Comparing Fuel Injectors for Performance and Fuel Economy 

That's quite a neat tester you demonstrated for us. Appreciate the patience you used to demonstrate this for us. Thanks!

Very cool test. And a bonus no background music

Great job on the video, I just ordered the 4 port version and I love it. Thanks for posting, I will be posting some videos using this awesome tool as well soon. But in the mean time you really helped me understand better what I was looking for and I just purchased a set of fuel injectors that I hope help my car run better and have better fuel economy.

Another great video sir!!!! So happy I followed your original advice and went with those 12 hole injectors! Thank you!!!

Saludos desde España Martín!! Gracias por lo que haces, es muy útil para los que tenemos un WJ 4.7. Animo y sigue así 👍

Genial!!!!!!!!!algo que esperaba ver hace mucho tiempo!!! Muchas gracias!!!!

"We all got a new Fi tester".. thanks! :O) I have no doubt you R the "Injector Whisperer" now (3 years later:). Some really good info in your videos. I like the way your gray matter operates.

More people like you should exist. This explains why my car was runnin funky after my friend put some "new" injectors.

Very cool test Martin!

mein...you guys in the states have all the fun! I have never seen a test like this done before.

This was eye opening! Thanks for the info, I'll be picking up denso to replace my green banded cracked injectors.

cool. hope to see lots more comparisons

Another Great Video on 4.7s. Would be delighted to see a series on building your HO engine. I have a 04 HO with 197K miles that is due for a rebuild. There are RU-vid videos on the rebuilding , but your RU-vid videos are fair more detailed and superior.

That was awesome Martin!!!

Great video. The machine removes all the variables and with a direct comparison, it was easy to see the performance of the individual parts.

great video thanks martin

excellent video .. nice kit .

Very nice tests.

Amazing content, thanks!

awesome video man, im looking at upgrading my injectors and ecu(haltech) on my m271 c200k and have been scouring the internet but no one likes to talk about efficacy its all about flow numbers, i want the best performance not just the peak performance and if the better injector improves torque throughout the entire rpm range and not just peak then so be it, motors are just heat engines and extracting more heat into work is the aim of the game.

Green Bands are in the 2004-2007. All my 2004 4.7's had/have them.

Nice, I just paid a diesel shop to clean and flow test some scrap yard injectors

well run tests,thanks

Enjoyed. Do an injector test for 4.0 IL6... what might be preferable under load test.

Hey Martin you have some great detailed videos! Some injectors i would love to see compared are the oem injectors form 02-06 tahoe/suburban the flex fuel injector vs non flex and the way the perform with there different pressures (flex trucks 48-52 non flex 55-62)

Awesome video!! Thanks for taking the time and showing us mechanic heads what fuel injectors are the best for the 4.7l

Martin! Still waiting on a walk around your grand Cherokee! It’s a sweet ride!

Is it possible to use those Denso injectors on other applications than 4.7L, like a Ford 3.5L Fusion Sport? Or are they built with a particular rating in mind? Sorry, I don't yet know much about injectors, but I'm doing my research. Great video, I've subscribed and look forward to learning more!

Great video!!!

very cool!

Good information about injector comparison

Do they have to be Denso branded or could they be the aftermarket equivalent? Awesome channel 👍

I just subscribed sir. I like your channel

Hey great video good info maybe a better up close camera shot of the spray pattern and would love to see some chevy ls injectors new vs old and e85 thanks

Nice video.

Awesome video Man I’d love to send you some injectors !! Also how much did that equipment cost you ?

Thanks for that very interested video. I am trying to upgrade my 91 Festiva / Kia Pride injectors to something more modern and efficient.

Hi Martin, Been following your built for some time. I have an 2004 WG (European WJ) with the red Bosch injectors on my 4.7 HO. I have recently acquired an DRB III emulator and I can see that my long term fuel trim is at Negative 20~18% and even the short term trim ones are negative 16~18% Can the injectors be the cause? do you have any idea how are your fuel trims with your Denso injectors? Thanks and keep up working on that great machine

Hey Martin, I love your videos, I subscribed to your channel as soon as I bought my dodge. I just got bosch 0280158103 injectors with 12 hole and 259cc flow rate for my 07 Dodge Ram 1500 4.7. What is your opinion on those? Can you do a test on them? You can find them on the Mazda 2.3 L3 motors. Thanks in advance!

great stuff man, what do you recommend for a 1.4L engine?

Cool test. Listening to see if one is louder? My new denso 12 holes tick.

Hi Martin great video very informative ! I have a 2005 Honda CRV with a 2.4 engine it has over 204k and I need to replace the injectors, as far as I know they are the original injectors. Do you think its worth me replacing the filter baskets and cleaning them ? If not what injector would you recommend Thank you in advance

Very cool. Would like to know what you think would be the best upgrade injector for my 98 Cherokee xj. 4.0L

hi what fluid do you use for the flow test and the ultra sonic bath?

