Will swapping out my stock injectors in my '98 help improve my MPG's? I am not having any problems. This is my dd and I keep up on the maintenance. I understand it's never going to be a hybrid but IL gas is expensive. Thanks in advance for any input.

 

784s won't fit into a 1998 XJ, so either your fuel economy will be infinite because you aren't burning any fuel at all, or 0 because you aren't going anywhere!

703s or similar will only improve economy if your current are dirty and clogged. Any MPG gains are from swapping filthy injectors to clean injectors.

Have you take a look at one of the twelve billion poor mileage threads? What fuel economy are you getting now?

 

I have not taken anything apart or bought any parts yet. I have been reading about them and wondering if it is worth the time.

 

I did not look up any other threads. I did not even think of looking up threads here.

 

I did the swap in mine. Not sure about a change in mileage since i was getting pretty good mpgs already, but it did seem to smooth it out and help with startup on cold mornings. If you got the itch to mod and dont want to spend muh money, i would say go a head and do it.