woody2929

Ok so I know all the troubleshooting and have found the culprit of my 4 wheel drive not working and grinding and whatnot, I however have found a check valve that I cannot seem to find anywhere not even at my local Ford dealership! My particular truck which is a 2005 Ford f150 fx4 with the 5.4 triton and on the brake booster there is a "T" where one side I believe goes down to the intake manifold and the other goes across the intake manifold and eventually is in line with the IWE hoses all connected by check valves etc. This particular check valve is on the brake booster side. I have check this valve manually and its allowing air through both ways and I would assume that it shouldn't be as the other ones in line do not allow it.

Has anybody had to replace this and if so what check valve did you use to replace it with as I cannot find it anywhere.

I have attached a pic and this particular hose is attach to the end of the hose that is right in front of the green plug in the picture

techrep

iTrader: (1)

i believe rockauto has all you need

EBC-150

On my '05 I used this to replace that check valve. It is an AC Delco, but is the same size (larger) than the other valves in the vac. system. It worked perfectly the entire time I had the truck...

woody2929

EBC-150 Thats the one I was looking at as well! I will give it a go as I am completely replacing all the hoses, check valves and vacuum hubs on my '05, Thanks techrep as I will check them out as well!.

Thanks guys.