The Definitive Injector Swap HOW TO - Page 27 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > The Definitive Injector Swap HOW TO

Stainless Steel Door Hinge PinsPoly Door Hinge BushingsSave at JeepHut on Smittybilt Soft tops

Reply
Unread 03-03-2013, 08:12 AM   #391
torchd
Registered User
1998 ZJ 
 
Join Date: Jan 2010
Location: Chicago
Posts: 2,351
Quote:
Originally Posted by coralman
Torchd, I need some good pics of your front pipe, including where it attaches to the header, so I can say"see like this" to the exhaust dudes.
I'll see what I can do about getting you some good pics of the front pipe!!

Sent from my iPhone using JeepForum

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

[b][color=red]2002 Trans Am[/b][/color]
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
[b]420 RWHP and 382 RWHTQ[/b]
torchd is offline   Reply With Quote
Unread 03-03-2013, 08:28 AM   #392
Primordial
Registered User
1995 ZJ 
 
Join Date: Jan 2013
Location: Goose Creek, SC
Posts: 237
What's a good price for junkyard 703s? They want about $10/injector around here.
Primordial is offline   Reply With Quote
Unread 03-03-2013, 08:40 AM   #393
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, MD
Posts: 15,985
Quote:
Originally Posted by Primordial View Post
What's a good price for junkyard 703s? They want about $10/injector around here.
I paid around 5 bucks per injector.
PolkaPower is offline   Reply With Quote
Unread 03-03-2013, 09:31 AM   #394
zander21510
Lord of Retro Machines
 
zander21510's Avatar
1995 ZJ 
 
Join Date: Jun 2011
Location: Dallas, TX
Posts: 1,805
Quote:
Originally Posted by Uniblurb

Not necessarily true since if you look back at the first post in this thread (towards the middle) it's confirmed for some users the 703's work for 93-95 with the 39psi system. In fact that's what zander21510 w/95 4.0 who created this thread is running.

http://www.jeepforum.com/forum/f13/d...p-how-1305456/
The key is making sure all your injectors are good, and resetting your computer fully. You can leave the battery unhooked overnight or unhook it and hold the ignition in the start position for 30 seconds or so. Mine worked immediately after install.
__________________
208K (5/26/14)
208k: 4/20/14; 207k: 2/6/14; 206k: 1/6/14;
2013: 197-205k; 2012: 191k-196k
My ZJ Injector Swap HowTo
zander21510 is offline   Reply With Quote
Unread 03-03-2013, 09:35 AM   #395
zander21510
Lord of Retro Machines
 
zander21510's Avatar
1995 ZJ 
 
Join Date: Jun 2011
Location: Dallas, TX
Posts: 1,805
Quote:
Originally Posted by torchd
I still haven't been added to the list lol.

I have the new 4.0 manifold, 703 injectors and a header. Jeep runs perfect

Sent from my iPhone using JeepForum
Added you on
__________________
208K (5/26/14)
208k: 4/20/14; 207k: 2/6/14; 206k: 1/6/14;
2013: 197-205k; 2012: 191k-196k
My ZJ Injector Swap HowTo
zander21510 is offline   Reply With Quote
Unread 03-03-2013, 09:39 AM   #396
Scopez
Registered User
1994 ZJ 
 
Join Date: Oct 2011
Location: Aiken, SC
Posts: 1,711
Quote:
Originally Posted by zander21510 View Post

The key is making sure all your injectors are good, and resetting your computer fully. You can leave the battery unhooked overnight or unhook it and hold the ignition in the start position for 30 seconds or so. Mine worked immediately after install.
So turn the key to the start position after you unhook the battery? What exactly does that do?
__________________
94 ZJ Laredo. 5.2 Crate engine. 6in JKS SA Lift. 33in Destination MTs. ARB Front Bumper.
Scopez is offline   Reply With Quote
Unread 03-03-2013, 09:48 AM   #397
zander21510
Lord of Retro Machines
 
zander21510's Avatar
1995 ZJ 
 
Join Date: Jun 2011
Location: Dallas, TX
Posts: 1,805
Quote:
Originally Posted by Scopez View Post
So turn the key to the start position after you unhook the battery? What exactly does that do?
Drains the rest of the current out of various capacitors and circuits inside your computer so it erases all its memory. It has a little grace period after you unhook the battery before it loses its memory. I'd say if you can leave it undone overnight so you know its completely dead.
__________________
208K (5/26/14)
208k: 4/20/14; 207k: 2/6/14; 206k: 1/6/14;
2013: 197-205k; 2012: 191k-196k
My ZJ Injector Swap HowTo
zander21510 is offline   Reply With Quote
Unread 03-03-2013, 09:50 AM   #398
Scopez
Registered User
1994 ZJ 
 
Join Date: Oct 2011
Location: Aiken, SC
Posts: 1,711
Quote:
Originally Posted by zander21510 View Post

Drains the rest of the current out of various capacitors and circuits inside your computer so it erases all its memory. It has a little grace period after you unhook the battery before it loses its memory. I'd say if you can leave it undone overnight so you know its completely dead.
Ah okay. I gotcha. I'll probably be ordering some new 703 injectors soon.
__________________
94 ZJ Laredo. 5.2 Crate engine. 6in JKS SA Lift. 33in Destination MTs. ARB Front Bumper.
Scopez is offline   Reply With Quote
Unread 03-03-2013, 10:06 AM   #399
RJZJ
Registered User
1993 ZJ 
 
