Performing a Fuel Injector Balance Test on a Direct Injected Engine using the Xtool D8 Scan Tool.

Рет қаралды 35,518

Күн бұрын

I go through the steps required to perform a fuel injection balance test on a GDI engine in a 2016 GMC Sierra / Silverado. 5.3L engine. L83.
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Xtool D8BT Scan Tool
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LAUNCH X431 V+ PRO Elite 4.0
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Fuel Injector Balance Test with Scan Tool
1: Ignition ON.
2: Command the Fuel Pump Enable ON with a scan tool.
3: Verify the fuel pressure is between 320-580 kPa (46-84 PSI) with the fuel pump running.
4: Verify the fuel pressure does not decrease greater than 34 kPa (5 PSI) within 1 minute.
5: With engine idling.
6: Verify the scan tool Fuel Rail Pressure Sensor 1 parameter is between 1.9-5.0 MPa (276-725 PSI).
7: Select the Fuel Injector Balance function within the Control Functions menu of a scan tool.
NOTE: To perform this test, the engine speed must be between 600-1000 RPM.
8: Select and test a Fuel Injector. Repeat for each Fuel Injector.
9: Obtain and record a pressure drop value for each Fuel Injector.
10: Add all of the individual pressure drop values except for the fuel injector suspected of being faulty. This is the total pressure drop.
11; Divide the total pressure drop by the number of fuel injectors that were added together. This is the average pressure drop.
12:Multiply the average pressure drop by 0.20. This is the acceptable variance from the average pressure drop of 20%.
13: Verify the difference between any individual pressure drop and the average pressure drop is not greater than the acceptable variance.
14: If greater than the acceptable variance
Replace the Fuel Injector.
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Пікірлер: 76

@737mechanic 6 күн бұрын

Xtool D8BT Scan Tool amzn.to/3Mv7yXS LAUNCH X431 V+ PRO Elite 4.0 amzn.to/3RWjeWG

@letzrockitrite8469 Жыл бұрын

Great explanation sir... learning and grateful ... thanks

@joaquinaguirre2976 Жыл бұрын

Thank you very much, excellent video with excellent information, really appreciated. Thank you Mr.

@BuckteethMechanic 4 ай бұрын

Thank you!

@mateo801 8 ай бұрын

I have the same scanner and was trying to make sense of the pressure drop test I did with it. Cylinder 8 has a pressure drop of 4.8. Thank you for the clarification. This is the good side of KZfaq. You have a new subscriber. Thank you.

@737mechanic 8 ай бұрын

Thanks buddy.

@PaulA-ok4ky Жыл бұрын

This was just what I needed to know,thanks man...😎

@siemensol83 Жыл бұрын

Thank you

@rehanautoelectrician5411 Жыл бұрын

Your all video's very important and very helpful

@raymondwallace1031 Жыл бұрын

Good stuff man

@ysitrim88 Жыл бұрын

Awesome very informative 👍

@rowdyrick7091 Жыл бұрын

Very helpful Sensai

@andyhodgev.a.g1291 10 ай бұрын

A great little video that you have put effort into here fella nice one

@markyakubovsky3380 7 ай бұрын

Good video!! I just ordered the D8s. I suspect an injector issue on my Buick Lesabre. Can't wait to check it out. Thx for the guidance!!

@rehanautoelectrician5411 Жыл бұрын

Hello sir how are you My dear sir your are only 1 best teacher

@user-hr5dc4ly3q 15 күн бұрын

I purchased D8W new with free extra battery and AD20 pro in $444

@daysofgrace2934 2 ай бұрын

It's the first step to do and from there if any cylinder is showing more than 1 than perform a leak-down test to confirm before doing an engine rebuild

@johnmitchell8925 11 ай бұрын

From what I've researched GDI engines inherently have a rougher idle than port injection even when brand new. I've owned two brand new 1.4 GM Ecotec cars, One was a non-turbo port injected engine idled as smooth as glass for the two years I owned it. Then I bought a brand new 2018 chevy cruze turbo GDI engine and i noticed immediately that it idled less smoothly Ive owned it 5 years now with no issues but it only has 20k miles 🤣😂

@katzenpapa Жыл бұрын

Did you find the steps to the test on Allddata? Thanks for the video!

@EdwinTata-rx5zk 4 күн бұрын

Yes thanks sir but in need no the best test for somell car like yeart

@RoadHeros610 Жыл бұрын

Also how would I test that with a high rpm misfire ?

