2003 Ford F150 , Idle Surges, Stalls, Multiple Lean Codes.

This 2003 Ford F150 came in with multiple complaints among which were a surging idle, stalling condition and the service engine soon light on. I did a quick check of the engine codes and found multiple lean codes.  I opened the hood with the engine running and could hear the familiar sound of sucking air. Fords for some reason are prone to developing vacuum leaks at the pcv valve hose, where it connects to the intake. In the following picture I am pointing to the hose connection that is leaking.

It took some effort and the use of long screwdrivers to force the rubber elbow of of the rear intake port.

With the hose removed it is easy to see the gaping hole in the rubber elbow.

The new hose is installed and I am pointing to the end that connects to the pcv valve. To install the hose, I routed the hose back into the original hoses position. Starting at the pcv valve area. I maneuvered the rubber elbow back into position at the intake port. Then I had to reach around both sides of the intake to get enough force on the hose for it to start onto the rear intake tube. Once it was lined up and slightly started I used a long hooked tool for more leverage in installing the hose elbow to the intake tube.

I then cleared the codes and started the engine. Took it for a test drive and monitored fuel trims. The fuel trims were normal and this one was done.

1 discussions on “2003 Ford F150 , Idle Surges, Stalls, Multiple Lean Codes.”

  1. Buddy boy you are the cats pajamas. I popped the hood, located the hose, covered the suspect location of hole, idle smoothed out, and I am back in business. I never sign onto anything on the net. I signed on to tell you the answer was brilliant. Thanks

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