I have been looking around for some good injectors to put in my 87 4.0. I've read through a couple threads and I have some idea of what I would like but before I make a final decision I was wondering if the injectors out of the new 4.0s from roughly 05 would work if I spliced in the pigtails?

 

i installed the 703s on my 89 works much better better idle and throttle responce.

 

dont know what the pressure would be but remember more fuel in you gotta let more air in and out to get all the power header better intake bigger exhaust .it might be to much fuel for a stock 4.0

 

02 was the last year of the 4.0, and the injector plugs were different, and were still only a single hole injector. the chrysler 0280155703 injectors found in alot of mid 90's cars with the 2.4 are a great upgrade, that's what I'm running in mine. Same pressure, same spray angle, 4 holes, better atomization.

 

What models did the ford injectors and the chrysler FPR from the chart come in?

 

Incorrect. 2006 was the last year of the 4.0 i6. The TJ (97-06 Wranglers) had the option of either a 2.5 4cyl (available until '03 when it was replaced by a 2.4) or the 4.0i6 until the end of its production. "Pig tailing" the connection would work, but I'd recommend going with a set of 703's instead of the stock 4.0 ones. Plus, the 703's won't require you to swap in a different FPR, unlike the Ford 710's.

97-01 Stratus' with the 2.4 will be the most common vehicle to find 703's in. You'll need to find 2 of them though, as the 2.4 is a 4cyl. Some 97-01 Neons with the 2.0 4cyl used the 703's as well, but they also used 740's, so make sure to check the part number on the injectors themselves to be sure they're 703's. The rest of the vehicles are on that chart, but these are the two cars 703's are most likely to be found in.

 

Awesome info. Thank you.
I know the 710s require a new FPR and rail, but is it worth it? I don't mind swapping if im get something out of it that I can't get from the 703s.

 

You honestly don't get anything more out of it. I'd just go with the 703's. Make sure to properly clean them, use new o-rings (lube the o-rings before installing the new injectors), and to reset the ECU after doing the swap.

 

its an 87 just install and go

 

Awesome. Sounds good. I'm assuming that resetting the ECU consists of just disconnecting the battery for a few minutes?

 

To reset your ECU:

1. Unhook the positive and negative battery terminals
2. Hold the terminals together for 30 seconds
3. Reattach the terminals to the battery
4. Turn your ignition to 'on' - DO NOT START YOUR XJ
5. Turn your headlights on and leave them on for 10 seconds
6. Turn your headlights off
7. Turn the ignition to 'off'
8. Start your XJ

It'll take 50 warm-up cycles for the ECU to "re-learn" the fuel trim levels.