@user-hr5dc4ly3q 15 күн бұрын

Master you have very good book learn how use scan tool so can you send to me if in PDF

@happydays454 8 ай бұрын

D7 does it I got it thanks

@user-hr5dc4ly3q 15 күн бұрын

When you press in injector 1 button what happens in injectors is stop working ?

@PaulA-ok4ky Жыл бұрын

Changed fuel injector on cylinder that was having problem, tested after change and still psi way off from others,right back where I started... can someone please help?

@happydays454 8 ай бұрын

I got 2 injector s at 45

@SS-U23 8 ай бұрын

Thank you for the this informative video. By the way, how about LAUNCH X431 pro5? Do you have any ideas on the pro 5? I cannot know if it's for the US market or it was designed for countries other than the United States.

@737mechanic 8 ай бұрын

I think it will work in any county.

@arthurfricchione8119 Жыл бұрын

Very informative video. How do you like the xtoolD8. I do have a launch X431 not the tablet but I guess the mini looking for a larger screen in a respectable tool. Any recommendations? New subscriber I noticed your the 737mechanic. I’m a retired F-14 flight test mechanic. Maybe we have the same background? Anyway I have seen the D8 becoming popular and am trying to make a decision on a more inclusive scanner with more functions and a larger viewing screen. I’ll be following your channel. 👍 Artie

@804MRMAN 9 ай бұрын

I know it's late. But I would recommend the D8 and up from XTOOL. With the D8 being at a mid level price with a high end operating system on par with a scan tool that would cost you upwards of $1,500-$5,000

@tomryan9616 Жыл бұрын

Will the d7 do this test? Thanks for the great lesson.

@coldfront7914 8 ай бұрын

Yes the new d7 will do this test as on 08/2023

@himeedajew 11 ай бұрын

Great vid and explanation just curious where didn you get that list of instructions to perform this test?

@737mechanic 11 ай бұрын

pro demand.

@737mechanic 11 ай бұрын

@@sheepdog3828 No, it comes with 3 years of free updates then after that it is 199.00 a year but you will not need to update it as long as you are using it on your own cars and they are covered by the software that it currently has. Where did you see $174 a month.

@737mechanic 11 ай бұрын

@@sheepdog3828Search for Mitchell 1 diy and alldata diy, both are simular and offer plans as low as 3.61 a month.

@505fastlife6 4 ай бұрын

Two questions for you sir? Where did you get the procedure and would it be different on the Ford 3.5 Ecoboost?

@737mechanic 4 ай бұрын

I used Prodemand for the procedure and ford has a test called Relative Injector Flow test that depending on the year make and model some scan tools can do. All prodemand says about doing that test is to follow the scan tool directions. It is a straight forward test that the scan tool cranks the engine while monitoring each injector's flow rate.

@nick_6.698 10 ай бұрын

What model scan tool would you recommend for mainly diesel pickups. Powerstrokes and duramaxs. I’m looking for one I can turn on and off injectors

@737mechanic 10 ай бұрын

My Autel has been rock solid on Diesel's amzn.to/44vNH2U but I am sure the xtool D8BT will get the job done also. The nice thing about Amazon is if one doesn't do what you need send it back and get the other one. amzn.to/3YKeZ4d

@nonenone1249 10 ай бұрын

will this let you command the fuel pressure on a duramax diesel to test the cp3 test? thanks

@737mechanic 10 ай бұрын

Yes

@_AndromedaGalaxy_ 10 ай бұрын

i thought power balancing the injectors would mean you hit a button and the tool changes something to make them flow more equally. this seems more like just a way to check for a bad injector rather than enhancing power output.

@737mechanic 10 ай бұрын

Yes, you are correct. Scan tools are for troubleshooting and diagnosing issues. A performance programmer is more what you are talking about.

@804MRMAN 9 ай бұрын

It can be used to code and reprogram but it's not as simple as pressing a button, you have to code it through CANbus.

@harrythomas5056 Жыл бұрын

How would you do this test with the Autel MS906BT

@737mechanic Жыл бұрын

The same exact way. The Autel should have the same capability.

@JCGible 9 ай бұрын

😁

@RoadHeros610 Жыл бұрын

Hey I jus eatchedbanithe rif your videos with you using your launch I couldn't find your bakancr test video with the launch ..however looking at this video it looks as if you have a fuel rail with 5 to 7 psi ..are all those cylinders in 1 bank ?

