The Definitive Injector Swap HOW TO - Page 32 - JeepForum.com
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post #466 of 675 Old 07-31-2013, 07:24 PM
ejschultz
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I'm going to pose a question: has anyone reconditioned their stock injectors to see what kind of difference it yields compared to 703s? I have a gut feeling that might be a better option than 703s. I'm throwing this out there as food for thought. I have 703s and I'd say they perform marginally better than stock injectors with 90k on them. I'm thinking about reconditioning my stocks to see how they compare.


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 #467 of 675 Old 07-31-2013, 07:39 PM Thread Starter
zander21510
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Quote:
Originally Posted by ejschultz View Post
I'm going to pose a question: has anyone reconditioned their stock injectors to see what kind of difference it yields compared to 703s? I have a gut feeling that might be a better option than 703s. I'm throwing this out there as food for thought. I have 703s and I'd say they perform marginally better than stock injectors with 90k on them. I'm thinking about reconditioning my stocks to see how they compare.
I think the whole point of the 703s are their better 4-hole atomization design. I didn't recondition my 703s personally...they came out of a couple of 97s in the junkyard...so they were probably comparable in age and condition.
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post #468 of 675 Old 07-31-2013, 07:42 PM
DickDickle
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I'm STILL looking for two more so I can do this swap I've searched three entire junkyards and came up with four
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post #469 of 675 Old 07-31-2013, 07:53 PM
ejschultz
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Quote:
Originally Posted by zander21510 View Post
I think the whole point of the 703s are their better 4-hole atomization design. I didn't recondition my 703s personally...they came out of a couple of 97s in the junkyard...so they were probably comparable in age and condition.
I understand the argument and halfway believe it. I'm running 703s, as I stated. I just want to do an experiment and figured I'd pose the question. I bet no one one this forum has reconditioned their stock injectors.

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 #470 of 675 Old 07-31-2013, 08:07 PM Thread Starter
zander21510
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Originally Posted by ejschultz View Post
I understand the argument and halfway believe it. I'm running 703s, as I stated. I just want to do an experiment and figured I'd pose the question. I bet no one one this forum has reconditioned their stock injectors.
That is probably true. It would be interesting to see
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post #471 of 675 Old 07-31-2013, 08:31 PM
coralman
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I had batted that idea around myself. If I had the time, I would carry it a step further and do some mod analysis on the wj intake and header combo as well. I wouldn't be quite insane enough to test them individually { which would negate the results of individual benefit} but say stock injector new or rebuilt, cleaned stock manifold, and new bellows style exhaust manifold{OE or dorman} vs 703's new or rebuilt,wj manifold, and a apn header. Both on an updated cat and cat back.

I have watched these mods for over a year and labor wise there is not much difference,except you would be doing everything twice. Its just the uncertain aspects of them that have kept me on the fence. Eventually, I will have to commit one way or the other or both, but it will have to cool off some first.

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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 #472 of 675 Old 08-01-2013, 05:51 AM
zj97ltd
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Quote:
Originally Posted by ejschultz View Post
I understand the argument and halfway believe it. I'm running 703s, as I stated. I just want to do an experiment and figured I'd pose the question. I bet no one one this forum has reconditioned their stock injectors.
I've been wondering this too. To me, "reconditioned" 703s vs. 100,000+ mile stock injectors isn't an apples to apples comparison.
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post #473 of 675 Old 08-01-2013, 05:53 AM
ejschultz
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Quote:
Originally Posted by zander21510 View Post
That is probably true. It would be interesting to see
If I can free up some time between work and my other infinite number of projects, I'll do it.

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 #474 of 675 Old 08-01-2013, 03:10 PM
jnowak
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Quote:
Originally Posted by DickDickle View Post
I'm STILL looking for two more so I can do this swap I've searched three entire junkyards and came up with four
That stinks. I got two sets out of one yard. And passed up more cause they didn't pop with my tester.
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post #475 of 675 Old 08-01-2013, 04:18 PM
CatSplat
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Quote:
Originally Posted by ejschultz View Post
I understand the argument and halfway believe it. I'm running 703s, as I stated. I just want to do an experiment and figured I'd pose the question. I bet no one one this forum has reconditioned their stock injectors.
I didn't recondition them, no, but I did pull a few filter baskets out of my old stockers to see what 400,000k looked like. Turns out that the inline fuel filter does a pretty good job - the injector filters, apart from being discoloured from years of gasoline, didn't have any noticeable gunk in them. I was actually quite surprised. When I ran the spray pattern tests before flow matching, it was done with new baskets in both styles of injector.

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post #476 of 675 Old 08-01-2013, 09:53 PM
bigb229
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I reconditioned my stock injectors while rebuilding my 4.0l recently. Only difference to note is a smoother idle. I'm running a comp cam 99 intake bored throttle body, msd ignition, plugs gapped to 45 thousandths. And manga flow exhaust. It's a standard bore. I swapped in some 703s and haven't noticed any loss or gain but a silky smooth idle.
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post #477 of 675 Old 08-22-2013, 04:13 PM
NJ2MDJim
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Great write-up. Thanks very much!
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post #478 of 675 Old 08-22-2013, 06:40 PM
Mity White 96
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Mileage has absolutely improved with the 703s

With about 175K on the odometer, I used to be lucky to get close to 15mpg on average. Sometimes I'd get close to 16 under really special conditions but that was rare. Having swapped out the injectors for 703s, I recently measured almost a full tank usage at 17.7mpg. That's way better no matter how you choose to measure it. But what's really valuable is that my fuel tank range has also picked up at least another 35 miles or so. I'm absolutely enjoying this conversion to the 703s.
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post #479 of 675 Old 08-27-2013, 05:47 PM
Phreaq
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I think I got hosed ...
http://www.ebay.com/itm/96-97-98-Jee...item3a7e15d137
(The adapters pictured do not come with the injectors .... Nor did he sell them .... Found that out a little late)
Turned out to be XF2E-C4B ford injectors. The description did not mention parts number, my fault for not checking.
Is anyone familiar with these injectors?
I installed them on a 98 ZJ 4.0
I am having rough idle and p0301 (if the adapters were not working there would be a p020x for that cylinder)


Edit: swapped injectors one and two, same code returns. While I still question the injectors, they do not seem to be causing my p0301.
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post #480 of 675 Old 09-14-2013, 05:03 PM
riot1987
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Just put 703's in my 5.2. It stumbled for a bit at first and then the idle smoothed out and it seems to run great. Throttle response seems to be better and it seems smoother between shifts with less lag. Took about 2.5 hours to do. Pretty painless all in all.

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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