Emissions Test Failure - High CO
Thread Starter
3rd Gear
Joined: Dec 2003
Posts: 3
Likes: 0
From: Houston TX
Emissions Test Failure - High CO
I have a mostly stock 86 that runs great with no error messages.
Here in Houston we have very tough polution emissions tests on every car. My Vette failed twice due to slightly high CO emissions. Anyone know how to reduce the CO by tuning or other means? The NOX and HC's are well within limits.
The car has a new set of platinum plugs, fresh Mobil 1, new PCV valve, and only has 38,000 miles on a mint body and engine that is almost stock. I do have a K&N filter (freshly cleaned) and a Hypertech chip installed. Will replacing the chip with the OEM ECM help? How about changing the timing slightly?
I've also added some injector cleanout stuff to the gas and burned that thru with no positive results.
Jack
Here in Houston we have very tough polution emissions tests on every car. My Vette failed twice due to slightly high CO emissions. Anyone know how to reduce the CO by tuning or other means? The NOX and HC's are well within limits.
The car has a new set of platinum plugs, fresh Mobil 1, new PCV valve, and only has 38,000 miles on a mint body and engine that is almost stock. I do have a K&N filter (freshly cleaned) and a Hypertech chip installed. Will replacing the chip with the OEM ECM help? How about changing the timing slightly?
I've also added some injector cleanout stuff to the gas and burned that thru with no positive results.
Jack
Team Owner
Joined: Jan 2003
Posts: 20,298
Likes: 240
From: Summerland B.C. Canada
Re: Emissions Test Failure - High CO (JackHutchison)
If you have the stock chip I would put it in for the test. It adds alot of timming which could effect you emmisions. Post a link to this thread in tech/performance, there is alot more traffic there.
Good Luck and Welcome to the forum :seeya :seeya
:cheers:
Good Luck and Welcome to the forum :seeya :seeya
:cheers:
