Emission testing..

[AZFX4]

I did stock programming and disconnecting of battery just lastnight because after 500+ miles it still didn't go away, I had to try something. I know this throws the P1000 all over again, but maybe being on stock it will pass, something with custom tunes was blocking it from reading the sensors, if that's possible. I'm just willing to try anything since I NEED to pass.

[Power Hungry]

P1000 is a "DTC" which indicates that the PCM has not finished drive cycle testing of the Evaporative, EGR, O2, and other systems. When those systems clear the self tests, then the P1000 goes away by itself. Just removing the programmer from the OBDII port DOES NOT have anything to do with the P1000 or the self tests, so we can rule out that as a problem.

I checked your calibrations and there is nothing in the tuning that would affect the EVAP or the EGR test monitors. I seriously doubt that the cause of the test failure is related to the tuning, and that you may actually have a problem with the vehicle's EVAP system (often a bad gas cap or a broken vent hose from the fuel tank) and/or the EGR system. Your calibration is one of the most popular 97-03 calibrations we do tuning for and I've never seen this issue before.

What it comes down to is this...

(1) Check the EVAP system for cracks or leaks... anything that will prevent the fuel tank from drawing a slight vacuum while running. If the EVAP system can't maintain a vacuum in the fuel tank, this will definitely prevent the OBD monitors from completing and you will fail every time.

(2) Return the truck back to stock and then follow the recommended drive cycle procedure. If the vehicle is still failing, then you definitely have a problem with the systems indicated.

As to the issue of why the programmer is hanging, I don't have an immediate answer. That could be a hardware related issue, heat issue, or voltage issue, or something else not identified. For the time being, do not reprogram the vehicle unless you're at home so we can perform a recovery if necessary.

I hope this is helpful.

[Jackpine]

AZFX4 - Now that you're talking to Bill and Cody, I'll stay out of it. I like Bill's explanation. But, can you tell us - do they actually test anything on your model year truck besides plugging into the OBD port? For instance, do they take your gas cap off and attach it to a vacuum port to see if it's alright? Do they put a sniffer into the tailpipe?

As I recall, on my 2005 truck, I use the OBD port only line and the ONLY thing they do is read the data at the port. I seem to remember that line is for 2001 and up trucks (but I may have the year wrong).

Knowing this information may help Bill.

Oh, one more thing. I don't think you will be able to read the P1000 code if it's set using the monochrome Gryphon. At least I never did. I DO see it (when it's set) with the CTS programmer though and I assume the CS would show it too.

- Jack

[Power Hungry]

All the programmers (Gryphon, Evolution, CS, and CTS) have the capability to read the P1000. The question is whether or not the P1000 DTC has been disabled in the calibration. In most cases, the P1000 was shut off to avoid the annoyance of the DTC and also prevent unnecessary tech calls about what the P1000 DTC was. However, this does not affect the system self tests for the OBDII monitors. Those will continue to function as normal, so if the monitors continue to come back as "Not Ready" then there is a problem with one or more emissions related systems.

I will say that performing a drive cycle to reset the monitors can be extremely difficult. There are very specific guidelines that need to be adhered to and sometimes it can take days of driving to get the monitors to clear. With specific fuel levels, temperatures, drive speeds and drive cycles that need to be met, it can be quite a pain. I do think that after 500 miles of driving, if the system hasn't cleared itself then there really is a problem with the vehicle. Unfortunately, OBDII monitors aren't something that can be forced, faked, or bypassed.

Take care.

[Jackpine]

Originally Posted by Power Hungry

All the programmers (Gryphon, Evolution, CS, and CTS) have the capability to read the P1000. The question is whether or not the P1000 DTC has been disabled in the calibration. In most cases, the P1000 was shut off to avoid the annoyance of the DTC and also prevent unnecessary tech calls about what the P1000 DTC was. However, this does not affect the system self tests for the OBDII monitors. Those will continue to function as normal, so if the monitors continue to come back as "Not Ready" then there is a problem with one or more emissions related systems.

I will say that performing a drive cycle to reset the monitors can be extremely difficult. There are very specific guidelines that need to be adhered to and sometimes it can take days of driving to get the monitors to clear. With specific fuel levels, temperatures, drive speeds and drive cycles that need to be met, it can be quite a pain. I do think that after 500 miles of driving, if the system hasn't cleared itself then there really is a problem with the vehicle. Unfortunately, OBDII monitors aren't something that can be forced, faked, or bypassed.

Take care.

Bill, my comment about the P1000 code was based on my NEVER seeing it when returning the truck to stock while I was still using my old Gryphon. And yes, I looked for it. But, it showed up at stock when I started using the CTS. And, as you say, it certainly did not clear quickly when the truck was at stock either.

- Jack

[AZFX4]

Bill, that helps alot... I'll see what happens tomorrow as I'm taking a long drive, if that fails I will follow their guidelines on drive cycle on stock tune and see if I can possibly get rid of it.

J&J, They plug into my OBD port and they take my gas cap off, but it failed before they did anything to my gas cap. I can't recall if they put a tube over it when I first bought it or not? So I can't be sure.

[cleatus12r]

Oh, and the EPA mandate for OBD 2 vehicles and the EVAP system requires the fuel level to be between 85% and 15%...so you have a wider fuel level window than what the emission shop told you.

Just a little information.

[AZFX4]

If getting rid fo the drive cycle code is so strict, I need to try to find a road that I can actually do everything correctly. Not to many places I can do certain speeds for long periods of times like it says. Or 0-60s, back to 40s, OD off, ect ect.

[Power Hungry]

That's the problem. I've had to fight for days to on some vehicles to get the OBD test monitors to complete. Others will seem to do it just driving to the grocery store. It's really weird.