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Old 05-21-2004, 12:46 AM   #1
wickedscooby
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Location: long island, ny
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99rs sti v5 LISC #57

Default turbo kit = CEL?

if i put in a turbo kit into my rs would i throw a CEL and have trouble with emmisions
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Old 05-21-2004, 01:09 AM   #2
NeaD
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I'm going to keep it short. Yes.
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Old 05-21-2004, 01:22 AM   #3
benjaminetanyahoo
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If you're worried about CELs popping up, you need to keep the turbo kit out because that is the last of your worries.
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Old 05-21-2004, 01:41 AM   #4
kastle
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Quote:
Originally posted by FutureSTIer
If you're worried about CELs popping up, you need to keep the turbo kit out because that is the last of your worries.

Ding, we have the winner!
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Old 05-21-2004, 01:50 AM   #5
benjaminetanyahoo
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Hey stop post whoring Mod

I got to regulate on a Mod... Oh Yeah!!!!

I'm joking so don't regulate on me please
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Old 05-21-2004, 06:03 PM   #6
Derk1127
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the only cels ive had so far are:
0420
0301
0302
0303
0304
and the one for the o2 sensor, not too bad id say and as of rite now theres no cel.
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Old 05-21-2004, 08:39 PM   #7
wickedscooby
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ok cool, im not worried about the CEL poping up im just worried about having it inspected in NY. but if i need too i can make a cheater pipe and put a second cat on it.
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Old 05-21-2004, 11:56 PM   #8
Unsung Boxer
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OBD2 cars can't pass emissions w/ a CEL present.

A "turbo kit" should not throw any CEL's. This is what make's it a kit. They have had all the bugs worked out of them which should make them bolt on directly, and simulate/satisfy OBD sensors.

Just throwing a turbo on your car WILL throw CEL's. MAP sensor will go out of range, injectors will go out of range, O2 sensor will read to lean, etc... There are fixes to all these things.

I am running OBD2 98 Impreza L with a Pieced together turbo setup. I worked through all the sensors, either with boost nanny, fuel managment, etc so that I have no CEL's. I passed emissions a couple months ago. This MAF based OBD2 is most likely the hardest car to turbocharge, and ive done it, so anyone can.

-Jake

Last edited by Unsung Boxer; 05-22-2004 at 01:16 PM.
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Old 05-22-2004, 06:49 PM   #9
wickedscooby
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thanx jake, you definitly helped me out
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Old 05-22-2004, 07:00 PM   #10
Matt Monson
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So, what happens if they plug into your OBD-II port and start reading the datalog?
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Old 05-22-2004, 08:41 PM   #11
Unsung Boxer
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its called Datastream, and its not what your imagining. Its not like the ECU knows that it has a Turbo hooked up to it.

The data simply shows what the inputs to the sensors are. If a MAP sensor is supposed to read 0-5v, then its gonna know that Atmospheric pressure is somewhere around 4.7v. SO... if you throw a turbo on there, its gonna excceed 4.7v and throw a CEL. Since state law says you can't pass emissions with a CEL, you now FAIL.

How do you fix this particular problem? the Boost nanny (a series of checkvalves) will keep the MAP sensor from seeing higher than Atmoshperic pressure, thus the MAP sensor doesnt go out of range, and the ECU is happy... no CEL, pass emissions.

-Jake
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Old 05-24-2004, 07:29 PM   #12
wickedscooby
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where could i get those boost nanny (check valves)
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