Originally Posted by adonh
That does not sound good. I just had the SMI installed. Where is this check valve, do you have a picture. Thanks
The check valve I am talking about is INSIDE the control module. It appears that a faulty check valve inside the module is in line with the vacuum hose and thus can be "replaced" by putting another check valve into the vacuum hose.
there is another check valve that is between the crank case and the "T" that connects the AFO into the vacuum system. That, apparently, is not the problem. I asked them about it. also, in trouble shooting the problem we left that check valve alone and when we bypassed the AFO control box the problem went away.
Don, Sandee & GSD Zeus. Gardian Wings earned are GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.