JEEP 4.0 FUEL INJECTOR UPGRADE | HOW TO & TIPS

[@kyrangerman519]

I'm glad you didn't use Vaseline like a lot of youtubers use, it degrades the rubber. Nice job!

[@BigFrogs4x4]

Oh no. This or engine assembly lube.

[@allanwagner4570]

Well the o rings are silicone, so it doesn’t really matter what you use as long as youLube a little bit

[@glennhassig6668]

You are a great instructor! Buying an 1997 TJ never fixed a thing on a car before wish me luck

[@BigFrogs4x4]

Thank you. Just be careful with the seals. And make sure all holes are clean. Even the slightest cut or air leak can cause the engine to run bad. Check each seal close before installing because today's parts don't have very good quality checking. Many times at my job we get bad brand new parts

[@kevinm.n.5158]

Hope it went well you probably learned a lot by now

[@surfer103]

Great job. Loved the way you explained every step of the process. Thank you for that.

[@BigFrogs4x4]

I'm glad i could help

[@sixsixpks]

Excellent video. I'm going to do this now.

[@BigFrogs4x4]

Have fun

[@hilifesawmper4775]

Is there any thing u have to do to the ecm some say to unhook the battery and put the to leads to gether for a minute I don't know just seeing if u heard anything about that

[@hilifesawmper4775]

Also good job on the videos

[@BigFrogs4x4]

I did not do that. I've installed three sets of these and three separate Cherokee 4.0. None of them have had any issues. The only thing I've noticed is a little bit quicker throttle response.

[@BigFrogs4x4]

And thank you. I tried to get detailed whenever possible

[@Jboost412]

Nice video! Just came across it while looking up some ways to add a little extra pep & reliability to our trail rigs….one thing I figured I would mention is you can get the injectors out if you have to without popping off the fuel line….we’ve had some single hole stock injectors fail trail side over the years so while not ideal you can do it

[@BigFrogs4x4]

Yes you can. Just makes it a little easier to work and film it. Thanks for the info and the complement. Much appreciated!

[@carlosdelarionda2715]

Great job showing us how to do a 4.0 fuel injector upgrade however the product you showed its sold out. Any other brand you suggest ???

[@BigFrogs4x4]

I'd recommend staying away from no name ones from Amazon. I've seen those fail. My eBay ones have been good. I've been told dodge neon ones fit but I don't know for sure. If you search eBay check reviews and warranties.

[@BigFrogs4x4]

There are name brands but they will be more expensive.

[@seansullivan3795]

Good video. Thanks for taking the time to make it.

[@BigFrogs4x4]

Glad I can help.

[@immelting9834]

Very informative video . This video came in handy for doing mine . Thanks man 👍🏿

[@BigFrogs4x4]

Very glad I could help!

[@SadbutTrue84]

Nice, detailed video👏! Thanks for the safety tips😎👍! Ecspecially sense it involves working with gas🤪🔥! I was installing a fuel pump once. Watched dozens of videos trying to figure out the best way to release pressure from the fuel line; none of the videos showed me how to properly do this and I ended up getting a face full of gas after dissconneting a line!😒! So again; the safety tips are very much appreciated👍! Thanks.😂.

[@BigFrogs4x4]

We learn from our mistakes. I've had my share of fuel, oils and greases all over me. Never a good way to start a job.

[@jat-justamaturetech-philpj8285]

You didn't reset the PCM for the new 4 hole injectors??

[@BigFrogs4x4]

No. They are stock psi, just have a more fuel efficient spray pattern

[@jasonfinley5115]

The injectors you have a link with Amazon, are those the same you got from Ebay? Any update? The 99 still running smooth?

[@BigFrogs4x4]

They are not the same company. But both 4 hole injectors. At least I'm pretty sure. Sometimes Amazon sellers change things. I have them in my 2001, my daughters 1999 and my friend just put them in his 2000. All running well. The biggest difference was throttle response. Mpg went up maybe .5 mpg. Haven't had it on the highway for long distance yet to see a real change in mpg. But idle and throttle response is better.

[@toddrhine7648]

Hey, awesome video! Hopefully you can answer this ? I have a 93' Jeep Grand Cherokee Laredo I6 4.0 and needing the correct fuel pressure rating at the rail. Went to different suppliers for an upgraded 4 port injectors and all were different fuel pressure ratings! Also I would like to get the Bosch brand (new or rebuilt) and not a knockoff ! If you could help it would be greatly appreciated. PS: No one else has helped me in this manner. Thx much.

