I have a 2005 4.6 and for the past week it wont pass inspection. They tell me that its the Evap system that wont pass the test. Yet no one can tell me what this is or how to fix it. They have just been telling me to drive the truck some more and that hopefully it will run the test at some point. But 200 miles later it has not run the test. Any help is appreciated.

 

Have you tried using the Search tab? If you are not familiar with it, it is a tab up above on every page. Click on Search then cleck on Advanced Search. In the space, enter Evap System. I did and got quite a bit to read that should be helpful. This is the first one I looked at:
https://www.f150online.com/forums/ex...1450-code.html

 

Sorry Bluejay. To specify my truck is running fine and doesnt have the problems such as taking 5 cranks to start like specified in that thread.

 

The point is, there are many threads where the Evap System is discussed. You need to read thru them if you have questions about the Evap System, which is what I thought you were asking about. That is how you find clues to solve your problem.

 

I searched and found that many people were having problems and having the codes at the same time. Im not smelling gas and no idling problems at all. The truck was reset twice so far and every other code has cleared itself except for this one. Possibly a blown sensor because everything is running fine?

 

What is the exact code?

 

I have no idea about the sensor, sounds possible. Do you know if when you went in, you had a full tank of gas? If you have a full tank, I would think there would be little or no evaporation at that time, and it may get it to pass. If you are low on fuel, there is more evaporation to go to the system. Probably a dumb idea.

 

i assume he's talking about the OBD2 monitor status for the EVAP system. In which case you need to be between 1/4 and 3/4 on most cars to get it to run the test.

 

Could be as simple as a gas cap also?
How are you reseting the truck?
Note: If reseting by disconnecting the battery a p1000 code will occur and the only way yo get rid of it is as follows»
The following procedure is designed to execute and complete the OBDII monitors and to clear the Ford P1000, I/M readiness code. To complete a specific monitor for repair verification, follow steps 1 through 4 then continue with the step described by the appropriate monitor found under the "OBDII Monitor Exercised" column. When the ambient air temperature outside is 4.4° to 37.8°C (40° to 100° F), or the altitude is above 2,438 meters (8000 feet), the EVAP monitor will not run. If the P1000 code must be cleared in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be "bypassed" and the P1000 cleared. The EVAP "bypassing" procedure is described in the drive cycle. The OBDII Drive Cycle will be performed using a scan tool. Consult the instruction manual for each described function. NOTE: A detailed description of a Powertrain Control Module (PCM) Reset is found in this section; refer to the table of contents.

Drive Cycle Recommendations:
• Most OBDII monitors will complete more readily using a "steady foot" driving style during cruise or acceleration modes. Operating the throttle in a "smooth" fashion will minimize the time required for monitor completion.
• Fuel tank level should be between 1/2 and 3/4 fill with 3/4 fill being the most desirable.
• The Evaporative Monitor can only operate during the first 30 minutes of engine operation. When executing the procedure for this monitor, stay in part throttle mode and drive in a smooth fashion to minimize "fuel slosh".

 

That's why I asked what the specific code is - it's a VERY good chance it's just a P1000 and you will NOT pass emissions till it clears.

 

Check the o-ring on your gas cap if its cracked or dirty it wont seal. I see it all the time at work

 

Im having a similler problem where there is no code present but the system wont complete drive cycle so system stays in closed loop.
It passed etest in Ontario Canada but Im wondering if it is harder on gas staying in a closed loop and would perfer to fix it.
did you find anythig out or are you still looking?

 

Off topic but it sure is nice to not have inspections here in oklahoma

 

dont have them here either, just one more reason I love the great state of GA!!!