High NOX every year
- Thread starter blu3fan
- Start date
At my shop, one of the first things I would try is an induction service to clean any carbon off the pistons and valves. If you say it’s been running rich, you may have carbon deposits creating hot spots. Another thing to check is your CAT.
High nox would be running lean. Dump more fuel into it. Try a colder plug. High NOx means low CO and high CO is running rich.
There is a reason CARB puts their stamp of approval on the catalytic converters so I would almost guarantee the 49 state one is different. They have requirements in California and manufacturers don’t want to meet them. Probably because it costs too much money because they want more material in there to reduce emissions.
There is a reason CARB puts their stamp of approval on the catalytic converters so I would almost guarantee the 49 state one is different. They have requirements in California and manufacturers don’t want to meet them. Probably because it costs too much money because they want more material in there to reduce emissions.
Okay.
New plugs installed.
Timing at distributor checked. I am running little retarded 1-2 degrees like normal.
I kinda don't trust gas to have 91 octane with covid going on. and I can literally hear the stroker knocking/pinging at little at idle.
I mixed up some 110 octane~ and added a gallon to my almost full tank (normally I use this for my 80's honda motorcycle for long trips since it burns so much better/get +20mpg more). should bump up the octane a bit.
Gonna take her on a 30/1hour drive then go for smog today.
Will post results.
New plugs installed.
Timing at distributor checked. I am running little retarded 1-2 degrees like normal.
I kinda don't trust gas to have 91 octane with covid going on. and I can literally hear the stroker knocking/pinging at little at idle.
I mixed up some 110 octane~ and added a gallon to my almost full tank (normally I use this for my 80's honda motorcycle for long trips since it burns so much better/get +20mpg more). should bump up the octane a bit.
Gonna take her on a 30/1hour drive then go for smog today.
Will post results.
- Location
- Austin, Texas
Black1990jeep
NAXJA Forum User
- Location
- california
if you had the cat bolted on rather than welded, well then the cat can be removed and kept in great like new condition for a long time. a lesser cat can be installed for non test days. dont beat up your expensive cat off roading!
