compression numbers?? for a 7.3 IDI
I have a 89 7.3 IDI that has QUITE a few miles on it in a F-superduty rollback tow truck.
It is smoking slighty and I'm wondering just how close it is to needing a refreshening.
I know I have to buy the tester for a diesel, but what kind of compression numbers should I see on a 7.3??