I had new injectors put in my Jeep and went from 19 to 26 MPG. I believe the injectors were original and had 155K miles. The engine is a reman and has much less but they would have used the old manifolds, etc. The new injectors are 4 port injectors that are a direct fit for the OEM single port ones (new ones supplied by Trav (Paul)). I was expecting 10 - 15 % improvement but this is about 25%. But as they say YMMV.
Last edited by a moderator: