Replaced my main Abs valve that was leaking with an R8 valve off a non abs 939. Costs about $20.
Trying to find air leaks and crap. I have an issue that the truck wont build past 70 or so at idle. Rev up itll build air. Let it idle it drops on the secondary side. Found a few air leaks and fixed em. Secondary still drops with ppv side closed and primary side closed. Compressor is running all the time. Purge valve is not stuck open. It is not massively dumping air with the pedal applied. I sprayed just about every air fitting on the truck.
One way primary valve is leaking over as well. It must be a good leak as itll drop 20lbs of air in 15 seconds when the truck is running. I did replace the governor with a good one. I am working on it as best i can. And will look at it tomorrow.
Installed some new battery terminals as well And changed the oil.
Sent from my SM-G935P using Tapatalk