV is mechanical, I would think if there's oh... say a hose nipple there instead, then its good enough.
All your breathers, etc... will probably need to be closed loops. I highly doubt you're going to get away with open valvecover breathers. You're going to need to loop that vent back into the intake, and do it before the turbo so that you're pulling vaccum all the time. You'll need to reduce the size of the hose too, you won't want to pull suction as hard as the turbo will. Just a small line will do. It may be wise to use a catch can, dump the breather into the catch can and pull vac with the other fitting. Make sure the can is baffled so you don't suck all that oil vapor through the compressor. I had my intake pipe made with a slashcut port so than the loop could be closed, but except for inspection day, I drive around with the hose disconnected and a cap on the port.... just cuz I don't want oil in the intake plumbing.
Try and make the car look like its had some time put into it... if it looks thrown together, it'll scream closer look. Remember that a lot of these guys won't know what should be there, but they're going to know if what is there doesn't look like it should be, or its in shoddy shape. Get all your vac lines and stuff tucked into place, make it neat, etc.... the more convincing it looks, the better.
Part II: The not so obvious
Since the car is OBDII they don't do the tailpipe sniff... you get the computer scan, which they feel is a more accurate view of the car's emissions because the computer has memory. If you've ever plugged in a scanner, you already know how much the computer can output as far as operational data goes.
As far as the inspection goes, there's 2 things it outputs that are of importance.
The computer is running a Pass/Fail test on your emissions as it goes, which is basically reading your O2 sensors and determining whats coming out. With a good scanner you can read this by simply plugging into the OBD port at any time.
The second one, the one thats a bit more sneaky are the Readiness Monitors.
Since most people are running e-manage, which sucks, I wouldn't be surprised if a lot of people are throwing dumb CELs like idle misfires or the "System Too Rich" code. Now, obviously, you can't pass with a CEL, BUT you also can't pass unless the readiness monitors are "READY".
So here's the dilly. The readiness monitors (RMs, just so I don't have to keey typing it) reset to "NOT READY" when you clear the CELs. This is OBDIIs failsafe so you don't clear all your CELs right before you get the car inspected and pass. To reset the RMs to "ready" you need to drive cycle the car. The drive cycle, which is kinda odd, is supposed to simulate a cross-section of driving. I do not know exactly what the cycle is, but if you google around or check out obdii.com you can see some examples. I was able to reset the monitors by:
-idling for a few minutes with the AC and rear defroster on
-driving 40 MPH for 5+ minutes without stopping
-driving 65 MPH for 5+ minutes, decelerating w/ closed throttle to 40, re-accelerating and repeating.
-sitting in stop and go traffic for a while
It takes about 50 miles to cycle it out and get the monitors back online. You are only allowed to have 2 of the RMs in a "not ready" state and still pass. I believe there are 7 monitors... Misfire, Cat. Converter, O2, O2 Heater, Evap, AC compressor, Fuel Pump.
Again, any decient scanner will be able to read the RMs and tell you ahead of time whether or not the monitors are reset. Once you got the RMs back online and the CELs off, take the car in. If your car is dodgy, cycle the computer, take it straight over to the inspection station and don't shut it off.
That being said, so long as your scanner says you'll pass, you'll pass the emissions part. The rest of the car being in good working order.... I'll leave it to you....
Part 1: Capt. Obvious says...
You gotta have all your emissions hardware intact. So you gotta have a cat. It doesn't need to be original (mine isn't) but you can plan on them looking for one (i.e. visual inspection), and you're going to want to keep the rest of the junk there too, O2 sensors, EVAP, etc.... Since the PCV is mechanical, I would think if there's oh... say a hose nipple there instead, then its good enough.
All your breathers, etc... will probably need to be closed loops. I highly doubt you're going to get away with open valvecover breathers. You're going to need to loop that vent back into the intake, and do it before the turbo so that you're pulling vaccum all the time. You'll need to reduce the size of the hose too, you won't want to pull suction as hard as the turbo will. Just a small line will do. It may be wise to use a catch can, dump the breather into the catch can and pull vac with the other fitting. Make sure the can is baffled so you don't suck all that oil vapor through the compressor. I had my intake pipe made with a slashcut port so than the loop could be closed, but except for inspection day, I drive around with the hose disconnected and a cap on the port.... just cuz I don't want oil in the intake plumbing.
Try and make the car look like its had some time put into it... if it looks thrown together, it'll scream closer look. Remember that a lot of these guys won't know what should be there, but they're going to know if what is there doesn't look like it should be, or its in shoddy shape. Get all your vac lines and stuff tucked into place, make it neat, etc.... the more convincing it looks, the better.
Part II: The not so obvious
Since the car is OBDII they don't do the tailpipe sniff... you get the computer scan, which they feel is a more accurate view of the car's emissions because the computer has memory. If you've ever plugged in a scanner, you already know how much the computer can output as far as operational data goes.
As far as the inspection goes, there's 2 things it outputs that are of importance.
The computer is running a Pass/Fail test on your emissions as it goes, which is basically reading your O2 sensors and determining whats coming out. With a good scanner you can read this by simply plugging into the OBD port at any time.
The second one, the one thats a bit more sneaky are the Readiness Monitors.
Since most people are running e-manage, which sucks, I wouldn't be surprised if a lot of people are throwing dumb CELs like idle misfires or the "System Too Rich" code. Now, obviously, you can't pass with a CEL, BUT you also can't pass unless the readiness monitors are "READY".
So here's the dilly. The readiness monitors (RMs, just so I don't have to keey typing it) reset to "NOT READY" when you clear the CELs. This is OBDIIs failsafe so you don't clear all your CELs right before you get the car inspected and pass. To reset the RMs to "ready" you need to drive cycle the car. The drive cycle, which is kinda odd, is supposed to simulate a cross-section of driving. I do not know exactly what the cycle is, but if you google around or check out obdii.com you can see some examples. I was able to reset the monitors by:
-idling for a few minutes with the AC and rear defroster on
-driving 40 MPH for 5+ minutes without stopping
-driving 65 MPH for 5+ minutes, decelerating w/ closed throttle to 40, re-accelerating and repeating.
-sitting in stop and go traffic for a while
It takes about 50 miles to cycle it out and get the monitors back online. You are only allowed to have 2 of the RMs in a "not ready" state and still pass. I believe there are 7 monitors... Misfire, Cat. Converter, O2, O2 Heater, Evap, AC compressor, Fuel Pump.
Again, any decient scanner will be able to read the RMs and tell you ahead of time whether or not the monitors are reset. Once you got the RMs back online and the CELs off, take the car in. If your car is dodgy, cycle the computer, take it straight over to the inspection station and don't shut it off.
That being said, so long as your scanner says you'll pass, you'll pass the emissions part. The rest of the car being in good working order.... I'll leave it to you....
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