Hello I my truck has the trouble code P0440 and I believe it is being caused by a vacuum leak. I discovered the vacuum lines coming off the throttle body to be cracked and one to have been competely broke in half. I bought new lines and replaced them but the line that was broken in half could not be found. It now has a screw in it to plug the hose without the screw I can not change my heating/cooling vents they simply blow straight out of the dash. I would like to know where this hose goes. The vacuum line comes off the throttle body to the driver side to a "T" and splits.
Thanks for the help so far although I can not seem to find anything in the fender. You said to feel around but there isn't much room to actually get my hand anywhere. I attached a picture I don't know if that would help or not.
Did ryanw55 ever figure out where this vacuum hose went? I've read this discussion and looked at both posted photos and haven't figured it out yet. Have the very same problem -- cut off or broken hose and absolutely no sign where it went. In the attached photo, it's the hose that goes off at the top of the photo -- looks like it goes under the ABS mount, but I can find nothing there. Thanks --RJ--
Last edited by Lokomac; 02-28-2014 at 05:40 PM.
Reason: Refernced wrong poster.
I kept feeling around and finally found it yesterday. It was very close to the bottom of the bolt on the ABS mount and I had been felling the nipple all along -- mistook it for the end of another "bolt." I didn't have a mirror and wish that I had thought to use my camera to "see" under there. I bet that hose has been off for about four years and it explains why my A/C wouldn't go to the defrost vents and why sometimes it would alternate between the defrost vents and the dash outlets on it's own accord, but usually when I gave it the gas.
Your help is VERY appreciated and the additional photos make it clear for anyone else puzzled by this problem. Now that I know, of course, your first photo in the thread makes all the sense in the world, but before I found that nipple under there, it didn't.
Thanks again. I have a '99 S-10 and I used the engine, tranny and rear end from the '96 I drove for years in my 1936 Chevy Std. Coach -- so that S-10 lives on as well and this forum will be a big help. --RJ--