4 Hole Spray Fuel Injector Upgrade for Jeep 4.0 - Spray Pattern Comparison side by side

[@motorheadscottie456]

I bought injectors a long time ago from you. I did the Bosch EV4 yellow top upgrade for my 91 jeep. The yellow top injectors were from a for 5.0 mustang and had 4 hole pintles. As a kid that had no money you literally saved my fucking life dude. I can’t thank you enough.

[@Deadbuck73]

I’m thinking about this as I see cracks in my 99 XJ injectors. And I’ve read all the comments and replies to them and I love your responses. The fact you take time to reply and not be a jerk speaks volumes. One dude would have sent most people over the edge but you handled it with grace and style! Awesome so far!

[@InjectorRehab]

Thanks for your reply my friend

[@xmo552]

@@InjectorRehab Do you do diesel injectors? I have a new engine, roasted piston, ... I don't trust my local injector rebuilder.

[@InjectorRehab]

@@xmo552 No. Diesel is very specific so you need to find someone who does your specific brand. John Deere, CAT, Powerstroke, ect ect

[@xmo552]

@@InjectorRehab Thank you

[@orangek5]

mounted them yesterday on my 2000 4 door limited XJ (23 lb type), result is great!!! runs smoother, starts much better, will monitor how much mpg i get out of these.

[@foxbox2879]

How's that MPG going king ??

[@Ludofjn]

MPG update?

[@yusufalqubaisi7481]

Manufacturing say +10%

[@Juice83]

10% improvement? That's pretty decent actually, especially with smoother ride quality and starting!

[@walla2k594]

Good information thanks. Went directly to your site and ordered a set of 23# for my 99 Jeep TJ.

[@gpr2264]

Great video again!!. When you talk about 90 pounds, you mean psi?. Thanks!!!.

[@carsrcool7149]

Good vid !

[@carlospyanreyes]

For a dodge 5.9 magnum What injector upgrade do you recommend?

[@Sergio7875]

There was a reason behind using this type of spray pattern call B type , we called it pencil spray, it uses a disc orifice set up but only one discharge hole , quite a few engines used injectors with this spray pattern the main reason was a cooler combusting charge , there was plenty of 4 hole injectors available from mid 90s but engineers used B type on purpose , the Chrysler V6/V8 magnum engines (later variants) also used Bosch EV6 type injectors with this spray pattern and the engines always run well , the problem here is not the actual spray pattern but the poor quality of Siemens injector itself.

[@DumbCarGuy]

I went with brand new Bosch 23 lb 12 nozzle jectors

[@nathanmccumber8965]

How are they treating you this past years. Better mpg? What kind of jeep you got Brother.

[@Gamingdad9]

How do I know if I have the 19 or 23 lb injectors in my Jeep? Or does it matter. 2003 Jeep grand Cherokee 6 . cyln Thx James

[@InjectorRehab]

Email us if you are unsure. Be sure to include the part number stamped on the injector.

[@coilsweeper1124]

Curious, what model tester are you using?

[@abimariavargas7086]

Do it require tune ?? Or is fine without

[@InjectorRehab]

Plug and Play

[@SlappySlapperman]

Finally got my set installed, 99 WJ 251k miles, the difference in idle quality is worth it alone. I always track milage so if it improves a bit that will be a bonus. Thanks again...

[@nathanmccumber8965]

How is it holding up ?

[@SlappySlapperman]

Currently sitting at 254k miles, milage improved a tick but it's always been up and down, city driving is always bad. But still worth every penny, the Jeep is a 4.0l, got the 23 lbs injectors.

[@nathanmccumber8965]

@@SlappySlapperman i love my xj 98

[@trevorworobel5184]

could this end up meaning better fuel economy?

[@InjectorRehab]

Yes

[@bobs74xlch]

I'm interested in new injectors for my 97 Wrangler but someone did an engine swap at some point and I'm not certain what year engine it is. Anyhow, is there away to identify the injectors that are currently in my jeep?

[@InjectorRehab]

Yep, contact through our website injector-rehab.com

[@benburg436]

So oil pump bypass spring stuck open on this one, and oil pump bypass stuck shut on the one that over pressures the lifters?¿??

[@holton345]

WTF are you on about? You sound like a crackhead mumbling to himself.

[@xxjoseneilxx]

does it save fuel? These work for a 4.0 98?¨

[@InjectorRehab]

Mpg, not a significant amount. Yes we have for 98 on website. Search "jeep"

[@xxjoseneilxx]

@@InjectorRehab They only come out 99 and up

[@InjectorRehab]

​@@xxjoseneilxxIDK what you searched, but the definitely are on there. Not only are they on there, there is also a link to pre-99 in the description of this video. injector-rehab.com/product/87-98-jeep-4-0-upgrade-19lb-set-6-copy/

[@xxjoseneilxx]

9 pero que diferencia tienen de 19 a 23

[@xxjoseneilxx]

but what difference do they have from 19 to 23

[@surfer103]

Would you recommend the 19 lbs injectors for a Jeep 4.0 6l engine?