[@BigFrogs4x4]

I don't know it off the top of my head but I can see what I can find.

[@toddrhine7648]

@@BigFrogs4x4 Thank you so much. I would really appreciate it. When it comes to the injectors it seems they just try to push an injector that they have in stock/or can simply order.

[@BigFrogs4x4]

I got mine on ebay if I remember correctly. My friend bought on Amazon and he had 1 fail less than 1k miles.

[@BigFrogs4x4]

From what I'm finding, 37-41psi on stock fuel pump

[@toddrhine7648]

@@BigFrogs4x4 Thx so much. I had ordered a set off of Ebay once and they were a Chinese knockoff of Bosh and in a Bosch box. Tried them and spray patterns were terrible. Then ordered some off of Amazon and 2 bad injectors! So I just don't trust them anymore. I rather pay more for someone trustworthy that give me all the info on their injectors that I need!!! PS: And not injectors that are the wrong ones for my application.

[@Gamingdad9]

Should have done the video without that background music

[@BigFrogs4x4]

I've since learned and don't use any anymore. Thanks.

[@pinkfloyd1116]

Will this help fix gas in the oil? I have an 03 and the oil smells a bit like gas. The oil levels are fine, runs, and idles fine, no codes. Thanks for the help.

[@BigFrogs4x4]

If you can pull the spark plugs and look into a cylinders with a camera after the engine has sat for a while (over night) you should be able to see if gas is leaking out of an injector into the cyl. If it is it can run past the piston rings into the fuel. Does it take a little longer to start?

[@pinkfloyd1116]

@@BigFrogs4x4 No it starts up normal. They're the stock injectors so it wouldn't hurt to replace them anyways. I just hit 160k.

[@BigFrogs4x4]

It sounds like you may have an injector slowly leaking into a cyl. But had to tell over the internet. Lol

[@pinkfloyd1116]

@@BigFrogs4x4 Yeah that's what I was thinking. Well thanks for your input nonetheless 👍🏻

[@jrfsailing07]

Great Video...Thank you VERY Much!!

[@BigFrogs4x4]

Hope it helps

[@DL-by8el]

I would remove the music nex time great video

[@JeepTJWheelin]

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

[@BigFrogs4x4]

They can be found on Amazon and Ebay. Check the listing before ordering to make sure it fits. amzn.to/3x4xEcY

[@JeepTJWheelin]

@@BigFrogs4x4 Don't think these are for an '05 TJ Rocky Mtn and these have horrible reviews. But so do the Bosch remanufactured injectors. I use 4 - 6 oz. of MMO at each fill up and so far this 145k mile 4.0 TJ is running good, with a smooth idle most of the time. TJ gurus like Jerry Bransford say stick with oem 1hole injectors. Maybe I will and continue using MMO.

[@mrscano76]

Hi there any ideas did upgrade due to a misfire and several injector errors fixed 2 but p002 code keeps popping up. swaped twice now for a new one still p002. Help!

[@BigFrogs4x4]

What year? Which vehicle is it? Wrangler or Cherokee

[@BigFrogs4x4]

Are you sure thats the correct code?

[@mrscano76]

It's a 2002 grand cherokee

[@BigFrogs4x4]

@@mrscano76 I could not find that code in any system. I think you are missing a #. Are you sure all the injector o rings seated well? The holes and everything was clean when installing? If you can get me another code I may be able to help more.

[@Spinonemaster]

Nicely done video BF ... but, yea, maybe loose the music .... although there are lots of 4 hole after market FI's, most people recommend the getting the quality Bosch 4 hole rebuilds at around $60 on ebay or amazon ... rumors are the cheaper chinese ones fail quickly ... also liked you stressing cleaning FI ports and gas connector (and purging the air out of the rail before you reinstall) no sense in risking clogging a new injector ... as for performance, having driven 2 cherokees with 4.0's for 600k miles in 40 years, the 4.0 will never get great MPG, but I love that cast iron 1940's AMC design ... and any MPH increase helps ... smoother idle, better throttle response is nice .... after testing throttle response while driving, remember it takes a while for the computer to adjust and learn to the new FI's ... MPG will most likely improve after it resets over a few hundred miles

[@BigFrogs4x4]

Thanks

[@ShadesofCozenedIndigo]

Running into the cheap injectors leaking on me, will try those Bosch rebuilds, Thanks!

