Upgrade injectors - JeepForum.com

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post #1 of 295 Old 01-12-2010, 12:29 AM Thread Starter
drprunty
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Upgrade injectors

Ive been reading a lot on the upgrade of injectors for the 4.0 engines, using Dodge neon or mustang injectors. I have an 89 Renix xj 4.0 no mods just stock trim. Ive done searches but can seem to get a clear picture on what will fit and what wont, so far all I understand is that I should be using 19lb inj. Can someone give me that clear picture as to what years of Neons and Mustangs with compatible injectors with part numbers that I can use.? Im leaning toward the Neon injectors but any straight info would be awesome.


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post #2 of 295 Old 01-12-2010, 09:26 AM
nrpalmer32
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I purchased a rebuilt set on eBay. This is actually the set that I purchased about a year ago and installed them in late spring '09. They seem to run smoother and have a better idle. Plus its nice to get rid of the troublesome 3 piece design. I would recommend them to anyone. They are completely rebuilt and all tested.
* Fuel Injectors 19lb Design III 3 Ford Mustang TPI BMW:eBay Motors (item 280448474693 end time Jan-17-10 20:43:12 PST)


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post #3 of 295 Old 01-12-2010, 09:32 AM
leftlanetruckin
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I also run their injectors. Good value and smoothed out the idle on my junk.

Martin

1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
Western Star 4900EX 4 axle.
4.3/700r4/new frame buildup (YJ)....

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post #4 of 295 Old 01-12-2010, 09:38 AM
98muddyjeep
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you get better spray and air mixture due to the 4 holes in these injectors as compaired to the one or two holes in jeep injectors,which will give better proformance.

ah,beer the cause of and cure to all of lifes problems ...Homer J Simpson... I am the guy in the red jeep!
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post #5 of 295 Old 01-13-2010, 03:37 PM
painjectors
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Those are my injectors you're running!

Pretty much any year up to 1997 I believe had the same connector that you'll be looking for and if it's a year before 94 make sure you check the end of the injector for the four hole nozzle. You want the four hole versions of the injectors when it comes to Fords. If you go with a Dodge injector there are a couple that will fit and the Denso injectors that are in some Dodges run really well with even a single pintle nozzle. It really comes to down the model number. Ford Mustang injectors had wide spray patterns and that's what made them such good replacements. There are some 4 hole nozzles that have narrow streams, angled streams, or too wide streams.


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Full line of upgrade fuel injectors for all fuel injected Jeep models.


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phone: 407-536-4509

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post #6 of 295 Old 01-13-2010, 05:13 PM
leftlanetruckin
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Quote:
Originally Posted by painjectors View Post
Those are my injectors you're running!

Pretty much any year up to 1997 I believe had the same connector that you'll be looking for and if it's a year before 94 make sure you check the end of the injector for the four hole nozzle. You want the four hole versions of the injectors when it comes to Fords. If you go with a Dodge injector there are a couple that will fit and the Denso injectors that are in some Dodges run really well with even a single pintle nozzle. It really comes to down the model number. Ford Mustang injectors had wide spray patterns and that's what made them such good replacements. There are some 4 hole nozzles that have narrow streams, angled streams, or too wide streams.
I got a set from your website @1.5yrs ago, and love them
My junk is a 98, and they smoothed out the cosiderably.

Martin

1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
Western Star 4900EX 4 axle.
4.3/700r4/new frame buildup (YJ)....

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post #7 of 295 Old 01-13-2010, 10:55 PM
nrpalmer32
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Quote:
Originally Posted by painjectors View Post
Those are my injectors you're running!

Pretty much any year up to 1997 I believe had the same connector that you'll be looking for and if it's a year before 94 make sure you check the end of the injector for the four hole nozzle. You want the four hole versions of the injectors when it comes to Fords. If you go with a Dodge injector there are a couple that will fit and the Denso injectors that are in some Dodges run really well with even a single pintle nozzle. It really comes to down the model number. Ford Mustang injectors had wide spray patterns and that's what made them such good replacements. There are some 4 hole nozzles that have narrow streams, angled streams, or too wide streams.
Thats funny! Well hopefully you get some more business lol They are great. I am having an o-ring leak now I think but that seems normal for my Heep.


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post #8 of 295 Old 01-14-2010, 06:08 AM
cruiser54
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I just ordered a set last night at 7 PM their time for $89.95 and they have already shipped. I'm a little spooked by the factory injectors which can leak and cause an engine fire. The video posted by painjectors is kinda interesting. I'll ost back after installation and road test.
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post #9 of 295 Old 01-14-2010, 01:40 PM
painjectors
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Quote:
Originally Posted by nrpalmer32 View Post
Thats funny! Well hopefully you get some more business lol They are great. I am having an o-ring leak now I think but that seems normal for my Heep.
Sure it's an o-ring leaking?

It's very common for them to leak where the metal connector meets the metal portion of the injector body. The o-rings don't leak if you've never taken them out and caused physical damage to them.


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Full line of upgrade fuel injectors for all fuel injected Jeep models.


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phone: 407-536-4509

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post #10 of 295 Old 01-15-2010, 12:22 AM
ckisela
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Besides the idle fix do you notice any other differences after the swap?
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post #11 of 295 Old 01-15-2010, 01:38 AM
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I'm rather interested to hear on the testimonials on these injectors, after swapping out my rusty fuel tank and still curing my horrible issues, I'm leaning toward new injectors.

D.D. and wheelin' rig='89 Pioneer "Night-Train", used to be white '89 limited
I used to be XJ-NoDough (w/ 1688 posts) 'till I forgot my user name.
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post #12 of 295 Old 01-15-2010, 05:58 AM
cruiser54
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You'll get a testimonial from me as soon as I get them installed. They shipped from Florida on Tuesday evening. Could I be so fortunate to get them by the weekend? It's in the hands of the USPS now..
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post #13 of 295 Old 01-15-2010, 09:34 AM
nrpalmer32
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Quote:
Originally Posted by ckisela View Post
Besides the idle fix do you notice any other differences after the swap?
Have you ever installed a MSD Ignition box? To me, it felt about the same.....everything just seems smoother. I installed a MSD Ignition on a Honda Accord and a Bronco II, and the differences to me was that the RPM range seemed smoother, with maybe a bit more "umph". Its not like a header or anything. It should cause better ignition of the gas, some more fuel efficiency, and less leaks (hopefully)

Disclaimer: I am not saying the injectors and a MSD Ignition will give you the exact same results. lol


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post #14 of 295 Old 01-15-2010, 09:37 AM
nrpalmer32
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Quote:
Originally Posted by painjectors View Post
Sure it's an o-ring leaking?

It's very common for them to leak where the metal connector meets the metal portion of the injector body. The o-rings don't leak if you've never taken them out and caused physical damage to them.
Do you have a pic of where you are talking about? I went out to see where you were talking about and I am not quite sure. IIRC it is my #4 injector, or maybe #5.


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post #15 of 295 Old 01-15-2010, 10:12 AM
lollygagger8
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painjectors, sent you an email

96 Cherokee Sport w/ 4.0L, AW4, NP231, 4" Rough Country Lift, 31" BFG AT's
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