Power Fading

[Centrevillemx]

If the 4.0 liter is rated at 190 hp and 225 lb. ft. what would it be at 160k with regular maitenence? ('90 pioneer 4x4 4door)

[Judd W. VA]

No one's jumping on this one-

I will say this, it depends on the condition of your engine. No doubt there will be some losses due to the mileage. To get an idea is to do a compression or/and leak down test of the cyls. The closer to new the readings, the better. If very close to that of new, then should still be up there toward new HP specs. We are asuming good tune-up, adequate fuel supply, well functioning injectors, good cam/lifters.