What fluid do you use in your machine?

Cool vid and Cool test, could you test the Carquest Injector?

i've got a 2008 ram 1500 with the 3.7 v6. got a miss that i feel is an injector, so i want to replace them all. i want to use the Denso 12582704 but i can only find matched sets of 4. where could i find a flow matched set of 6 or 8 if need be.

Hello martin,love the denso upgrade demo,been smelling fuel on startup but see no leaks yet,thinkin its time to change out mine.not sure i want to chop up things to make densos work,so just curious the bosh 12 hole type is that for a 4.7l and is it just plug n play or do they also require tweaking to fit,also how much they run for 8 pieces???? 2002 limited,snookie pa.???

So I have been using your videos alot here lately trying to do the ho cams and intake swapping. I've got a question for you and see what your opinion is on the issue. I know I've seen some car guys wrap the injector rails with heat shielding tape. Does that do anything for improvement on fuel mileage and power, or it a waste of time?

Hey the link for the Denso injectors is still good on Amazon? I been eyeing them but the part numbers looked different than what you put on the screen

Do the imfamous 12 hole ford. Vs the 4 hole

Hi, brazil , after see max gdi 400, you gone liked. Enjoyed.

I have a 5.7 L Hemi and I was just wondering what injectors would give me the best fuel mileage 42lb or the 95lb?

Hi martin nice comparison. Is the AcDelco GM Original injector 217-2907 and the same injector as the Denso 12582704 these for a wj 99-04 Thank you in advance for your answer

those look like the slightly older style ev6 injectors does the new ev14 4 holes do any better? also marine boat injectors with the ball style would be cool to see!

Thanks for sharing. Have you compared Bosch 23bls 4 port MDH-94-855 injectors?

Hello, I have a 2000 camry 2.2l with high postive long term fuel trim at 20% at idle, but at higher rpm it drops to 5%, but I cannot find a leak, would a exhaust manifold or intake manifold leak would cuase this? I also have do NOT have check engine light on.

Was wondering if you could adjust the pressure of each injector to test at the specific pressure of the fuel pump in different vehicles or even if it mattered ? Fun stuff !

Maybe test all the different injectors for the 4.0 and the 24lb Ford injectors for the strokers

Would love to see dirty to clean injectors and what cleaners were used.

I have a ford 2011 Ranger with a 4.0L I’m not sure what stock injectors it uses but I’d really like to find a better preforming one if possible

What is the injector that filters the gmc Sierra 2006 4.8 . machine? fuel economy

Anybody have experience with the Bosch 12 hole 24lb injectors? I got the s&j stroker on the way And wanna get the rest of my parts here

Hi Martin, I've been playing with few injectors from my jeeps and around th same test bench and something strange happened,,let me tell you, I bought a set 24lb Ford Racing injectors for my Renix with no cat French export version, before installing them, I bench tested both type, the Yellow 4 ports BOSCH 0280155746 19.9lb Vs New 24lb. and then....what ever were the test, idle, speed test, hi flow etc, each time the bosh were spraying more fuel. I said to my self, it can't be, so I installed them and as I run open loop in stock form and as I dont have fuel trim but an after market wide band lambda, I can check my AFR and of course, my lambda dropped from 1 to 0.9 So in the test bench, they look to flow less but more when mounted on the engine. Few days after, I came back to the test bench....why is that....I started to make test again, same result, then I look to machine parameters, I found that pulse width can't be adjusted on all tests, why is that, during hi flow test or other it's like pulse is way too short compare to real pulse width ( 5 to 20msec from idle to full load on E85 on a 5.9 for exemple ) Only on idle test I have been able to crank PW from 3 to 20ms, and than as soon as I start to increase PW, the for Ford racing start to deliver more fuel than the Bosch. What do you think ? what was your pulse width during test ? have you been relying on the bench test pulse width ?

Any updates on the injector bench tester? Long term review of the machine? Would you buy the same one again or look elsewhere? Thanks!

Hello, can you suggest what is the best brand of gasoline injector cleaner for dosing annually into fuel tank?. Or your experinces or testing says that injector cleaners does not work!. Fuel dilution in engine oil originates from poor injector spray?. Thanks.

i just bought the ulta-power mf1475 injectors can u compair them to the benso,s

Hi Italy 👋 MISTER.. Big...king

What would be a Denso equivalent for a 4L5Z-9F593-A from a 2002 Ford Ranger with the 3.0 V6?

My 05 Dakota 4.7 (N) 53032704AB are splitting top to bottom. So, I'm looking to replace them, suggestions?

