99lbxj
NAXJA Forum User
- Location
- Long beach
What can I do to fix this Thanks
-
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Didn't pass star smog
- Thread starter 99lbxj
- Start date
Transpoquick
NAXJA Forum User
- Location
- illinois
There testing it on a set of rollers?, running?.
I remember when they use to do that around here, now they just check the ecu.
Anyway, is that first sentence true?
I remember when they use to do that around here, now they just check the ecu.
Anyway, is that first sentence true?
99lbxj
NAXJA Forum User
- Location
- Long beach
It was tested on the machine that makes you wheels spin. Don't know what it's called don't know much about smoging
What do you mean the first sentence?
What do you mean the first sentence?
Last edited:
Transpoquick
NAXJA Forum User
- Location
- illinois
Alright, first question.
Does it have the stock size tires on it?
Does it have the stock size tires on it?
99lbxj
NAXJA Forum User
- Location
- Long beach
I'm running 235/75/r15
Transpoquick
NAXJA Forum User
- Location
- illinois
Yeah, that's not the problem.
I've had issues w/ smog testing of past "vehicles" that have oversize tire's, I.E. 32's.
How many miles are on it?. Does it have a check engine light on?.
I've had issues w/ smog testing of past "vehicles" that have oversize tire's, I.E. 32's.
How many miles are on it?. Does it have a check engine light on?.
99lbxj
NAXJA Forum User
- Location
- Long beach
145xxx miles
No lights on dash at all.
No lights on dash at all.
Transpoquick
NAXJA Forum User
- Location
- illinois
If its a '99 xj were talking about and there's no check engine light on, idk why it won't pass a emissions test.
I'm glad they just check code's around here.
Someone on here can probably interpret those result's for you.
I'm glad they just check code's around here.
Someone on here can probably interpret those result's for you.
99lbxj
NAXJA Forum User
- Location
- Long beach
Thanks
- Location
- WA state
Seems to be running a little rich. When was the last time you did an oil change/tune-up? When was the last time your upstream, o2 sensor was changed?
Consider running some acetone in your fuel tank. approx 1 oz for every gallon. I would do this, and fill up and use at least 1/4-1/3 tank and go back.
Consider running some acetone in your fuel tank. approx 1 oz for every gallon. I would do this, and fill up and use at least 1/4-1/3 tank and go back.
Royal Nonesuch
NAXJA Forum User
- Location
- Pasadena, CA
Agreed that a full tuneup is a good idea if it hasn't had one since the last smog check:
Slightly more advanced things to try:
Those are all fairly simple things you can do yourself with basic tools. Be wary of the acetone trick; my understanding is that it can cause your NO levels to jump up in states that test for that such as yours. Does look like you're running rich, so I'd make sure all your sensors are good.
- Oil Change
- Cap/Rotor/Wires
- Spark Plugs
- Seafoam the intake thru the brake booster hose once or twice
- 1/2 - 1 can of seafoam/injector cleaner in gas tank
- Check vacuum hose from throttle body to MAP sensor on firewall
Slightly more advanced things to try:
- Remove & thoroughly clean throttle body
- Clean or replace Manifold Air Temp sensor
- Replace O2 sensor(s) if original, test if newer
Those are all fairly simple things you can do yourself with basic tools. Be wary of the acetone trick; my understanding is that it can cause your NO levels to jump up in states that test for that such as yours. Does look like you're running rich, so I'd make sure all your sensors are good.
O2 is a common reason for running rich. The other could be air leaks. However, if you haven't had any major engine work done recently, I would start with the O2 sensors. They often "get lazy" with time/miles, read "lean" which causes the PCM to dump in extra fuel, and causes your engine to run rich. If you have "extra soot" on your tail pipe then its almost certain you're running rich, especially if you do a lot of highway driving. Both times I've been running rich its either an air leak or lazy O2. Never had a code on either my 97 or 01.
- Location
- WA state
IIRC, late models have the MAP on the TB. Not like early models.
Also, as I said a little bit of Acetone goes a LONG way. Too much is bad. SOme good quality denatured alcohol will work. Or even that overpriced "Guaranteed to Pass" bottle of crap.
Also, as I said a little bit of Acetone goes a LONG way. Too much is bad. SOme good quality denatured alcohol will work. Or even that overpriced "Guaranteed to Pass" bottle of crap.
- Location
- Golden, CO
How do you guys come up with rich a/f when the Carbon Monoxide is well within limits?
