Injector Swap Writeup for the 4.0L - Page 3 - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > Injector Swap Writeup for the 4.0L

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Unread 12-25-2011, 09:49 AM   #31
d50
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cool thanks. also how do you test them? i know about clicking them on 12v but is there an ohm reading or something else?

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Unread 12-25-2011, 09:56 AM   #32
dukie564
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12.0 to 12.5 ohms
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
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http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 12-25-2011, 05:36 PM   #33
NJXJ91
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Any improvement on MPG?
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Unread 12-25-2011, 08:43 PM   #34
RedRyderXJ
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Quote:
Originally Posted by NJXJ91
Any improvement on MPG?
Most people haven't noticed any difference but a handful say that they did. Good increase in idle and response though and its easy to do
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Unread 12-26-2011, 10:38 AM   #35
dukie564
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Originally Posted by RedRyderXJ View Post
Most people haven't noticed any difference but a handful say that they did. Good increase in idle and response though and its easy to do
a little - but that mainly can be attributed to dirty injectors being swapped out for clean ones
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1995 XJ Cherokee Sport
4.5" Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked)
33x12.5 Mickey Thompson Baja MTZ Tires, 283,000 mi and runnin' strong
http://www.jeepforum.com/forum/f22/project-danger-cart-xj-1297118/
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Unread 12-27-2011, 10:29 PM   #36
RedRyderXJ
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Quote:
Originally Posted by dukie564

a little - but that mainly can be attributed to dirty injectors being swapped out for clean ones
That could be true. When I changed mine I only had 2 that where bad, 1 of them I'm surprised was even putting fuel out. My mileage didn't really move but I understand what you mean that makes sense
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Unread 01-02-2012, 10:18 AM   #37
Rocklobster
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Subscribed for reference thanks for the great write up
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Unread 02-01-2012, 11:57 AM   #38
DieselDreamer
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Where do you get a rebuild kit for the injectors and how much do they run? If I can do this all for under $100 bucks it is a steal!

Erik
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Unread 02-01-2012, 12:38 PM   #39
Rocklobster
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You might get rebiulds for that
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Unread 02-01-2012, 07:36 PM   #40
MilanJeep
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You do not need to reset the PCM. Just swap the injectors and go. I have done this on 3 Jeeps now. Resetting the PCM does nothing, it will learn your fuel trims really quickly as you drive anyway.
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Unread 02-01-2012, 08:33 PM   #41
RedRyderXJ
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Quote:
Originally Posted by MilanJeep View Post
You do not need to reset the PCM. Just swap the injectors and go. I have done this on 3 Jeeps now. Resetting the PCM does nothing, it will learn your fuel trims really quickly as you drive anyway.
Keep in mind its not instantaneous though, it take about 50 starts for everything to get ironed out and running smoothly
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Unread 02-16-2012, 09:41 AM   #42
bigislandhikers
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Im getting ready to do this. Great write up and I really appreciate the pics!!
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Unread 02-16-2012, 10:36 AM   #43
wsar10
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Originally Posted by Rocklobster View Post
Subscribed for reference thanks for the great write up
me too !!
Iv been tossing this around in my head....
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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Unread 02-16-2012, 10:57 AM   #44
wsar10
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so whats the diff. between 703's and 784's ?
What do I need ? (93 5spd)
what kind of pricing are we talking for this mod ??

Can I rebuild my OE injectors with a 4 hole parts kit ??

sorry I'm quite ignorant to fuel system workings........
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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Unread 02-16-2012, 11:01 AM   #45
bigislandhikers
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Im replacing mine becasue they are leaking.
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