fabspeed HFC o2 extenders don't work

[tonymac1]

i installed the o2 extenders that fabspeed sent me, started up the car, the CEL is still on. don't know why this is happenning, should i drive it for a few hundred miles then see what happens or the o2 extenders are nonsense?

[Mike Benvo]

Originally Posted by tonymac1

i installed the o2 extenders that fabspeed sent me, started up the car, the CEL is still on. don't know why this is happenning, should i drive it for a few hundred miles then see what happens or the o2 extenders are nonsense?

You need to clear the cat efficiency codes first. If the light came on and you put the extenders on afterward, the light will not clear itself no matter how long you drive or how many starts.

Once they are cleared, it will take some time to trigger the light again. If it doesnt reappear you are good to go.

The effectivness of the extenders is disputed. Fabspeed cats are 200 cel, so most of the time you can barely squeeze by with the extenders. As the cats age, you may have the error return sometime in the cars useful life.

Edit: The code MAY go off after 40-45 drive cycles if the car does not see that fault present. But with extenders, it's unlikely that in all forty occurrences it will pass the test.

[tonymac1]

Originally Posted by Mike Benvo

You need to clear the cat efficiency codes first. If the light came on and you put the extenders on afterward, the light will not clear itself no matter how long you drive or how many starts.

Once they are cleared, it will take some time to trigger the light again. If it doesnt reappear you are good to go.

The effectivness of the extenders is disputed. Fabspeed cats are 200 cel, so most of the time you can barely squeeze by with the extenders. As the cats age, you may have the error return sometime in the cars useful life.

So how to clear the car efficiency codes?

[J08M3]

Originally Posted by Mike Benvo

You need to clear the cat efficiency codes first. If the light came on and you put the extenders on afterward, the light will not clear itself no matter how long you drive or how many starts.

Yes it does. I ran Fabspeed for awhile and occasionally got a CEL. It would clear itself after a few hundred miles.

[tonymac1]

Originally Posted by J08M3

Yes it does. I ran Fabspeed for awhile and occasionally got a CEL. It would clear itself after a few hundred miles.

how to clear the code?

[J08M3]

Originally Posted by tonymac1

how to clear the code?

Not sure. Maybe it needs a certain amount of time or starts without crossing the threshold for CEL? I dealt with this about 3 or 4 times before I sold my pipes

[tonymac1]

Originally Posted by J08M3

Not sure. Maybe it needs a certain amount of time or starts without crossing the threshold for CEL? I dealt with this about 3 or 4 times before I sold my pipes

I thought if i still need a tune , then what's the point of the extenders?

[KennyPowers]

Originally Posted by tonymac1

I thought if i still need a tune , then what's the point of the extenders?

even with a tune, you still cant pass OBD-II based emissions. This is because you will not pass the readiness test for the o2 sensors

[tonymac1]

Originally Posted by KennyPowers

even with a tune, you still cant pass OBD-II based emissions. This is because you will not pass the readiness test for the o2 sensors

So if i take off the cats, put a tune on it, I will still have CEL sometimes?

[KennyPowers]

Originally Posted by tonymac1

So if i take off the cats, put a tune on it, I will still have CEL sometimes?

no, you will not have a CEL.

however, the tunes remove the CEL, but do not fix the fact that the o2 sensors will have a "not ready" reading on an OBD-II scan.

So basically, it will appear that all is well, but the car wont pass inspection.

As of yet, no tuner has been able to fix this issue. If they did, I am sure that they would dominate the marketplace.

[tonymac1]

Originally Posted by KennyPowers

no, you will not have a CEL.

however, the tunes remove the CEL, but do not fix the fact that the o2 sensors will have a "not ready" reading on an OBD-II scan.

So basically, it will appear that all is well, but the car wont pass inspection.

As of yet, no tuner has been able to fix this issue. If they did, I am sure that they would dominate the marketplace.

No inspection here as far as i know If the extenders don't work, i'm thinking about making it catless then throw a tune on it.

[Mike Benvo]

Originally Posted by KennyPowers

no, you will not have a CEL.

however, the tunes remove the CEL, but do not fix the fact that the o2 sensors will have a "not ready" reading on an OBD-II scan.

So basically, it will appear that all is well, but the car wont pass inspection.

As of yet, no tuner has been able to fix this issue. If they did, I am sure that they would dominate the marketplace.

Depending on how it's done, it can be "Not Ready" or "Pending".

[BMWJ]

^-- meaning "will not pass" readiness test

[Mike Benvo]

Originally Posted by BMWJ

^-- meaning "will not pass" readiness test

Correct. Although there are different guidelines in different states, and they depend on the year and spec of the car. Some states will allow 1 not ready, etc..