More budget injector upgrade questions
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
im so confused so the injectors from a brigs and stratton 3.5 horse weed blower will work on my 220 volt 3 phase swimming pool pumpas long as its the 6th sunday of the month
Last edited by freegdr; Oct 12, 2010 at 02:20 AM.
Member
Joined: Mar 2010
Posts: 202
Likes: 0
From: Virginia Beach
Year: 1991
Model: Cherokee
Engine: 1998 4.0 242
Haha this is insane i just wanna know if i can put 93 cobra blue top injectors on my 91 jeep with a motor that is all from a 98 grand cherokee except the head is from a 95 cherokee??????? Oh and the fuel rail is still the 91 one. And what would this do to my jeep? Thanks.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
some wher about 200 messages back therewas a chart ive been following this post but it goes back and forth to much for me
Haha this is insane i just wanna know if i can put 93 cobra blue top injectors on my 91 jeep with a motor that is all from a 98 grand cherokee except the head is from a 95 cherokee??????? Oh and the fuel rail is still the 91 one. And what would this do to my jeep? Thanks.
it so much about being lean at wot, more like with 703 @39 psi it will be a little bit rich at WOT @49 psi it will be a even more rich.
Last edited by rainman; Oct 13, 2010 at 01:00 AM.
What about changing the pintle cap as well? It a plastic that deteriorate of age and heat, you don't want it to break inside the manifold.
Most of 99 Jeep came with Jetronic connectors, but since it was a transition year a few came with USCAR connectors. 0280155784 will be a perfect fit to your Jeep.
You have USCAR connectors, your current injectors supply 234cc/min so the right injectors for your Jeep will be 0280155784 (Chrysler part #4669938) which flow 238cc/min and have USCAR connector.
You can find it off eBay for $50 for three sets of 4. Here, here and here.
Another alternative for the 99-up 4.0L is Ford xr3z-a4b (CM4956) which is the newest design and offer even better performance.
You can get 6 NEW injectors for $60 here.

Most of 99 Jeep came with Jetronic connectors, but since it was a transition year a few came with USCAR connectors. 0280155784 will be a perfect fit to your Jeep.
You have USCAR connectors, your current injectors supply 234cc/min so the right injectors for your Jeep will be 0280155784 (Chrysler part #4669938) which flow 238cc/min and have USCAR connector.
You can find it off eBay for $50 for three sets of 4. Here, here and here.
Another alternative for the 99-up 4.0L is Ford xr3z-a4b (CM4956) which is the newest design and offer even better performance.
You can get 6 NEW injectors for $60 here.

Seasoned Member
Joined: Aug 2010
Posts: 358
Likes: 3
From: Illinois
Year: 1999
Model: Cherokee
Engine: 4.0
Please help.. I have a 2001 stock 4.0L.. I know the 784's arae good BUT these xr3z-a4b are NEW and the guys store is a 1/2 mile from my house and he said i can pick them up! for some reason NO ONE ON HERE USES OR HAS SHOW UN THEY used them..?? I also see no clip for the bottom of the injector? Does the 2001 Injector setup need a lower AND upper clip? Im doing this upgrade so I want to buy these but i dont want them hanigng in the port holes loose! Anyone out here ever use these?? They are $60 new!! Yet no one with a 2000 or 2001 has used them with any success on here? How about "TheKevin".. he bought them got to point of install and we nver heard from him again.. The store is right down the road from my house too.. Help.. anyone use the xr3z-a4b with any sucess?
You will never find the answer anyplace on the entire internet.. I ave been looking for days on end.. Not one person has said they tried the XR's and said they worked. I live a 1/2 mile froom the store in Ronkonkoma NY that sells them NEW for 60 bucks too.. They said I can pick them up as well.. I just dont wanna do the work twice if they suck or need two sets of clips?
Please help.. I have a 2001 stock 4.0L.. I know the 784's arae good BUT these xr3z-a4b are NEW and the guys store is a 1/2 mile from my house and he said i can pick them up! for some reason NO ONE ON HERE USES OR HAS SHOW UN THEY used them..?? I also see no clip for the bottom of the injector? Does the 2001 Injector setup need a lower AND upper clip? Im doing this upgrade so I want to buy these but i dont want them hanigng in the port holes loose! Anyone out here ever use these?? They are $60 new!! Yet no one with a 2000 or 2001 has used them with any success on here? How about "TheKevin".. he bought them got to point of install and we nver heard from him again.. The store is right down the road from my house too.. Help.. anyone use the xr3z-a4b with any sucess?

