2007 Ford F150 comes in from Hayward with a "check engine light" on & it barely runs. Our tech tests for codes and comes up with P0171, bank 1 lean. The computer is dumping fuel to bank 1, pulling fuel from bank 2. A dynamic compression test synced with #1coil shows low compression on cyl #1. A pressure test of the cylinder indicates the intake valve is stuck open. Removing the valve cover we find cyl #1 intake valve stuck open, the cam is worn out, & the rocker arm is missing (must be in there somewhere). Yet still, no missfire codes in the trucks computer.
If you have a check engine light on , or need "engine diagnostic test" call us today! Mention this post & get $20 off your test!