PCV hose blew from engine

2001 FORD ESCAPE
200,000 MILES • 3.0L • V6 • 4WD • AUTOMATIC
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KRYPT777
  • MEMBER
  • 1 POST
Hi.
I recently purchased the vehicle listed above second hand.
It was shuddering on cold start when taking off and also around the 80kmph mark if i let off acceleration and then tried to accelerate again.
I changed transmission fluid (was brownish but no metal flake etc ) and
Added an anti shudder.
I was changing engine oil and filter today which seemed normal procedure.
After i had refilled oil i then wanted to change fuel filter.
To do this i was advised to remove fuel fuse, start car to relieve pressure in filter for easier removal.
I took the fuse out, started the car and immediately heard a very loud bang and white smoke. Turned off ignition immediately and inspected motor and found the PCV hose at the top back of the engine had blown off completely.
What has caused this to happen?
It started and ran okay after transmission fluid change.
Jul 30, 2019 at 1:22 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

This sounds like the engine backfired and that backfire blew the PCV out of the rubber mounting.

Did you reinstall it and start the engine?

If you can, upload a picture or video for me to view.

Roy
Jul 30, 2019 at 3:17 AM
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BMDOUBLE
  • ✓ASE Certified Mechanic
  • 1,139 POSTS
  • ASE Certified Mechanic
lean misfire due to the low fuel pressure, Re-attach hose and it should be fine. These engine are well known for faulty intake gaskets that cause lean conditions on cold starts, removing fuel from the system just intensified that condition which is probably why it backfired in my opinion.
Jul 30, 2019 at 12:47 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Did you respond? We got emails but nothing came up on our side?

Roy
Jul 31, 2019 at 4:10 PM
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