Yes because the ecu need to re learn the proper mixture for the new injectors

 

Hey anyone know how to reset the PCM on a 92?

 

no you don't need to reset the pcm unless you have problems after the swap, or had very poor MPGs and running before the swap.

The computer relearns the A/F ratios quickly if you don't reset it - if you reset it it may take up to 50 warm up cycles to relearn and you'll be running rich most of the time.

 

I'm sure it says it somewhere I'm this thread but what are the major differences between 703 and 784 injectors I have sets of both and I'm looking to upgrade my stock injectors on my 98 xj

 

703 and 784 are the same injector mechanicals with different connectors. Jetronic on the 703s is appropriate for XJs from 1987 through 1998 model years. Starting in the 1999 model year Chrysler changed to USCAR connectors, so 784s should be used.

You want 703s for your '98

 

Okay thanks for clearing that up

 

do you really get better mileage to the point that its worth the 200+ investment?

 

$200, no. Buying a set of refurbed ones of programbo on here, yes. And you'll only see mpg gains if your stock injectors are dirty, an even them the gain is minimal.

 

No. People who see mileage improvements had dirty injectors prior to the swap.

What $200+ investment?

 

I just bought some refurb ones from ebay. Lifetime warranty. 6 shipped for $70.

Ebay Seller: Masterinjectors

 

Can someone please help me with a part number for the service kits on the 703. None of my pintle caps can be reused and I want to replace the screens. I am trying to find locally since one of my injectors is leaking pretty bad

 

These are the rebuild kits i use. Guy ships pretty fast

http://www.bonanza.com/listings/Bosc...6-Cyl/42334375

 

I could never figure out how to get those filters out :facepalm:

 

I use a wood screw that's slightly smaller than the inlet hole, screw it into the filter ~3/8", and pull hard with some pliers.

 

Thanks Dukie