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  • 1996 - 2004 SN95 Mustang -General/Talk-

Help!!! Crankcase Over Pressure (pcv System Fail)

  • Thread starter Thread starter Puggy_sd455
  • Start date Start date May 2, 2016

Puggy_sd455

Active Member
May 10, 2015
136
41
38
Marion Ohio
May 2, 2016
#1
  • May 2, 2016
  • #1
OK I need some help.... So my 96 Mustang GT has developed an over pressure problem in the crankcase the PCV system is seems to be completely blocked somehow and is not letting the crankcase vent off any pressure and I have NO idea how to fix it...

It was a little over full on oil but is not now and has a new PCV valve (JUST INSTALLED) there is a bit of oil in the hose from the valve to plenum. The hose from the driver side valve cover in the air intake seems to be the main problem somehow you can blow into it and it comes out the PCV valve but seems to be blocked if you try to suck air threw it...

 
Last edited: May 2, 2016

screamin gt

5 Year Member
Apr 9, 2007
393
6
28
central CT
May 10, 2016
#2
  • May 10, 2016
  • #2
Backwards? Aren't those one way valves?
 

Puggy_sd455

Active Member
May 10, 2015
136
41
38
Marion Ohio
May 10, 2016
#3
  • May 10, 2016
  • #3
Everything is hooked up the way its always been.... It started one day when I was in a hurry I overfilled the oil a little and its been like this even sins... The cars been parked but I still start it trying to ether figure out whats wrong to burn out want ever making it act like this...
 
T

ThaFonz

Member
May 12, 2016
44
0
6
May 18, 2016
#4
  • May 18, 2016
  • #4
Puggy_sd455 said:
OK I need some help.... So my 96 Mustang GT has developed an over pressure problem in the crankcase the PCV system is seems to be completely blocked somehow and is not letting the crankcase vent off any pressure and I have NO idea how to fix it...

It was a little over full on oil but is not now and has a new PCV valve (JUST INSTALLED) there is a bit of oil in the hose from the valve to plenum. The hose from the driver side valve cover in the air intake seems to be the main problem somehow you can blow into it and it comes out the PCV valve but seems to be blocked if you try to suck air threw it...

Click to expand...
Hmmm, okay step one, replace the hose and the valve as well drain all the oil from the motor and start from the beginning of an oil change. New filter as well and you're going to put in 4.5-5 quarts of oil, check it on level ground and clean the areas where the PCV valve go into the valve covers. making sure that you have the right amount of oil, go ahead and clear any CEL codes you have if any then reinstall the parts making sure the connections are good and where they're supposed to go. Start the car and shouldn't have any issues.
Hopefully this will work for you, good luck.
 

Puggy_sd455

Active Member
May 10, 2015
136
41
38
Marion Ohio
May 21, 2016
#5
  • May 21, 2016
  • #5
Well I already did everything else so when I get a chance I'll change the oil and filter and re-clean everything
 
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