Fuel Injector plug sequence??
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 49
Likes: 1
From: Reno, NV
Year: 1999
Model: Cherokee
Engine: i6 4.0
99 sport with the 4.0
i spent the weekend getting my old cracked manifold replaced with a header i got off ebay.
Well in my excitement to put get the header on i didnt mark my fuel injector plugs. I've been searching all over and cant seem to find a single answer for the order the plugs go in.
i found a diagram for the plugs on and older jeep, but my plugs seem to be different colors the ones in the diagram.
So my question is; does anyone have a diagram for the fuel injector plugs? or can anyone tell me the order by color???????
i spent the weekend getting my old cracked manifold replaced with a header i got off ebay.
Well in my excitement to put get the header on i didnt mark my fuel injector plugs. I've been searching all over and cant seem to find a single answer for the order the plugs go in.
i found a diagram for the plugs on and older jeep, but my plugs seem to be different colors the ones in the diagram.
So my question is; does anyone have a diagram for the fuel injector plugs? or can anyone tell me the order by color???????
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Here ARE the older order, if you want to double check what you found.
.................................................. .................................................. .......
LITTLE BALL, LONG GREEN, TEE YOUR WHITE BALL.................................................. ..........
Light Blue, Light Green, , Tan, Yellow, White, then Black are the injector color codes.
.................................................. .................................................. .......
LITTLE BALL, LONG GREEN, TEE YOUR WHITE BALL.................................................. ..........
Light Blue, Light Green, , Tan, Yellow, White, then Black are the injector color codes.
Last edited by DFlintstone; Nov 26, 2013 at 04:01 AM.
Thread Starter
Junior Member
Joined: Mar 2012
Posts: 49
Likes: 1
From: Reno, NV
Year: 1999
Model: Cherokee
Engine: i6 4.0
And is that from front to back?
that matches the little bit of info ive been able to find.
im asking because the wires on my jeep aren't all the same color as the ones you said or the ones in the picture ive found.
Or im not sure how to read the picture haha
http://0.tqn.com/d/autorepair/1/0/S/a/42225854.gif
that matches the little bit of info ive been able to find.
im asking because the wires on my jeep aren't all the same color as the ones you said or the ones in the picture ive found.
Or im not sure how to read the picture haha
http://0.tqn.com/d/autorepair/1/0/S/a/42225854.gif
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Those schematics above are not for a '99 4.0.
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Those schematics above are not for a '99 4.0.
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black
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Thread Starter
Junior Member
Joined: Mar 2012
Posts: 49
Likes: 1
From: Reno, NV
Year: 1999
Model: Cherokee
Engine: i6 4.0
Those schematics above are not for a '99 4.0.
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black
#1 injector is in the front (radiator end) of the intake manifold.
All injectors will have a 12 volt power source to them, using the same color code wires: Dark Green/Organge tracer stripe.
Each injector will have different color coded wire for its ground circuit. They are:
#1 White/Dark Blue
#2 Tan
#3 Yellow/White
#4 Light Blue/Brown
#5 Pink/Black
#6 Light Green/Black

but this worked!
the colors you gave me matched and my first 2 plugs were backwards.
Thanks very much!!
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5

My nearly limitless mental genius is somewhat taxed at the moment. Tomorrow is another day. I'm not worried a bit! (the 9th round is mine!)
And thanks Ken.
Last edited by DFlintstone; Nov 26, 2013 at 01:04 AM.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Tough one.
Wild Bill while Tanning Yellow and White tailed deer, saw the Blue sky but needed to stop and "pinch a loaf". ........OK, genius might take time...
Help! How do you put Brown after blue sky? (with pink/black and light green/black after).....
Wild Bill while Tanning Yellow and White tailed deer, saw the Blue sky but needed to stop and "pinch a loaf". ........OK, genius might take time...
Help! How do you put Brown after blue sky? (with pink/black and light green/black after).....
Last edited by DFlintstone; Nov 26, 2013 at 04:40 AM.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Okay, so I have no use for golf.
Is that politically correct?
The Politically Correct folks are trying to convince us that you can pick up a turd by the clean end.......
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
OK...the challenge is ON If somebody can come up with something better than my "Golf Crap" for this, I'm ready! Bring it on! 
My nearly limitless mental genius is somewhat taxed at the moment. Tomorrow is another day. I'm not worried a bit! (the 9th round is mine!)
And thanks Ken.

My nearly limitless mental genius is somewhat taxed at the moment. Tomorrow is another day. I'm not worried a bit! (the 9th round is mine!)
And thanks Ken.
The fuse number in the PDC changed from F20 in '97 to F21 in '98? (don't have '98 diagrams).
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