Winding Noise
#1
Senior Member
Thread Starter
Winding Noise
When i turn my truck off it makes a winding noise from the engine like something is still rotating slowly. Ive tried listening but cant narrow it down. Its the 5.4 Thanks for any input.
#2
Senior Member
Rest your hand on the EVR solenoid while hearing the noise, - that's what your hearing. No worries, normal.
#3
Senior Member
Thread Starter
#4
Senior Member
No, that is the EGR valve. Follow the green hose coming off of that nipple on the EGR valve, and you'll run into this (circled), the EVR solenoid.
#5
Senior Member
Yup, that's it. The solenoid is purging vacuum after shutdown. That vacuum is used to open the popet in the EGR valve during cruising speeds upon command from the executive or PCM command. Which assists emissions and nets better economy. Often, they will play a tune when purging.
Last edited by Jbrew; 08-15-2018 at 12:26 PM.