Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Question about post-cat O2 sensor
View Single Post
Old 04-02-2013, 10:40 AM   #21
Focus Enthusiast
Join Date: Mar 2012
Fan#: 97061
Location: South Lyon, MI
What I Drive: 2005 Silver ZX3

Posts: 78
FF Reputation: 1 VillageT Good Standing Member
Buy-Sell-Trade Rating: (0)
I went through a similar issue with a Ztec. It turned out it was the hose to the PCV. I had also sprayed all the hoses but this one fails underneath were you can't see it and you can't spray in that area. We finally took it to a shop with "smoke test" equipment and they found it in a couple minutes. This equipment puts smoke into the engine and it is easy to see where the leaks are.
VillageT is offline  
    Reply With Quote