Are BOSCH Fuel Injectors Worth It? DIY SWAP

In this video I swap out my fuel injectors in my 2000 Jeep Cherokee. I went with Bosch 4 hole injectors from K suspension. Thanks for watching!

[TaylorFeist]

It may get better over time as well. I've heard the pcm can take up to 50 start ups to get the new fuel and air mixture perfect

[christhomas]

Very detailed. Thank you!. FYI - Petroleum jelly will degrade rubber over time causing it to harden and crack, a silicon grease is a better option for lubricating o-rings

[deadspeed]

I used k suspension 12 ports.. I sea foamed before hand did a tune up then changed them out post ecu reset and relearn I got about 14 to 16 mpg on 3 inch lift with 31s and a roof rack and trunk full of tools after adding a BBK throttle body and cold air I got about 17 running cruise control I’m happy with it mpg changes all the time so this was under best conditions

[MaybachDay]

Just bought a 98 about 6 months ago. About to tackle this, replacing exhaust manifold and head gasket this weekend. Super high quality video, please keep them coming. I'm subbed.

[markmaligres]

On my 2006 grand Cherokee Laredo, I changed the ignition coils, plugs, and fuel injectors at the same time with all high quality parts and I went from 12.8 to 16.6 MPG after I had a misfire on cylinder 4. My advice is if you’re going to go through the trouble of pulling the fuel rail do all 3, not just the injectors, because each one can improve mpg, one thing I saw in the video that I think may get people into trouble is to try to pull the fuel rail by hand like that, I think with enough resistance u may end up braking something. The way I did it was more controlled with high leverage by using 2 pry bars against each other little by little across the rail to raise it evenly because it can get really stuck, and don’t drop an O ring like did which is a PIA to recover

[markc]

"why do I have so much petroleum jelly?" "Mind your own business." LMAO

[shirleyzook]

Awesome vid! Informative, educational and highly entertaining😁

[hummingcatfish]

"You mind yer damn business" 🤣😂

[JoeVizethum]

nice video - well, several opinions about 4 hole injectors - fuel pressure and pulse width are given values - change in fuel economy and performance are not really noticeable.

[dawabbitt]

One issue you haven't addressed is your fuel filter. I've got a '93 ZJ with 123K and changed mine out at approx. 120K. The amount of black silt that poured out of the old filter was scary - I can only imagine the residue left in the tank itself.

As everyone is probably already aware -

• If your fuel filter gets clogged, it can reduce the flow and weaken performance as the engine has difficulties drawing fuel.

• With a clogged filter, the fuel pump works much harder and you may have problems starting the car or notice poor acceleration or stalling... Because of its abrasive action, dirt and contaminants in the fuel can speed up wear and tear, damage expensive parts and even cause the fuel pump and injector to fail.

• For most cases, the fuel filter needs to be replaced every 20, 000 to 30, 000 miles.

• A clogged fuel filter can cause decreased fuel economy.

I went from an average of 13-14mpg to 16-17mpg, just by changing the filter - even though I've been driving it a little bit more aggressively on the freeway.

They're less than $20 for the 4.0 liter Jeep vehicles - some are less than 10 bucks. So, if you haven't changed yours yet, it may make a big difference in all around performance and fuel mileage.

Thanks for sharing this content with us. - I Subscribed to your channel. 👊

[PhatboyHD]

Man buddy you were doing such a awesome job right up to the point you used “Butt” connectors for the new wires🤷🏻‍♂️. Ya gotta know you are supposed to solder those wires and use heat shrink to protect the connection. But hey to each his own👍

[letstalkcaliber]

I get 13-14mpg on worn 33's with 4.88 gears towing a trailer. Stock injectors. The roof rack and lights must be really killing your mpg. I see others suggesting ideas to improve mpg. One not talked about a lot would be to install locking hubs. Allows you to diconnect the wheels from the drive train so the front drive train doesnt move when going down the rd in 2 wheel drive.

[just_indavidlitz]

A cold day 😉🙊
But thanks. I have a spare intake I plan to clean and put new injectors in. Been wondering what's holding them in. Nothing.

[UnderSprayedWhiteSkies]

You mentioned heat soak at the end of the video, and it appears you do not have any type of intake manifold/injector heat shield. A company (Design Engineering) sells a heat shield kit for the Jeep 4.0L engine that protects manifold, fuel rail, and injectors from heat. For later TJs/XJs there is also a Mopar intake manifold heat shield (but to my knowledge no Mopar, fuel rail, nor injector heat shields). Also, please, what purpose do the cables running from your roof rack to your hood corners serve? Thx.

[kpeeks]

Hmm my 96 gets 16.5mpg (18.2 hwy) and it's 236k mi, only thing done was the accel tune up kit. I keep going back and forth on doing the 4 hole injectors.
But might finally do it, chasing the 18/20mpg.

[michaelgolliver]

You can stuff the wire conectors with petroleum jelly to make them moisture resistant as well.

[jaycounts]

Thanks for the video, I was surprised you only got a half mile improvement, I was expecting a lot more than that and 12-13 MPG with a 6cyl isn't very good, I thought those Jeeps got about 16-18 avg.

[bighookpgh]

I would use dielectric grease on the connections and the o-rings. Look into an oil catch can for better fuel economy

[hotchocolate]

Why a lot other guys are getting like 17 mpg ?

[bezalelex]

Toss the petroleum jelly or use it for "none of your business" business and use silicone grease on them fuel injectors instead.
Anything petroleum degrades rubber. So, young-un, don't use it on any "injector" that needs a "rubber" seal. Ya' hear!😉👍