88 F250 5.0 Oil in upper intake contaminating TPS ,What would be your guess as to why?
88 F250 5.0 with Edelbrock intake + BBK throttle body seems to be vacuuming oil from PCV into the upper intake .
The truck runs great it's just that every 4 - 6 months I have to put a new TPS in .
What would be your guess as to how I'm ending up with oil in my throttle body ?
- CBLv 76 years agoBest Answer
Malfunctioning or incorrect PCV valve would be my first guess. Maybe need a valve with a different vacuum weight?
- 5 years ago
- KnucklesLv 76 years ago
Crankcase pressure from combustion blow-by. Remember, 5.0L's have those 4mm metric piston rings (nototious for a short life span).