[@BigFrogs4x4]

Thanks.

[@BUKWulfSh0t]

I'm kinda scared to order off Ebay or Amazon... any update?

[@BigFrogs4x4]

I haven't had a problem. But do some research, but I THINK I read somewhere that dodge neon injectors will work as well. My friend did have trouble with a set from Amazon.

[@BUKWulfSh0t]

@@BigFrogs4x4 thanks!

[@BigFrogs4x4]

@zackariadelaserna8284 no problem. Good luck

[@arnoldkujani3253]

Hey man, do u know what the fuel injectors are from? Or a Bosch part number

[@BigFrogs4x4]

I ordered off of ebay but they are on Amazon too. I know dodge neon injectors work but I don't remember what year to use.

[@arnoldkujani3253]

@@BigFrogs4x4 thanks I just ordered some off eBay aswell, I was surprised it was $100 for all 6 shiped to Canada

[@BigFrogs4x4]

Hope it all goes well

[@josephyeager5624]

Was this a direct swap? Did you have to advance timing or do any tuning?

[@BigFrogs4x4]

Nope direct swap. It's the same fuel pressure just a more spread finer mist for a better burn

[@josephyeager5624]

@@BigFrogs4x4 I must have got a bad batch or something, I did this in mine and it misfires and is running very very rich, smokes a lot too

[@BigFrogs4x4]

Ya. Return them.

[@howdydoody30204b]

The injectors you linked to are not available, and none on Amazon have good reviews.

[@BigFrogs4x4]

A friend of mine just bought some from ebay.

[@SoapAcademy]

I appreciate all the detail in your video. Subscribed! Did you have a recommendation on those fuel injectors? Thank you

[@BigFrogs4x4]

I got mine from Ebay but can also be found on Amazon. There is a noticable difference. Engine runs smoother and has a quicker throttle response.

[@BigFrogs4x4]

Thanks for subscribing!

[@thaddeusbarrick8432]

Can the upgrade injectors be done to any vehicle

[@BigFrogs4x4]

If they make a set.

[@BigFrogs4x4]

They are vehicle specific.

[@thaddeusbarrick8432]

@@BigFrogs4x4 where would i look for a set if there any for my vehicle

[@BigFrogs4x4]

I googled my engine and the found them on ebay and Amazon.

[@BigFrogs4x4]

Chrysler 4.7 V8 - make use your vehicle is listed. amzn.to/2X3lUsG

[@noorjangaming7723]

My jimny jeep feul average is very bad plz advance me

[@BigFrogs4x4]

I'm guessing you are talking about fuel mileage. The better injectors can help with fuel efficiency but jeeps are poor on fuel mileage. I get about 13-15 mpg.

[@Whiteandsonsgarage]

Awesome video mate, I really should do this to my Jeep tj, what’s the price on them?

[@BigFrogs4x4]

It depends on where you get them. Mine were on Ebay but i have a link for Amazon in the video description. They also have 12 hole injectors on Amazon.

[@SadbutTrue84]

I just got the same type of injectors on eBay for $32, free shipping. Now I've got to install them. That's why I'm watching this video. Wish me luck🤞😂!

[@BigFrogs4x4]

Be gentle, take your time. Double check everything before turning on the key to prime it. And 1 thing I may have forgotten, can't remember, disconnect the battery and be careful of static electric. A small fan a little distance away blowing gentle air around you can help dissipate the vapors.

[@SadbutTrue84]

@@BigFrogs4x4 Are the fumes really bad after draining the the rail and removing the injectors? I live in a town house now and most of my neighbors are smokers🤪🔥! Plus l don't won't to be a nuisance to anybody that might be sensitive to that type of thing (It was pretty strong that time I had to drop the fuel tank; just wondering)...🙄🤔🤨. Might have to take it somewhere more open; maybe🏞️...?

[@BigFrogs4x4]

@@SadbutTrue84 once you release the pressure with a rag move the rag outside or seal it in a coffee can or spaghetti jar. That should help.