Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN









NC Inspection


  Email This Post



linwood
New User

Jan 29, 2010, 9:37 PM

Post #1 of 16 (3093 views)
Shortcut
NC Inspection Sign In

NC Inspection
I have a 1997 chev 1/2 ton 2 wheel drive truck, 4.3 V6 engine with 182000 miles. I bought the truck about a week ago, so I know very little about it. I Tried to get through the North Carolina inspection and it failed for the following. (Catalyst not ready, 02 sensor heater not ready, and Evaporative system not ready). I do not have the codes, he only gave me the print out from the computer which does not contain the codes. The battery was disconnected before the inspection and the inspector told me to drive it for about 75 to 100 miles and have it reinspected, which I did and it still failed for the same reasons listed above. The check engine lite is not on. He did tell me that in NC it would pass the inspection with any two not ready conditions, but more than two would fail it. Please help if you can.
Thanks
Linwood


Sidom
Veteran / Moderator
Sidom profile image

Jan 29, 2010, 11:25 PM

Post #2 of 16 (3086 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

With the monitors, there is a certain order in which they run. If one of the monitors, for what ever reason doesn't run, then the downstream monitors won't run until the upstream one runs & passes.

I don't do smogs so I would have to look up the order but since the comp uses the O2s to test the cat, I'm pretty sure the O2 monitor would have to pass before the cat monitor could run.

Normally O2s would turn on the SES light but not always. 1st thing to do would be to get the codes pulled to see what systems are having problems. Fix those problems and see if that will get your monitors to run.........






__________________________________________________________________________________________



linwood
New User

Jan 30, 2010, 12:04 AM

Post #3 of 16 (3083 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

Thanks a lot, I will surely try that.

Linwood


66chevelle903
User

Mar 18, 2010, 1:08 AM

Post #4 of 16 (3032 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

sounds like the former owners cleared the codes is why it was in non ready mode,you can obtain a drive cycle which helps go through the cycle quicker,driving 75 miles doesnt always work,th pcm goes through as many as 3 tests b4 it checks ready mode,also make sure when u turn ur iginition switch on u see th ses light come on,if th bulb is burned out or been removed ul never know when ul have trouble,plus that will fail the inspection,ive been doing inspections 15yrs.


ratrace2
User

Mar 27, 2010, 11:41 AM

Post #5 of 16 (3012 views)
Shortcut
Re: NC Inspection [In reply to] Sign In


In Reply To
sounds like the former owners cleared the codes is why it was in non ready mode,you can obtain a drive cycle which helps go through the cycle quicker,driving 75 miles doesnt always work,th pcm goes through as many as 3 tests b4 it checks ready mode,also make sure when u turn ur iginition switch on u see th ses light come on,if th bulb is burned out or been removed ul never know when ul have trouble,plus that will fail the inspection,ive been doing inspections 15yrs.

Hello,

Tell me about the drive cycle regarding the PCM and setting codes and stuff..........

for example, can we get the pcm to cycle manually?

thanks, RR2


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 27, 2010, 7:52 PM

Post #6 of 16 (3000 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

I have no idea what he's talking about there. I know of no way to hurry up the PCM to go through the drive cycles. It's just a matter of the computer having to see every scenario that it has to test and clear and until it have gone through every situation, it's not going to clear the monitors.
You can get a list of just what the scenarios are and try to drive it through every situation it needs but every car is different.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
Veteran / Moderator
Sidom profile image

Mar 27, 2010, 9:56 PM

Post #7 of 16 (2997 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

What he talking about is code trip failures...... Some codes require 2 or more successive "trip" failures before a code will set. Most of the manufacturers have a 1 trip mode you can put the PCM into to verify a repair. It for a tech so he can tell in a short time if the repair was successful or not without wasting a bunch of time and gas driving the vehicle.

As far as the drive cycles, they run as quickly as they can, some run right off the bat. The slower ones are the O2s, cat & evap monitors. Those take some time and there is no way to speed them up and if one doesn't pass or complete the "downstream" ones won't run until the 1st one runs & passes...