Ill be sure to tell everyone how they work
thanks.. I just cant figure why for 60 bucks a set,, current LIVE auction on ebay at 59.99 + 7.95 shippin for BRAND NEW.. no one is buying them?? Im sceptical as to why.. and why anyone here would buy 784's with that post by Rainman stating these New Single hole types are ever better then the 4 Hole neon types.. Yet no one has used it on here!! ??
thanks.. I just cant figure why for 60 bucks a set,, current LIVE auction on ebay at 59.99 + 7.95 shippin for BRAND NEW.. no one is buying them?? Im sceptical as to why.. and why anyone here would buy 784's with that post by Rainman stating these New Single hole types are ever better then the 4 Hole neon types.. Yet no one has used it on here!! ??
for my 2001 Cherokee 4.0L
I DID NOT REMOVE FUEL RAIL
THESE INJECTORS DO NOT USE THE STOCK CLIPNUTS
I completed the job in 1.5 hours start to finish. A monkey with a screwdriver and a pliers could do this job. I DID NOT remove the fuel line from the fuel rail. I was able to rotate the rail a bit upward while connected to fuel line and I removed and installed the new injectors.
The truck runs smoother at idle. Its quick as all hell but it was before as well since I ran that seafoam crap.. That stuff works man!
Anyway, I see very little difference.. At least they work and apparently according to that post at http://www.ausjeepoffroad.com/forum/...ad.php?t=92236 they are the best ones.
I can assure you they work for my 2001 without clipnuts and its an easy job!! DO IT!! You can buy them on the company website as well for 60.00!! Look em up on eBay..
This is an injector without clip nut, compare to the above picture:

Here is a complete list for the 0280155703, 2.0L or 2.4L:
CHRYSLER CIRRUS LX (1995 - 1997)
CHRYSLER CIRRUS LXI 1997
CHRYSLER SEBRING JX (1996 - 1997)
CHRYSLER SEBRING JXI 1997
DODGE CARAVAN (1996 - 1997)
DODGE CARAVAN SE (1996 - 1997)
DODGE GRAND CARAVAN (1996 - 1997)
DODGE GRAND CARAVAN SE (1996 - 1997)
DODGE NEON (1995 - 1997)
DODGE NEON HIGHLINE (1995 - 1997)
DODGE NEON SPORT (1995 - 1997)
DODGE STRATUS (1995 - 1997)
DODGE STRATUS ES (1995 - 1997)
PLYMOUTH BREEZE 1996
PLYMOUTH GRAND VOYAGER (1996 - 1997)
PLYMOUTH GRAND VOYAGER SE (1996 - 1997)
PLYMOUTH NEON (1995 - 1997)
PLYMOUTH NEON HIGHLINE (1995 - 1997)
PLYMOUTH NEON SPORT 1995
PLYMOUTH VOYAGER (1996 - 1997)
PLYMOUTH VOYAGER SE (1996 - 1997)

Here is a complete list for the 0280155703, 2.0L or 2.4L:
CHRYSLER CIRRUS LX (1995 - 1997)
CHRYSLER CIRRUS LXI 1997
CHRYSLER SEBRING JX (1996 - 1997)
CHRYSLER SEBRING JXI 1997
DODGE CARAVAN (1996 - 1997)
DODGE CARAVAN SE (1996 - 1997)
DODGE GRAND CARAVAN (1996 - 1997)
DODGE GRAND CARAVAN SE (1996 - 1997)
DODGE NEON (1995 - 1997)
DODGE NEON HIGHLINE (1995 - 1997)
DODGE NEON SPORT (1995 - 1997)
DODGE STRATUS (1995 - 1997)
DODGE STRATUS ES (1995 - 1997)
PLYMOUTH BREEZE 1996
PLYMOUTH GRAND VOYAGER (1996 - 1997)
PLYMOUTH GRAND VOYAGER SE (1996 - 1997)
PLYMOUTH NEON (1995 - 1997)
PLYMOUTH NEON HIGHLINE (1995 - 1997)
PLYMOUTH NEON SPORT 1995
PLYMOUTH VOYAGER (1996 - 1997)
PLYMOUTH VOYAGER SE (1996 - 1997)
Seasoned Member
Joined: Aug 2010
Posts: 358
Likes: 3
From: Illinois
Year: 1999
Model: Cherokee
Engine: 4.0
I just installed 784's in my '99 XJ 4.0 and am noticing that my exhaust pipe is black. I suspect that it's running rich. How long does it normally take for the computer to reset fuel trim?
I also have new injectors and they are doing worse on gas.. how do i tell if it running lean or rich? What is the test.. My old injectors for my 2001 were cleaned prefessionally last year by the dealer according to the guy I bought the truck from.. They run better then the Brand New Fords I got CM4956..
Anyway how to tell if rich? I suspect this is rich


