2006Tahoe2WD
Full Access Member
Got a new GM vent valve from the dealer and installed.
I did another purge/seal test and got the same results.
I had an idea. What if the Foxwell was sending some amount of "open" signal to the purge valve even when commanded to seal. Here is what I did.
After some amount of the purge/seal test (vent valve not venting) I hit seal and then went to the purge valve and unplugged it. Guess what holds vacuum like crazy.
The only thing I can guess is the Foxwell is sending some amount of open command to the purge valve. I'll send them an email and ask.
Right now all the drive cycles are "OK" except the evap. I drove around for about an hour.
The evap may have a ways to go or is somehow still unhappy.
I did another purge/seal test and got the same results.
I had an idea. What if the Foxwell was sending some amount of "open" signal to the purge valve even when commanded to seal. Here is what I did.
After some amount of the purge/seal test (vent valve not venting) I hit seal and then went to the purge valve and unplugged it. Guess what holds vacuum like crazy.
The only thing I can guess is the Foxwell is sending some amount of open command to the purge valve. I'll send them an email and ask.
Right now all the drive cycles are "OK" except the evap. I drove around for about an hour.
The evap may have a ways to go or is somehow still unhappy.