Computer Question

[axlehead]

CAT, EVAP, and EGR.

[Power Hungry]

I've checked the tune and there is nothing in it that affects CAT, EVAP, or EGR, so if the system monitors are not clearing then there is actually a problem with the systems or you simply have not completed a proper drive cycle to reset all the monitors.

Please be sure to read this FAQ on the proper conditions for system monitor reset. It may help.

Power Hungry Performance Forum - FAQ: Ford F150 FAQs

You probably won't have access to the necessary scan-tool, but just do the best you can. The critical conditions are fuel level and engine temp. They must be followed pretty strictly or you're going to end up fighting the monitors.

Let me know if there's anything further we can help with.

[axlehead]

I flashed it back to stock and somehow all but evap has cleared. Will flashing back to the custom tune reset these again? I'm allowed one not ready monitor but the p1000 will fail me. I know the custom tune removes the p1000. So if I flash it to remove the p1000 will the one not ready monitor remain the only not ready?

[Power Hungry]

Well, I could give you a "stock" with the P1000 removed and that should get you through emissions. However, I don't understand what could possibly be in the custom tuning that could have caused the problem you had resetting the monitors.

The P1000 should clear itself out shortly. Just DO NOT do a "Clear DTCs" as this will actually reset the P1000 again.

Let me know if we need to put a file together for you.

Take care.

[axlehead]

So will flashing the custom tune reset them all to not ready then?

[Power Hungry]

Unfortunately, yes. So it's almost better to just go with what you've got and drive until the P1000 goes out. You can READ the DTC's without causing a problem, just don't CLEAR the DTCs.