Location of PCV elbow - (running lean)
My truck (2001 F150 4.2) has been running lean (both banks) for a while now. However, after many rounds of troubleshooting, I've been unable to determine the cause.
The only symptoms are a slight decrease in mpg and an rpm loop effect during cold weather start up.
-cleaned MAF (two wires are still intact)
-Removed Intake manifold to check for gasket leaks
-Replaced PCV valve and grommet around it.
-unable to find any leaks on the vacuum lines. (I might be missing 1 or 2, a diagram would be nice!)
-replaced fuel filter
I'm looking to sell this truck soon, and didn't really want to sink a whole lot of money into it, but would like to have this resolved.
After searching through numerous posts, I see many people have problems with the PCV elbow. Where is it on a 4.2. I know it's near the firewall on other engines, but after removing the intake manifold I couldn't find it.
Any suggestions or other ideas?