Failing Inspection Please Help

Printable Version

Chevrolet Forums >> Chevy Trucks, Vans & SUV's >> S-10 & Blazer >> Failing Inspection Please Help

Page: [1]

Login Message << Older Topic   Newer Topic >>

Failing Inspection Please Help - 3/9/2008 6:14:03 PM    w8ddwn   Posts: 2 Joined: 3/9/2008 Status: offline 1997 Chevy S-10.   I keep failing for my OBD Emissions. The readiness Status for just about everything, Cats, Ox sensors, EGR, Evap. The guy at inspection told me its not that there is anything wrong with those systems just that the computer is not reading them. i had the comp put on a machine at my local mechanic and everything came up fine. Went back to inspection and they all came up again, this time they told me there is nothing they can do as long as it comes up they cant pass me. Please anyone have any ideas of what could be wrong. Thanks < Message edited by w8ddwn -- 3/9/2008 6:15:46 PM > Post #: 1

RE: Failing Inspection Please Help - 3/9/2008 7:45:01 PM    shawnvw   Posts: 832 Joined: 1/18/2008 Status: offline I don't know if it is the same the the u.s. but in ontario we check specific gases coming out of the tail pipe....HydroCarbons(HC), Oxides of Nitrogen(NOx), and Carbon Monoxide(CO) which gas did your vehicle fail on? (in reply to w8ddwn) Post #: 2

RE: Failing Inspection Please Help - 3/9/2008 8:57:32 PM    northey87 Posts: 855 Joined: 10/17/2007 Status: offline Is the vehicle throwing these codes, I guess what I am asking is how do the inspection mechanics know that those systems are acting up? I live in PA and the emissions testing consists of testing the exhuast, they don't care wheather or not there is something wrong (throwing codes) with your vehicle unless it doesn't pass the emiisions test.  _____________________________ ''''95 1500 Silverado, 350, flowmaster Force II exhuast, S&B CAI. Get your votes in for the August ROTM!! http://snappoll.com/poll/279825.php (in reply to shawnvw) Post #: 3

RE: Failing Inspection Please Help - 3/10/2008 12:32:28 PM    w8ddwn   Posts: 2 Joined: 3/9/2008 Status: offline in jersey the also plug the truck computer in and read all the codes it is showing. it sucks (in reply to northey87) Post #: 4

RE: Failing Inspection Please Help - 3/10/2008 1:25:13 PM    2tallcustomz   Posts: 83 Joined: 3/6/2008 Status: offline i am a state inspectore here in texas and its the same way. we have to plug into the car first and check the readiness status of all the emissions systems before we do the 5 gas test. the only reason they ever show they are not ready is because there was a code that had been cleared so it will show its not ready. but if there are no codes i dont know why it would be showing that its not ready if there were no codes that were cleared (in reply to w8ddwn) Post #: 5

RE: Failing Inspection Please Help - 3/11/2008 6:50:38 PM    shawnvw   Posts: 832 Joined: 1/18/2008 Status: offline Correct me if i'm wrong here someone, but i think to get the readiness status of these systems to show ready is to go through a specific drive cycle?....I don't remember exactly what it is or if i'm totally out to lunch but i do rememebr something about this (in reply to 2tallcustomz) Post #: 6

RE: Failing Inspection Please Help - 3/15/2008 7:29:16 AM    shawnvw   Posts: 832 Joined: 1/18/2008 Status: offline Just found this little chart that confirms my suspician.... System Status and Drive Cycle For Satisfying the Federal Inspection/Maintenance (I/M 240) Regulations The system status selection is included in the scan tool System Info menu. Several states require that the I/M 240 (OBD ll system) pass on-board tests for the major diagnostics prior to having a vehicle emission inspection. This is also a requirement to renew license plates in some areas. Using a scan tool, the technician can observe the system status, complete or not complete, in order to verify that the vehicle meets the criteria which complies with local area requirements. Using the system status display, any of the following systems or a combination of the systems may be monitored for I/M readiness:    •  The catalyst    •  The HO2S    •  The HO2S heater   Important: The system status display indicates only whether or not the test has been completed. The system status display does not necessarily mean that the test has passed. If a Failed Last Test indication is present for a DTC associated with one of the above systems, that test is failed. Diagnosis and repair is necessary in order to meet the I/M 240 requirement. Verify that the vehicle passes all of the diagnostic tests associated with the displayed system status prior to returning the vehicle to the customer. Refer to the Typical OBD II Drive Cycle table to use as a guide to complete the I/M 240 system status tests. More than one drive cycle may be needed. Following a DTC info clear, the system status will clear only for the systems affected by any DTCs stored. Following a battery disconnect or a control module replacement, all of the system status information will clear. Typical OBD II Drive Cycle Diagnostic Time Schedule for I/M Readiness Vehicle Drive Status                                                                 What is Monitored? Cold Start, coolant temperature less than 50°C (122°F)                                                        -- Idle 2.5 minutes in Drive (Auto) Neutral (Man), A/C                        HO2S Heater, Misfire, Secondary Air, Fuel Trim, EVAP Purge and rear defogger ON A/C off, accelerate to 90 km/h (55 mph), 1/2 throttle.                                               Misfire, Fuel Trim, Purge 3 minutes of Steady State - Cruise at 90 km/h (55 mph)                     Misfire, EGR, Secondary Air, Fuel Trim, HO2S, EVAP Purge Clutch engaged (Man), no braking, decelerate to 32 km/h (20 mph)                               EGR, Fuel Trim, EVAP Purge Accelerate to 90-97 km/h (55-60 mph), 3/4 throttle                                                  Misfire, Fuel Trim, EVAP Purge 5 minutes of Steady State Cruise at 90-97 km/h (55-60 mph)              Catalyst Monitor, Misfire, EGR, Fuel Trim, HO2S, EVAP Purge Decelerate, no breaking. End of Drive Cycle                                                                         EGR, EVAP Purge Total time of OBD II Drive Cycle 12 minutes < Message edited by shawnvw -- 3/15/2008 7:34:27 AM > (in reply to shawnvw) Post #: 7

RE: Failing Inspection Please Help - 3/17/2008 4:36:07 PM    blazerman   Posts: 29 Joined: 10/26/2007 Status: offline Try going to the junk yard and see if they have a good condition cat, and other parts. Put them on and try again. I had a friend who would take his cat off till inspection and then replace it again. I know he sucks but he did pass every time, it did take some work to do this once a year. (in reply to shawnvw) Post #: 8

Today's Posts
Most Active Topics
Make A Donation
Forum Rules & FAQ
RSS Feeds

Chevy Prices

Chevy Forums
Monte Carlo
Corvette
Camaro

Top 10 Posters
zx1100f1 2429 biglg 2166 73shark 2143 eurogoldls 2031 engine2 1707 tahoe07 1139 northey87 855 shawnvw 832 golfer 610 malibumaxxss 598

New Vendors
Truxedo
AMSOIL - Performance Oil Technology
K&N Engineering, Inc.