[@InjectorRehab]

See our other videos

[@austonsosebee7530]

Is the 19 pound or 23 pound better for 0-60 times

[@InjectorRehab]

If you have other mods go 23

[@austonsosebee7530]

@@InjectorRehab so if everything with my 4.0 engine is stock should I buy the 19 pound

[@steazemonster80216]

Whats the part/sku # for the 2 different types of injectors

[@InjectorRehab]

Type the word "Jeep" into the search bar on the site... Or, use the links in the description

[@landonmitchell8315]

Will the 23 lb work for a 91 4.0

[@InjectorRehab]

Electrical connectors will need to be changed

[@officialWWM]

Hi, do you ship to Australia?

[@InjectorRehab]

Yes

[@officialWWM]

@@InjectorRehab awesome, thanks. I’ll order from your website.

[@garrett_1857]

Just curious how do i know what lb injectors i need 96 4.0 stock other than a throttle body spacer?

[@InjectorRehab]

23lb

[@toddrhine7648]

Hi there, was just curious if you sell injectors for my (FEB)1993 ZJ I6 4.0? I'm assuming that everything is still stock as in injectors also. It has just over 200k on it. I would like to upgrade to the 4 hole. If you do sell them for my application, can you tell me if their new or rebuilt (cleaned, etc.) & what type of injector and description about them? Thx much for your time & info..

[@InjectorRehab]

Yep. Contact through our website. Thanks

[@texture6]

With a 2000 Jeep XJ what the difference between 19lb and 23lb injector or it does not matter?

[@InjectorRehab]

23lb allows more room for HP making upgrades like air intake ect

[@JeepTJWheelin]

Do you have a link for these 4 hole injectors for a 2005 Jeep TJ Rocky Mtn 4.0?

[@InjectorRehab]

On 05 they already have a four hole ev14 injector.

[@krod2162]

Living in California. I would be really concerned about being able to pass smog. With these things on there, they're obviously brightly. Colored a smog tech will notice them for sure i have a 93wrangler YJ with a 2.5 l in line 4.

[@InjectorRehab]

Sucks that you have to deal with that.

[@wr3add]

Neato

[@orangek5]

do they come with all new o-rings ? is there any gain in hp with these maybe?

[@InjectorRehab]

Yes they have new o-rings. As with any application, changing injectors is not going to add horsepower. It may allow you to make more horsepower but simply changing injectors does not add horsepower

[@Hoo76-cash]

Looking for injectors for a 98 Jeep Wrangler 4.0. The website started at 99 models for the performance injectors. Will these work?

[@InjectorRehab]

Probably best to ask questions like that directly to us through our website. There are definitely 98 versions on there. But yes you could use 99 plus with adapters also found on the website. But again contact us through the website

[@ec0084]

I have 2006 wrangler 4.0 l 19 or 23 lb which is better / only has k&n filter upgrade

[@InjectorRehab]

23

[@ec0084]

@@InjectorRehabok thank you for answering so quick are they new injectors or reman ????

[@InjectorRehab]

@@ec0084 reman

[@ec0084]

@@InjectorRehab ok thank you 👍👍

[@josephmontano1447]

Do you have to upgrade the MAF when going to the 23lb injectors?

[@InjectorRehab]

No

[@smansmanman]

@injectorrehab What brand & part number are the 23psi injectors you used in the video so I can purchase 6?

[@InjectorRehab]

There is a link in the description to them. They are Bosch injector-rehab.com/product/99-04-jeep-4-0-upgrade-set-6/

[@smansmanman]

Do you have new connectors for the injectors too, mine will end up breaking by the looks of it?

[@InjectorRehab]

@@smansmanman yes. Go to the website and go to the connectors section.

[@smansmanman]

Can you post to Melbourne Australia?

[@InjectorRehab]

@@smansmanman yes

[@TxHylyner]

@injectorrehab would you recommend the 4 hole over the 12 hole option? Have plans for high flow intake and exhaust.

[@InjectorRehab]

Which 12 hole option

[@TxHylyner]

@@InjectorRehab already ordered your 23lb 4 holes so doesn’t really matter now, I’ve just seen some 4 and 12 hole options available from Ksuspensions and was curious if you had done any testing on 12 hole variants vs 4. Will be installing in 04 4.0 jeep.

[@crossfirecat3594]

Do you offer a 4 hole injector for 05-06 Jeep 4.0?

[@InjectorRehab]

That's what they are from the manufacturer

[@crossfirecat3594]

@@InjectorRehab That’s odd. My 06 has single pintle injectors. Possibly because it is a right hand drive model? It may also be possible the previous owner had replaced them with the incorrect injectors.