@737mechanic Жыл бұрын

This is a v8 5.3L engine so all 8 cylinders are for both banks. The launch x431 pro does have the same function.

@RoadHeros610 Жыл бұрын

@@737mechanic well actually what I mean is that you have 2 fuel rails it looks like u have 4 injectors pushing under 30 psi all around 25 or 26 so I'm thinking that one bank of cylinders has a lower psi ..so that may be from the HPFP or it's roller ..wdyt?

@737mechanic Жыл бұрын

@@RoadHeros610 So the fuel rail pressures are around 500 to 700psi, the 25 to 26 psi you are seeing is the pressure drop when the injectors pulse.

@RoadHeros610 Жыл бұрын

@@737mechanic ok

@user-hr5dc4ly3q 17 күн бұрын

But when filter bad inside injector how you know in this test

@737mechanic 17 күн бұрын

If the filter is clogged up there will not be as much of a pressure drop.

@user-hr5dc4ly3q 17 күн бұрын

@@737mechanic thank you very much

@TheAngelacevedo Жыл бұрын

I heard the newer D8 version are running Android 10, Do you know if the D8 running Android 5 Will receive an Android 10 update?

@737mechanic Жыл бұрын

I have no idea. I wouldn't worry too much about what android version any tool is running.

@TurnThemWheels Жыл бұрын

Was honestly wondering the same thing

@victorhoyt4352 8 ай бұрын

Will this tool not pulse the injectors like you did with the autel in your other video?

@737mechanic 8 ай бұрын

Yes it will, but pulsing the injectors is year, make, and model dependent. This truck has high-pressure direct injected injectors which means it has a high-pressure pump that has to be pumping and it can only do that with the car running so testing these injectors involves more than doing a simple pressure drop test like you can do on non-direct injected engines.

@victorhoyt4352 8 ай бұрын

@@737mechanicAhh, got you! Thank you for the explanation!! 👍

@505fastlife6 4 ай бұрын

Can you please link the video @victorhoyt4352 is referring to?

@calholli 9 ай бұрын

If you notice on this-- all your odd injectors are around 26psi, and all the even injectors are around 31psi. But they are very similar on each bank. So I wonder if there's just a flow issue with their rail design that causes it to have a different reading on each side? Maybe the pressure regulator is closer to one side and allows it to depressurize just a bit faster?? It's a little weird that one whole bank is lower than the other whole bank.

@737mechanic 9 ай бұрын

Thats a very good point. I might have to look deeper into that and see what could cause that.

@user-hd2db4ti5l 7 ай бұрын

I have the same issue. Any updates?

@737mechanic 7 ай бұрын

@@user-hd2db4ti5l The truck runs good and gets good gas mileage so I haven't worried about it.

@jasonlee4330 7 ай бұрын

Interesting observation. I come from a residential plumbing background and we are taught that when hooking up a double water heater situation if you don’t create equal distance from the infeed tee that the water heater closest to the infeed would always work harder and wear out sooner. I noticed on my 2016 Escalade with the L86 they do account for this and feed it to a splitter that has equal length pipes feeding each fuel rail.

@jasonlee4330 7 ай бұрын

I just purchased an Autel and had run this test on my wife’s 2016 Escalade with the 6.2 L86, I had just finished a basic AFM delete with the new cam shaft and L7 lifters, and I sent the computer of to AMS racing to have it tuned for the delete, I also upgraded the valve springs and the rocker trunions while I was in there, and I bought some refurbished injectors on Amazon so you can imagine my frustration when I fired it up and it had a rough idle. But I gotta say it was so nice for the first time in my life to sit on my ass in that nice leather seat and check nearly every system on that car with my autel and find one injector that was dropping 20 psi more than the others, I can never go back to living without it haha. On that note anyone know of a good place to buy perfectly balanced injectors that are guaranteed?

@alexwalker8422 6 ай бұрын

Rock auto, Amazon is a flea market compared to rock auto.

@user-hr5dc4ly3q 17 күн бұрын

You advice to purchase this scantool

@737mechanic 17 күн бұрын

For the money it is hard to beat. I highly recommend it.

@user-hr5dc4ly3q 17 күн бұрын

@@737mechanic if use obd 300cm extension then you can take this scantoll on the engine and will charging automatically and no need wifi scantool