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Guest Message by DevFuse

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Modded turbo wagon failed emissions--any suggestions?

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2 replies to this topic

#1 WagonsOnly


    Now only WagonsMostly.

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  • North Central CT

Posted 02 March 2006 - 01:21 AM

Well, the wagon I bought from Tony failed kinda marginally on hydrocarbon emissions (2-speed idle test since it's dyno exempt) and miserably on CO.

My readings were around 300 ppm for hydrocarbons, both tests, and 6% CO during the cruise test. Idle is whatever the car idles at, 1100RPM limit; cruise is around 2500 RPM (close as the inspector can manage). The limits are 220ppm HC and 1.20% CO...I can either pay a $40 fine every 2 years and reregister the car...or get a shop to put $660 into it and qualify for a waiver...or figure out some way to get the darned thing to pass.

Any ideas?



#2 Subaru Jim Maple Ridge

Subaru Jim Maple Ridge

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Posted 02 March 2006 - 01:26 AM

Thanks for telling us what year and model you are dealing with, but if you could pose the questions more coherently, we'll do more than throw out lame quesses.

#3 WagonsOnly


    Now only WagonsMostly.

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Posted 02 March 2006 - 01:37 AM

It's an '88 GL-10 Turbo. I failed emissions and need to get the hydrocarbons and CO down below the acceptable limits, as stated above.

The two-speed idle test requires the inspector to obtain an average reading from exhaust gases over 2.5 minutes of run time--once at idle, not to exceed 1100 RPM, and once in "cruise" mode at or near 2500RPM.

My readings were:

Cruise mode:
HC result 295 parts per million
HC limit 220 ppm

CO result: 6.1%
CO limit: 1.20%

Idle mode:
RPMs: 950
RPM Limit: 1100

HC results 264 ppm
HC limit 220 ppm

CO result: .8%
CO Limit: 1.20%

As the title suggests the car has a straight 2.5" exhaust on it and a couple of other modifications that will not affect emissions performace. It's had a recent tuneup and the block was built (I was told with emissions in mind) less than 7K ago.

Also as the title suggests, it's a standard Subaru turbo wagon...this is the old gen forum, chances are it's an EA82.

Finally, what I need to do (I thought this was also pretty clear) is get through a state mandated emissions test, the cheaper the better. If I can't, oh well, I'll just pay the fine and get plates anyway.

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