2001 DODGE DAKOTA 4.7 WHAT INJECTOR DO I WANT FOR GOOD MILAGE AND SOME TOWING? THANK YOU

Can you run a rest on 4.0 injectors vw injectors etc. I see lots of opinions but you now have a way you prove it. I actually run a 4.6 stroker but not sure if my 93 electronics would run any of the injectors you tested.

simple question I already know but need confirmation, do most injectors fit size wise, I need to replace a few and Im just going to do all 6. I want to put those densos on my charger which I think stock poundage is 24lb injectors. They are 4 hole as is.

Well all my family at is finally done and I can get back on my 4.7...i got the Denso fuel injectors out of the junk yard...gotta clean them up and get them in...

Regards!! I am having problems with my machine, when I try to drain it’s start the timer but does not drain... How can I fix this problem? I will appreciate your help with this problem!!

Hi, have you measured how much the fuel economy improved after changing the injectors?

i got a question if I have oem injector 1pin hole @ 243.8cc p/m and swap for 4pin hole 232.1cc p/m, will the 4pin hole spray more fuel than the single pin hole? can the 5.9L magnum benefit from 4pinhole vs the oem 1pin hole?

In the description for Denso 12582704 - wrong link for AC Delco injectors. Is it the same as AC Delco 217-2907?

That machine is sweet! How much to bench test my injectors? Are four hole better than two. I'm rebuilding my top end and I got to tell you those Chrysler components even after 60,000 miles I had it rebuilt in 2016. You look new valve seals and the injectors look amazing

Very informative. Want to change the Injectors on my 2006 Dodge Ram 1500 TRX4 with a 4.7L V8 as the engine seems to be under powered and a dog like the Chevy 305cc of the 1980's. Will the Denso Injectors significantly boost the HP and performance? Also got an K&N Air Intake on the Truck. It also has a 390 Rear End. Can I also buy Denso Injectors new online? Do any modifications have to be made when one uses the Denso Injectors? Are there any other Mods that you can suggest that will enhance the performance? I also have a 2006 Jeep Unlimited Rubicon with a 4.0L I would like to change the injectors on as well. Both Vehicles have a 6 Speed Manual Transmission.

Would these Denso injectors work in a 4.0 jeep? What’s been your experience there? Trying to get the best option for my engine.

so what is the best injectors for 1995 YJ 4.0L ? for direct replacement ?

Martin, I drive a Buick park avenue with a GM 3800 model 2 ultra engine. I do that in the Netherlands in Europe. In the USA that is a car for grannies but in Holland it is a real car from the USA and therefore really nice. In your opinion, what is the best injector (make and model) for the best performance and fuelmilege?

Im glad you did this test...we were discussing this a while back... So what are the White Band injectors?

Just found your channel, you seem to be a very knowledgeable mechanic, at least a darn good injector man. I have Keihin injectors on my 2011 Triumph America I'm working on now. Do you know much about Keihin fuel system? I'd like to see how they look on your machine. Thanks for the informative video, God bless.

I would like to see some China gm injectors against some used oem gm injectors. Thanks

Hey Martin! Another Vegas local here with a 4.7 WJ. Have you ever experienced a rough idle and engine shake intermittently? Usually happens after engine has been running and is restarted after a short break and lasts no more than 5 mins, correcting itself eventually, only to happen again randomly. I replaced my spark plugs hoping that would fix my issue. Thinking about replacing the fuel injectors next. Do you think they could be my issue? Thanks in advance!

Is it the the audio in the recording or was the injector pulse cutting out on the machine?

Martin, what is you opinion of your tester compared to other affordable ones? I was thinking of buying that model, or the Autool 150, 160, or 200. Thanks

what kind of fluid do you use?

Did you ever put your 4.7 on the dyno after all the mods?

I just want to find the best fuel injector money can buy that are the most efficient and have the flexibility to be tuned for a wide range of power. Basically I want the best mpg and reduced emissions with the most tunability for higher power.

Hi what type of ultrasonic fluid you use? What brand pls?

nice job try 156 2.0 alfaromo injector

Why don't they make ultrasonic fuel injectors? Just straight mist it into the chamber? Wouldn't that provide a more efficient or total burn?

What would inceasing fuel pressure to 65 psi do on a 40psi injector? Say using 24 lb injectors.. @ 65 psi versus 40psi?

When pulling my injectors out of my 2002 Dodge Ram 5.9 magnum I noticed at the very end bottom of injector there is a round plastic gromit or seal .. some came out with injector no problem some were so brittle the broke an discinerated into nothing or into small pieces .. are these important An should I get or can I get new seals or can I jus put injector back in without

Other than the Larger Air intake and the 08-13 Intake Manifold you would not recommend the Denso injectors for my vehicle? I am not sure what a Free Flow exhaust is.What other modifications are you suggesting? No one really makes aftermarket High performance parts for this engine, that I know of. I like my wired Intake and do not want to go to a fly by wire. I like Simple. If I was to put the Denso Injectors on without mods, you are saying that I would have problem with the vehicle.

Also do you sell the injectors.

Good morning Martin, would you know the specs on stock 4.7l fuel injectors?