Join Date: May 2011
Location: Robinson Creek, KY
Posts: 78
Ok just did the 703 swap on my 93 4.0 last night, idles a lil rough and runs like sh*t driving, running rich also, I saw the post about driving to give the pcm time to "learn" the new injectors. OK not a prob put 30 miles on it today and same running characteristics so far.
Here is my question/problem, Have any of you guys had a hard time starting after the swap, I have to hold the pedal down to get it to start after it sits for about 5 minutes, if I start it let it run and cut it off and start it back immediatly no problems, but after sitting it wont start right up. Any thoughts?
__________________
93 ZJ, 3.5 RC lift, 31x10.50x15, 3/4 coil spacers, bilstein 5100's, Kolak 2.5 exhaust, 703 injectors, bedliner paint job, clear front lights , Black Magic's on bumper and a pillars
RJZJ is offline   Reply With Quote
Unread 03-03-2013, 10:32 AM   #400
hrtk
Registered User
1998 ZJ 
 
Join Date: Jul 2012
Location: Canon City, Colorado
Posts: 13
Quote:
Originally Posted by RJZJ View Post
Ok just did the 703 swap on my 93 4.0 last night, idles a lil rough and runs like sh*t driving, running rich also, I saw the post about driving to give the pcm time to "learn" the new injectors. OK not a prob put 30 miles on it today and same running characteristics so far.
Here is my question/problem, Have any of you guys had a hard time starting after the swap, I have to hold the pedal down to get it to start after it sits for about 5 minutes, if I start it let it run and cut it off and start it back immediatly no problems, but after sitting it wont start right up. Any thoughts?
Did you get junkyard injectors? maybe one of the injectors is stuck open..

I put the 703s in my 5.2l, when I started the engine for the first time it was a little rough and eventually cleared itself out. I noticed a very small power gain, and smoother idle.
hrtk is offline   Reply With Quote
Unread 03-03-2013, 01:50 PM   #401
torchd
Registered User
1998 ZJ 
 
Join Date: Jan 2010
Location: Chicago
Posts: 2,351
Quote:
Originally Posted by zander21510

Added you on
About darn time lol

Sent from my iPhone using JeepForum
__________________
[b]1998 Jeep Grand Cherokee Laredo[/b]
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

[b][color=red]2002 Trans Am[/b][/color]
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
[b]420 RWHP and 382 RWHTQ[/b]
torchd is offline   Reply With Quote
Unread 03-03-2013, 02:45 PM   #402
coralman
green backs to no backs
 
coralman's Avatar
1998 ZJ 
 
Join Date: Jul 2010
Location: florida
Posts: 4,318
Quote:
Originally Posted by torchd View Post
I'll see what I can do about getting you some good pics of the front pipe!!

Sent from my iPhone using JeepForum
Thanks man, i appreciate it!
__________________
Move over bear.I'm tired of working on the jeep

Links to axle rebuilds, mount replace,a/c box rebuild,ect in history section of my profile page
coralman is online now   Reply With Quote
Unread 03-03-2013, 07:25 PM   #403
RJZJ
Registered User
1993 ZJ 
 
Join Date: May 2011
Location: Robinson Creek, KY
Posts: 78
Quote:
Originally Posted by hrtk View Post
Did you get junkyard injectors? maybe one of the injectors is stuck open..

I put the 703s in my 5.2l, when I started the engine for the first time it was a little rough and eventually cleared itself out. I noticed a very small power gain, and smoother idle.
No I bought new injectors
__________________
93 ZJ, 3.5 RC lift, 31x10.50x15, 3/4 coil spacers, bilstein 5100's, Kolak 2.5 exhaust, 703 injectors, bedliner paint job, clear front lights , Black Magic's on bumper and a pillars
RJZJ is offline   Reply With Quote
Unread 03-04-2013, 06:18 PM   #404
Primordial
Registered User
1995 ZJ 
 
Join Date: Jan 2013
Location: Goose Creek, SC
Posts: 237
Well I returned the 703s I paid too much for and got two sets of 8 injectors from another junkyard that I get better deals at...one set is of the 710 variety and the other are the blue top 24# injectors out of a 32 valve DOHC Lincoln. The blue tops are the single pintle type but can flow a bit more if I'm not mistaken. Would these be too much for the 4.0 though? With either of them I was thinking about getting a set of injector rebuild kits since some of the pintle caps have seen better shape and I figure why not freshen them up before I drop them in. What are your thoughts? Go with the 710s or the blue tops? Or go with the 710s now and the blue tops later after some mods are done?
Primordial is offline   Reply With Quote
Unread 03-04-2013, 06:52 PM   #405
Uniblurb
Web Wheeler
 
Uniblurb's Avatar
1996 ZJ 
 
Join Date: Jan 2012
Location: Central, Ohio
Posts: 3,383
Quote:
Originally Posted by zander21510 View Post
The key is making sure all your injectors are good, and resetting your computer fully. You can leave the battery unhooked overnight or unhook it and hold the ignition in the start position for 30 seconds or so. Mine worked immediately after install.
Thanks for the heads up and not sure if I left the neg cable unhooked overnight or not. Didn't know about turning the key over for 30 secs and real good tip. Regardless, the 703's are working real well now so I'm happy.
__________________
96 4.0 ZJ Laredo, 2004 4.7L WJ Limited, 93 4.0 XJ (spare), 96 4.0 XJ (son's)

-Stalling ZJ? 12 things to check before replacing a sensor; the Dirty Dozen
-Crankshaft position sensor multimeter test. & video of testing.
Uniblurb is offline   Reply With Quote
Reply

Tags
703 , 715 , ford , fuel injector , neon , swap
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.