Emissions
Thread Starter
|
New User
Joined: Jun 2017
Posts: 24
Likes: 0
Emissions
Anyone have an idea on emissions test for 7.3l? I have a 2002 with a TS 6 Chip and also equipped with a 4” straight pipe axle dump. I heard they plug stuff up and test things, then I also read stuff on opacity test. Would they plug into the PCM? If so, I think I have a problem since my TS Chip is in the way.
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
Here in Colorado they test for opacity, I've had readings around 10% and I believe 30% is the limit. The Opacity is only attached to the tailpipe. I'd be willing to bet each State is different, Google diesel emissions in your State.
Logistics Pro
Joined: Aug 2009
Posts: 3,609
Likes: 324
From: Arizona
Here is Pima County, Arizona it's opacity plus a visual to see if anything is unplugged under the hood and they look for the non-catalyst sticker. Sometimes they waste time looking for the cat with a mirror before checking for the sticker.
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
6 position switch-yes they will. I hide mine under the dash for smog checks. Air filters and the like AHEAD of the turbo are not subject to smog requirements. At least they were not the last check I had. A modified exhaust will fail if there was/needs a CAT. 99.5 - 2003 PSD with auto trans did not have a CAT. Manual trans did. Don't know if that is the case for the F-450 and up.
Trending Topics
Lead Driver
Joined: Dec 2006
Posts: 7,093
Likes: 147
From: San Diego, CA
San Diego County is visual, OBD-II, and opacity.
My shop pops the hood, does a visual to make sure it still has stock-ish components, hooks up to my OBD-II to make sure all of my sensors are working then does the opacity test. They start up the truck and rev it up once to "clear its throat". Then they do 3 revs in succession while looking in my rearview mirror. Too much smoke and it fails. How much smoke is too much? Don't know. It's a judgment call by the technician who has been to the class.
I've passed every test since they started it. My last test (almost 2 years ago) went off without a hitch. Here are the mods I've got that might be an issue: FRx, 6 position chip, 6637, Turbomaster wastegate controller (no more red/green lines) and a 4" MBRP (with muffler). The rest are internal or not related to the engine/emissions. I've had no problems yet. A few years ago I was in a rush and tried a different place and they told me I would fail with the 6637 even though I showed him the state instruction showing it was legal. Needless to say I never went back to them.
My shop pops the hood, does a visual to make sure it still has stock-ish components, hooks up to my OBD-II to make sure all of my sensors are working then does the opacity test. They start up the truck and rev it up once to "clear its throat". Then they do 3 revs in succession while looking in my rearview mirror. Too much smoke and it fails. How much smoke is too much? Don't know. It's a judgment call by the technician who has been to the class.
I've passed every test since they started it. My last test (almost 2 years ago) went off without a hitch. Here are the mods I've got that might be an issue: FRx, 6 position chip, 6637, Turbomaster wastegate controller (no more red/green lines) and a 4" MBRP (with muffler). The rest are internal or not related to the engine/emissions. I've had no problems yet. A few years ago I was in a rush and tried a different place and they told me I would fail with the 6637 even though I showed him the state instruction showing it was legal. Needless to say I never went back to them.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Mountain Pass
Joined: Jan 2008
Posts: 104
Likes: 7
From: Snohomish, WA
6 position switch-yes they will. I hide mine under the dash for smog checks. Air filters and the like AHEAD of the turbo are not subject to smog requirements. At least they were not the last check I had. A modified exhaust will fail if there was/needs a CAT. 99.5 - 2003 PSD with auto trans did not have a CAT. Manual trans did. Don't know if that is the case for the F-450 and up.
Super Moderator
Joined: Apr 2004
Posts: 34,512
Likes: 2,824
Anyone have an idea on emissions test for 7.3l? I have a 2002 with a TS 6 Chip and also equipped with a 4” straight pipe axle dump. I heard they plug stuff up and test things, then I also read stuff on opacity test. Would they plug into the PCM? If so, I think I have a problem since my TS Chip is in the way.
Important Information - TN.Gov
For $9 he might pass or get his answers as to why not, and one way or the other will be on the way to being done with this.
Don't matter what CA does, or what MT doesn't do.