__________________________________________________________________________________________



ratrace2
User

Mar 28, 2010, 8:54 AM

Post #8 of 16 (2991 views)
Shortcut
Re: NC Inspection [In reply to] Sign In


In Reply To
What he talking about is code trip failures...... Some codes require 2 or more successive "trip" failures before a code will set. Most of the manufacturers have a 1 trip mode you can put the PCM into to verify a repair. It for a tech so he can tell in a short time if the repair was successful or not without wasting a bunch of time and gas driving the vehicle.

As far as the drive cycles, they run as quickly as they can, some run right off the bat. The slower ones are the O2s, cat & evap monitors. Those take some time and there is no way to speed them up and if one doesn't pass or complete the "downstream" ones won't run until the 1st one runs & passes...

That's it: "drive cycles" & "downstream".

You guys know where I could get a good book that describes the theory, design, functions of these PCM systems.

I bought an "alldata" subscription for my 1998 S10 2.2L but I-- maybe it's me--think the diagrams are kinda crapy, the search is kinda crapy, and it's just not as good as I hoped it would be. Maybe I should go back and get a trusty old Chilton manual.


Also, I would really like to get into something like this:
http://www.hptuners.com/...suite_creditsfaq.php


Sidom
Veteran / Moderator
Sidom profile image

Mar 28, 2010, 11:49 AM

Post #9 of 16 (2988 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

Good question, I will look around & see if I have some info to post.

Alldata is a good info source. I pretty much all the sections there is a "theory & description" of any area. Look around in the powertrain management sections.

When I get back from church I see if I can find some generic info for you






__________________________________________________________________________________________



ratrace2
User

Mar 28, 2010, 12:14 PM

Post #10 of 16 (2986 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

This is it:
  • "The MIL will turn off after 3 consecutive ignition cycles in which the diagnostic runs without a fault."
  • A history DTC will clear after 40 consecutive warm up cycles without a fault.
  • A scan tool can clear the DTCs.

source: "Alldata).


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 28, 2010, 9:04 PM

Post #11 of 16 (2982 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

This is also from Alldata







~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
Veteran / Moderator
Sidom profile image

Mar 28, 2010, 9:36 PM

Post #12 of 16 (2978 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

That's exactly what I was looking for...........nice






__________________________________________________________________________________________



ratrace2
User

Mar 29, 2010, 10:02 AM

Post #13 of 16 (2969 views)
Shortcut
Re: NC Inspection [In reply to] Sign In


In Reply To
That's exactly what I was looking for...........nice

I know, Hammer is one sharp cookie.........


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 29, 2010, 8:04 PM

Post #14 of 16 (2965 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

Alldata has a lot of good info. You just need to know where to find it.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



ratrace2
User

Mar 30, 2010, 7:27 PM

Post #15 of 16 (2954 views)
Shortcut
Re: NC Inspection [In reply to] Sign In


In Reply To
Alldata has a lot of good info. You just need to know where to find it.

Yea, right. I'm starting to see that Alldata has it's own system, as do chiltons.
It's like super auto information overload. . . .WOW. That's good though.
I went from nothing to WOW.....give me a month.

I'm getting there. Give me a couple of weeks with the format and I'll be OK.
But, you got'ta admit, there is a ton of stuff in there.....wow...

Thanks so much,........You guys are the best.....


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 30, 2010, 7:47 PM

Post #16 of 16 (2948 views)
Shortcut
Re: NC Inspection [In reply to] Sign In

Everything in Alldata is from the factory service manuals. They get all their info from the manufacturers. There's a lot there, You just need to learn where they keep it all.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





Advertising


  Email This Post
 
 






Latest Forum Post

2003 Chrysler mini van. 3.3 ltr 133600 mi while driving, engine light came on b...


driver side spark plugs was no problem-3 out and 3 new ones in,now it's time fo...


1998 Chevy 3500,6.5 diesel,automatic trans,4WD,1ton dump truck. Problem:Driving ...


Hi everybody not mechanical at all PLEAE HELP I HAVE A 2000 FORD TAURUS SE,,,B...


I am having a random repeating problem with a 2007 Honda Civic. The fuse that op...


Hello all. I am going to take my car into the shop to see if they can help me di...


Feed Button






Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap


Search for (options) Privacy