I'm thinking of bidding on a 2008 F250 with a 6.4L at auction. There are two comments on the ad that I'm not familiar with. One is that there is blow by @ idle. The second is, fault indicator shuts off after engine oil press rises. Is either of these serious problems?
Gruncle

 

blow by at idle is normal..the way the motor is built it requires heat and then expansion to create the best seal around the rings. Heavy boost motor.

Did you get codes as to what the fault is? Check engine light or the wrench symbol?

Any pictures of this truck we can look at?