SLC97SR5
IDIesel
- Location
- Davis County
Timing is good?
Help with failed emissions
- Thread starter crawler dude12
- Start date
crawler dude12
Active Member
- Location
- Orem
Runs smooth, but I have never checked it
crawler dude12
Active Member
- Location
- Orem
Checked timing, replaces the o2 sensor, got pulled over, and it failed again... It's REALLY close though. 
audiofreak97
Registered User
- Location
- Magna
Have you checked the cat at all in all of your attempts?
When my 280zx wouldn't pass I messed with tune ups, timing, idle adjustments, alcohol, fuel injector cleaning, even swapped manifolds and egr stuff and no matter what i did it would get close, but not pass. Finally decided to pull out the cat and there was a hole all the way though the cat. Replaced it with a Magnaflow universal cat off of Summit and it passed with really low numbers.
When my 280zx wouldn't pass I messed with tune ups, timing, idle adjustments, alcohol, fuel injector cleaning, even swapped manifolds and egr stuff and no matter what i did it would get close, but not pass. Finally decided to pull out the cat and there was a hole all the way though the cat. Replaced it with a Magnaflow universal cat off of Summit and it passed with really low numbers.
n1v3kt
Member
- Location
- Provo, Utah
...register it in St. George 
I had an 89 22re. The issues that cost me my emissions before (eliminating tune, oil, plugs, filter etc.) was that the cat did go bad on me at one point and also a crack in the y-joint.
I had an 89 22re. The issues that cost me my emissions before (eliminating tune, oil, plugs, filter etc.) was that the cat did go bad on me at one point and also a crack in the y-joint.
TurboMinivan
Still plays with cars
- Location
- Lehi, UT
It looks like you're still running rich, or else your cat isn't cleaning up enough of the exhaust. Have you verified your MAP/MAF sensor (whichever you have) is functioning correctly? Is the engine up to proper operating temp? And have you tested the cat for proper operation? These look like your most probable culprits at this point....
crawler dude12
Active Member
- Location
- Orem
I haven't checked the cat, or the map/maf sensor, I tried my best to get the engine warmed up the best I could, but I got pulled over for expired temp tags and just went and tested it... I am away for the weekend and in going to try some guaranteed to pass stuff.
TurboMinivan
Still plays with cars
- Location
- Lehi, UT
When I suggested this, my main concern was that your engine might still be operating in cold loop mode--such as if the thermostat is stuck open. If the temp gauge is normal and you get good heat out of the system, I'd say this is probably not your problem.
I have seen marginal cats that squeaked out a passing score after you drove the vehicle a lot at freeway speeds to really heat up the cat, though.
crawler dude12
Active Member
- Location
- Orem
Anyone recommend a good reliable place to go get it tested? And can I have a safety inspection and a emission test from different places and still get it registered?
Emmissions Now
It's off state street in Murray. Don is bad ass. He is a guy that you will want to be buddies with.
crawler dude12
Active Member
- Location
- Orem
Ok cool. I will take it to him when I get the chance
crawler dude12
Active Member
- Location
- Orem
I had my dad take it into his work and had some people look at it, and the CAT is bad like you said... So I'm going to go get it replaced today. Thanks for all of your help!!
TurboMinivan
Still plays with cars
- Location
- Lehi, UT
If local cats break the bank, call Don's Hot Rod Shop in AZ 800-888-8892. They have universal replacement cats for $60-$90 (last time I needed one, anyway).
crawler dude12
Active Member
- Location
- Orem
It's alright I'm good friends with a neighbor who owns a muffler shop and he said he would give me a good deal for a new cat and Install