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Unread 04-23-2014, 04:44 PM   #616
cbeam2
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One of the ebay guys selling injectors recommends the 710's instead of 703's on stock 4.0. His reason was you don't need the higher flow. I see most talk about using the 703,s, are they bring used more for a higher flow?

What about you guys using the 710's? Happy happy happy or what?


Chuck

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Unread 04-23-2014, 04:50 PM   #617
CatSplat
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Quote:
Originally Posted by zander21510 View Post
You all might have noticed I redid the original post so that it's a little better organized and easier to understand, and removing some useless information. Hope you all like it!
Your removal of my primer on connector and injector body designs displeases me.
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Unread 04-24-2014, 02:33 AM   #618
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Finally read it all but it's great
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Unread 04-29-2014, 12:21 PM   #619
hezx
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Just did this swap with these 789 Ford branded injectors. This Jeep has never run better. Defiantly worth the money.
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Unread 05-05-2014, 11:29 AM   #620
MountainMan303
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Haven't scoped this thread fully, only partially. But for time's sake, any opinions on paying $150 for local pickup of 6 Bosch '703's that have been cleaned, pressure tested, and repaired, considering getting them at the JY is $5-$10 per injector, and $25 on the rebuild kit?

I spent 2 separate trips this weekend looking for these the the local JY's, and either already pulled or trashed beyond repair.....
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Unread 05-05-2014, 12:09 PM   #621
zander21510
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Quote:
Originally Posted by MountainMan303 View Post
Haven't scoped this thread fully, only partially. But for time's sake, any opinions on paying $150 for local pickup of 6 Bosch '703's that have been cleaned, pressure tested, and repaired, considering getting them at the JY is $5-$10 per injector, and $25 on the rebuild kit?

I spent 2 separate trips this weekend looking for these the the local JY's, and either already pulled or trashed beyond repair.....
You can check eBay but I don't know of anything that can be local pickup unless you can find a local place that will sell those injectors new
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Unread 05-05-2014, 12:12 PM   #622
tirus89
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The 5.2l/5.9l swap how to link doesn't work. Still.

Not that I need it, just for continuity sake and for the newbies.
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Unread 05-10-2014, 07:00 PM   #623
MountainMan303
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Just replaced mine with the 703's I bought off of eBay. Didn't undo the throttle cable or anything like that, just loosened the bracket out of the way. Replaced them, and now it sounds like I'm running rich or misfiring or something.........what am I doing wrong? Can anyone help? The injector closest to my firewall seems as though it has more space between the intake manifold and the injector, just a hair more than the other ones. Everything seemed to go in smoothly? I have no clue what could be happening.
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Unread 05-11-2014, 04:13 PM   #624
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Sounds like injector is stuck.
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Unread 05-18-2014, 12:13 PM   #625
MountainMan303
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Tried the install of the 703's yesterday on my 4.0l. Nothing leaking, full fuel pressure in the rail. Seems like its either running rich, or missing a cylinder somehow. Hard to determine what's happening with my manifold leak, but I definitely don't think it should sound or perform the way it is (chuffing/non-smooth sounding exhaust). Anyone have any suggestions? Does the computer need a couple days to learn? If it is stuck like cbeam2 says, any quick ways to resolve this?
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Unread 05-18-2014, 12:22 PM   #626
zander21510
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Quote:
Originally Posted by MountainMan303 View Post
Tried the install of the 703's yesterday on my 4.0l. Nothing leaking, full fuel pressure in the rail. Seems like its either running rich, or missing a cylinder somehow. Hard to determine what's happening with my manifold leak, but I definitely don't think it should sound or perform the way it is (chuffing/non-smooth sounding exhaust). Anyone have any suggestions? Does the computer need a couple days to learn? If it is stuck like cbeam2 says, any quick ways to resolve this?
Did you unhook the battery? Let it sit overnight without the battery to reset it
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Unread 05-19-2014, 02:33 AM   #627
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Quote:
Originally Posted by MountainMan303 View Post
Tried the install of the 703's yesterday on my 4.0l. Nothing leaking, full fuel pressure in the rail. Seems like its either running rich, or missing a cylinder somehow. Hard to determine what's happening with my manifold leak, but I definitely don't think it should sound or perform the way it is (chuffing/non-smooth sounding exhaust). Anyone have any suggestions? Does the computer need a couple days to learn? If it is stuck like cbeam2 says, any quick ways to resolve this?
My buddy's 96 4.0 did the same thing. No matter what we tried with it, it kept running rich. He ended up rebuilding his stock 778s and put them back.
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Unread 05-19-2014, 08:44 AM   #628
MountainMan303
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Battery unhooked while I was swapping, and again last night. No difference this morning, still running poorly.

Fairly certain that one could be stuck open or malfunctioning. Anyone have ideas as to a quick way to find out/test which one is stuck? I really don't want to give up on these.
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Unread 05-19-2014, 09:52 AM   #629
zander21510
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Quote:
Originally Posted by MountainMan303 View Post
Battery unhooked while I was swapping, and again last night. No difference this morning, still running poorly.

Fairly certain that one could be stuck open or malfunctioning. Anyone have ideas as to a quick way to find out/test which one is stuck? I really don't want to give up on these.
Best way to find a leak is described in op
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Unread 05-19-2014, 11:02 AM   #630
tetatdo
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So im having trouble passing CA smog with the 703 injectors installed. My truck is a 94 ZJ 4.0. with the 99+ WJ manifold installed. Do the 703's not flow enough fuel for my setup?

Im passing the 15 mph with flying colors but it seems to be leaning out on 25mph under load.

From what I read on here, the 703's flow about 1.2 or 1.3 lb less than the stock siemens? would this make a huge difference?
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