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Engine code P1131. How to check for vacuum leak with WD-40 and/or test O2 sensors?

Tiny
SPAWNEDINHELL
  • MEMBER
  • 2001 FORD ESCORT
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 112,000 MILES
Engine code p1131. How to check for vacuum leak with WD-40 and/or test O2 sensors?

I've done a lot of work on this car, but I've never checked for vacuum leaks before. I don't even know which hoses ARE vacuum hoses. The only thing I have to test it with is a can of WD-40. Which hoses do I check? Any helpful tips?

My problem also might be a bad O2 sensor. How might I go about testing them to see if they are still good? I do have a digital multimeter that I can use.
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Monday, March 28th, 2011 AT 5:46 PM

1 Reply

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I personally use Starter Fluid or carb cleaner---DO IT OUTSIDE/ AWAY FROM STUFF/ HAVE FIRE FIGHTING EQUIPMENT ON STANDBY! NO JOKE.A FIRE CAN HAPPEN! Vacuum lines are not all necessarily rubber hoses, they can be plastic tubes also----Sounds like you may need a little more help than I can provide in TEXT. Some great sources of info and even someone VISUALLY pointing out what you need to know, Is a Small Time Auto Salvage Yard--Or a Popular Parts Store (I strongly recommend this. Eat your pride!) The Medic
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Tuesday, March 29th, 2011 AT 4:10 AM

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