[@wesleylafoon9767]

can you explain for me the added value of the increased pressure injectors, I would guess that you get a better burn or combustion consumption of your fuel which would mean more on demand power, what I'm wondering really is does this mean you will see an increase in fuel economy?

[@InjectorRehab]

Not sure where fuel pressure question is coming from. I don't believe we even mentioned pressure in this video.

[@cajunwoodworker5231]

@@InjectorRehab well, at the 1.15 minute mark you talk about the 23 pound versus 19 pound, I guess that what Wesley was asking about

[@InjectorRehab]

@@cajunwoodworker5231 that is referring to the size of the Injectors. Injectors are rated at either a lb/hr rating or cc/min. Have a look on our website under the knowledgeable section. There is so much information there. You can spend hours learning about fuel injectors.

[@tripleseven8361]

Yeah…The implication was pounds of pressure, i.e. 23 psi…If not psi, to what does the 23 pound refer to?

[@kowen8121]

@@tripleseven8361 It is not PSI. It is lbs per hour flow rate.

[@Meatpopsicle2050]

I tried to email through your website but it said there was an error and to contact later. I’m looking for a link for a set of these for my wrangler 2004 TJ Sport 4.0.

[@InjectorRehab]

Check the description of the video or type "jeep" in the search bar of our website

[@Meatpopsicle2050]

@@InjectorRehab found the search bar and found them. I’m unsure as to what pound I need. Is there a way for me to determine this?

[@InjectorRehab]

@@Meatpopsicle2050 go with 23lb if you are doing any upgrades like air intake

[@Meatpopsicle2050]

@@InjectorRehab ok, I have a cold air intake installed currently so I’ll go with that. Thx.

[@Jboost412]

@@InjectorRehab I was going to ask a similar question about the Jeep injectors as far as what flow rate to buy the 19lb flow rate or 23lb my Jeeps a 99 off road setup I’m working on upgrading spark & fuel delivery for reliability more then performance I guess you could say though performance increases are absolutely welcome 😆 I don’t have the cats my muffler is a flow master & I guess you could say it has a cai since the factory air box is gone & everything is replaced with a snorkel setup so I don’t suck in water which I guess is a version of a cold air setup since I’m definitely not sucking in hot engine air any longer I’m going to say the 23lb 4-hole injectors are probably what I would want to buy correct? Eventually I’ll add a 62mm throttle body for some additional air in to go along with the head intake & exhaust that was all cleaned up & gasket matched as well for a little extra help in the performance department

[@jimnewton5904]

Local know it all told me you cannot just change these without a complete retune.... sent him this video....

[@InjectorRehab]

@@jimnewton5904 well 10's of thousands of people over the years are defying his rules. 😂

[@lh1678]

will this work with 96 4.0?

[@InjectorRehab]

Yes we do have an upgrade for them. Contact through the website.

[@nathanmccumber8965]

​@@InjectorRehablink for 98 xj classic.

[@InjectorRehab]

@@nathanmccumber8965 contact through website if you don't like the links already provided in the description

[@nathanmccumber8965]

@@InjectorRehab I found them thank you. Quick question can I use 23lb over 19lb or since it 98 it need to be 19lb?

[@InjectorRehab]

@@nathanmccumber8965 You can use 23. You're just going to need different electrical connectors. Yes, they're on our website if you use the search button . If you want to continue talking about it, contact us through a website. We don't use KZbin as a form of communication.

[@Eric2300jeep]

I guess I just don't understand how fuel atomization works... because from this video, it clearly looks the opposite of what you say... The factory injectors are misting evenly throughout the cylindrical chamber, while with the others you can clearly see the "stream" of fuel. Could you please explain why this is so?

[@InjectorRehab]

I believe you have what you believe to be the original mixed up. The factory jeep spray a straight solid stream. No "misting".

[@ej9147]

Your website is something less than helpful, the search link opens up with everything crammed into one screen and overlaid......

[@InjectorRehab]

Sounds like a cache issue. Try a different browser or incognito mode

[@ej9147]

@@InjectorRehab nope, I will go someplace else that actually has customer service, fix your web site!

[@InjectorRehab]

@@ej9147 lol ok

[@ej9147]

@@InjectorRehab My point made!

[@InjectorRehab]

@@ej9147 Still on this? For someone who leaves a negative comment complaining that their browser is displaying the site wrong rather than asking the question they needed the answer to... you're correct, we didn't answer your question. You never asked it. We addressed what you did bring up, the site not displaying correctly. You never called. Never reached out via any other social media accounts we have. Customer is always right, right? Not here. Sorry. Please keep your promise by taking your business elsewhere. Have a great day EJ 👍