PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Emissions Trouble

Thread Tools
 
Search this Thread
 
Old Jun 28, 2008 | 04:12 PM
  #1  
coocooknu's Avatar
Thread Starter
On The Tree
iTrader: (3)
 
Joined: Jul 2006
Posts: 101
Likes: 0
From: Mt. Prospect, IL
Default Emissions Trouble

Well I went to take the emissions test today in my 98 Formula (Mods in Sig), and it failed b/c the OBDII tests hadn't completed yet. The tests not completed were, Catalytic Converter Eff., EVAP Control System, and EGR Flow. Now I haven't done much highway driving since getting a tune which is why I don't think it ran through the tests. My question is with the codes that aren't ready, is it b/c of the lack of highway driving, or that we might have tuned it the wrong way?

I am sure my Tuner will throw up a post, he can explain in more detail as to what he did.

I also had a Stored Diagnostic Trouble Code P0405 - EGR Sensor A Circuit Low, would they let me pass if that is there?

Thanks,
Ben
Reply
Old Jun 28, 2008 | 04:40 PM
  #2  
SilverGhost's Avatar
Motorboater
iTrader: (53)
 
Joined: Dec 2001
Posts: 7,731
Likes: 1
From: Chi-town
Default

I'm no tuner, just lended a local fbody guy a hand on this one lol.

I turned off his EGR totally, and I turned off all the codes his car was throwing including that 405 as i recall(this was a month or two ago). when we scanned it after the fact nothing was popping up anymore, current or stored so I'm not sure.

was there something i didn't do that would keep the car from running the tests properly, and why is he getting the stored 405 code?

if you guys can offer some insight I'd be glad to fix it, Ben lives right near me.
Reply
Old Jun 28, 2008 | 07:41 PM
  #3  
highgear's Avatar
TECH Enthusiast
 
Joined: Jan 2002
Posts: 531
Likes: 0
From: Helendale, Ca (SilverLakes)
Default

You cannot "turn off" any of the smog stuff for the OBD II test. The test monitors ALL the smog stuff on the car to see if it is working properly. If I remember correctly, the car has 240 seconds to get all the smog stuff running correctly. I love that test; I have been passing easily since 2003. They never look at the car; just check the computer.
Reply
Old Jun 28, 2008 | 08:41 PM
  #4  
coocooknu's Avatar
Thread Starter
On The Tree
iTrader: (3)
 
Joined: Jul 2006
Posts: 101
Likes: 0
From: Mt. Prospect, IL
Default

Thanks for the info. I need more help!! My dumbass left it for the last weekend in June so I gotta retest on MONDAY.
Reply
Old Jun 28, 2008 | 11:07 PM
  #5  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

sent pm(s)
Reply
Old Jun 29, 2008 | 12:20 AM
  #6  
SilverGhost's Avatar
Motorboater
iTrader: (53)
 
Joined: Dec 2001
Posts: 7,731
Likes: 1
From: Chi-town
Default

Frost got the PM, thanks.

Ben I sent you a PM, get back to me..
Reply
Old Jun 29, 2008 | 02:08 PM
  #7  
coocooknu's Avatar
Thread Starter
On The Tree
iTrader: (3)
 
Joined: Jul 2006
Posts: 101
Likes: 0
From: Mt. Prospect, IL
Default

PMs returned, anyone else have a thought?
Reply
Old Jun 30, 2008 | 10:23 AM
  #8  
radkon's Avatar
TECH Resident
iTrader: (2)
 
Joined: Sep 2004
Posts: 810
Likes: 0
From: Cleveland, Oh
Default

You must complete the OBDII driving cycle for all tests to run.

Google GM OBDII driving cycle its not too bad.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jun 30, 2008 | 02:12 PM
  #9  
89LS1RS's Avatar
Launching!
iTrader: (1)
 
Joined: Jun 2008
Posts: 210
Likes: 0
From: Chicago, illinois
Default

all emissions systems must function, so if you turned them off, it wont work
Reply




All times are GMT -5. The time now is 10:11 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE