The Definitive Injector Swap HOW TO - Page 18 - JeepForum.com

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post #256 of 675 Old 06-27-2012, 03:51 PM
coralman
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Any gains,or losses for that matter cannot be trusted totally by looking at the overhead display. The pulse width of the injector may be different which the pcm may alter as it learns the new injectors. To get a somewhat accurate mpg figure do it the old fashioned way, miles driven and fuel used.


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http://www.jeepforum.com/forum/f13/c...-faqs-2863665/

Originally Posted by HighLonesome
lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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post #257 of 675 Old 06-27-2012, 04:00 PM
ejschultz
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I started the rebuild process for my 703s today that I picked up like 2 months ago from the JY. I've got them soaking in carb cleaner right now to loosen up any sort of debris. I'm not going to power them up and attempt to clean up the insides. I'm making sure the pintle is clean as well as changing the O rings and screens. I hope this all goes well...

97 ZJ - 5.2L, 242, 4" IRO lift w/short arms & adj. TBs, JKS Discos/BPEs, DT3000s, Aussie'd 44A, sliders, bumpers, bunch o' skids, 31" Duratracs on 15x8s
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post #258 of 675 Old 06-28-2012, 10:47 AM
johnt671
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I found that the only difference in using the overhead console vs the miles driven /gas used was only a couple of tenth of a mile. 16.73 to 16.7. for example. Since I don't launch rockets for a living the overhead console is accurate enough for me.
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post #259 of 675 Old 07-02-2012, 03:22 PM
ejschultz
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I got the 703s in today. So far the only thing I've been able to notice is the incredibly smooth idle. It feels like it may have slightly better throttle response than it had before, but that could be because I completely tore down the 703s and rebuilt them. It could also be psychological. I will comment after a couple tanks of gas about the mileage differences.

This is another success story for a 96-98 (97) 5.2L with 703s.

97 ZJ - 5.2L, 242, 4" IRO lift w/short arms & adj. TBs, JKS Discos/BPEs, DT3000s, Aussie'd 44A, sliders, bumpers, bunch o' skids, 31" Duratracs on 15x8s
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post #260 of 675 Old 07-11-2012, 10:43 PM
OnAll4sZJ
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Quote:
Originally Posted by ozzy_2_me
ok, i went to the junkyard today and found some 710 injectors to try out this swap to see what all the fuss is about. to answer dpshoup's question it's a 8mm deep socket. and bring a flat screwdriver with you. that's all you need. I was luckey enough to find a set of 710 injectors that look practicly bran new. when i pulled them out they where like super clean. when i got back home i switched them out, turned the key on and off a couple times and left the key on and then went to check to see if there was any fuel leaks. all was good so i started it up and started a litttle rough then smoothed out. like really smooth out. this is the smoothest idle i have very seen/heard from this jeep. i let it idle for about 15 minutes and while it was idling i was still looking for any fuel leaks. still couldn't see any. i guess it is good thing. after that i shut it off restarted and took it for a spin. i can report that it has better thottle response and as for any increase i gas mileage it is to early to tell. i will report back in a couple days of driving. the one thing i think that is lacking so far in this thread is a vehicle list for the 710 injectors. i totally forgot which vehicle it was that i got mine from other then it like a grand marqui or lincoln ....something like that the year was like around 96 or maybe 97. if some can chim in and maybe provide a list i think that would greatly help this thread and all the guy's and gals out there with the 5.2 that want to try the 710's out. thanks again for this thread. other then the lacking info on the 710's it was a weath of info.
I also would like a list of 710 donors as well as 784 donors, for the 98+ guys...

I will be going to the JY this weekend. So maybe I can start a list of what I find
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post #261 of 675 Old 07-21-2012, 11:50 PM
torchd
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Add Me To The List - CONFIRMED

Yesterday I installed my "703" injectors on my 98 4.SLOW.


They hooked up w/o any problems. First start after priming them a couple of times car ran a little rough, but that was b/c yesterday I installed my injectors, a new header and a WJ intake..


My impressions.. Idle is sooooo much smoother, acceleration is great, but then again that might be bc of the header and intake I did at the same time..

