- 06-04-12 01:03 PM #1Cadillac Owners Enthusiast
- Automobile(s): 2005 STS N*, 1SF, 135K mi.
- Join Date
- Apr 2011
- Fort Worth
Yay! PO174 fixed
Turns out, when I changed the air filter weekend before last, I didn't get the hose clamp on the intake hose connected to the intake manifold quite tight enough.
Tip: use an 8mm or 5/16" nutdriver or socket to tighten it, not a flathead screwdriver.
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