All in all, worked PERFECTLY for me!!!

1998 Jeep Grand Cherokee Laredo
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

2002 Trans Am
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
420 RWHP and 382 RWHTQ
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post #262 of 675 Old 08-21-2012, 02:52 PM
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Another confirmed 703 install in my 98 Cherokee 4.0. Runs great, smooth idle and easy install. I have already saw an extra 40 miles on my last tank of gas. Will update when they have been in longer
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post #263 of 675 Old 08-22-2012, 05:16 AM
ejschultz
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Quote:
Originally Posted by ejschultz View Post
I got the 703s in today. So far the only thing I've been able to notice is the incredibly smooth idle. It feels like it may have slightly better throttle response than it had before, but that could be because I completely tore down the 703s and rebuilt them. It could also be psychological. I will comment after a couple tanks of gas about the mileage differences.

This is another success story for a 96-98 (97) 5.2L with 703s.
My gas mileage seems to have slightly increased by about 1.5 mpg. I used to sit around 12-13 mpg and now I'm averaging between 13-14.5 mpg, sometimes a little better than that. Now, the true test will be to see if my leaky plenum fix helps any.

97 ZJ - 5.2L, 242, 4" IRO lift w/short arms & adj. TBs, JKS Discos/BPEs, DT3000s, Aussie'd 44A, sliders, bumpers, bunch o' skids, 31" Duratracs on 15x8s
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post #264 of 675 Old 09-18-2012, 02:19 PM
KyBoy1991
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Would it still be advisable to change to the 703 injectors in my 4.0 after changing to a new 2001 intake that came with fuel rail and injectors? Or, are the new injectors better to keep or will they even work?
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post #265 of 675 Old 09-18-2012, 02:42 PM
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I don't know much about the WJ injectors. I'd imagine they have single hole pintles like the ZJ injectors. If that's the case, the main purpose to going to the 703s is for the 4 hole pintle design to allow for better atomization of the fuel.

97 ZJ - 5.2L, 242, 4" IRO lift w/short arms & adj. TBs, JKS Discos/BPEs, DT3000s, Aussie'd 44A, sliders, bumpers, bunch o' skids, 31" Duratracs on 15x8s
Build
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post #266 of 675 Old 09-18-2012, 03:38 PM
melk
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Yeah you don't want the wj injectors
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post #267 of 675 Old 09-18-2012, 08:14 PM
torchd
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Yes the WJ fuel injectors are just like the ZJ injectors; they both have the single hole for the spray.


You don't want that, the "703" injectors have the 4 holes for the spray

1998 Jeep Grand Cherokee Laredo
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

2002 Trans Am
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
420 RWHP and 382 RWHTQ
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post #268 of 675 Old 09-18-2012, 09:49 PM Thread Starter
zander21510
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Quote:
Originally Posted by KyBoy1991
Would it still be advisable to change to the 703 injectors in my 4.0 after changing to a new 2001 intake that came with fuel rail and injectors? Or, are the new injectors better to keep or will they even work?
IIRC don't wj injectors have the different connector anyways? I seem to remember looking at a wj in the jy and it had the different connectors
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post #269 of 675 Old 09-19-2012, 10:28 AM
KyBoy1991
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Quote:
Originally Posted by zander21510 View Post
IIRC don't wj injectors have the different connector anyways? I seem to remember looking at a wj in the jy and it had the different connectors
I honestly haven't looked at them close enough. I bought the thing for the intake...and it came with a power steering pump, bracket, fuel rail, injectors, throttle body....IMO it was a steal of a deal for $100 shipped.

So I just wanted to know if what I needed to still get or reuse before putting it on.
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post #270 of 675 Old 09-24-2012, 07:49 AM
riot1987
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I pulled my injectors from a 97 neon. I cant seem to get the filters out on them.. Am I doing something wrong? Should I just not worry about the filters and replace the o-rings? Did I get the wrong injectors?

http://www.jeepforum.com/forum/f22/riots-97-grand-1436100/

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703 , 715 , ford , fuel injector , neon , swap

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