LBZ: Programming Injector Flow Rate?

Jose

New member
Aug 23, 2016
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These are the ones from a lbz

So the trim code would be 000FA0D000000000. It this correct?

Notice I added three zeros at the end. Do you know what is the reason of this? I think it should cause a lot of misunderstandings...

Thanks guys!
 

JoshH

Daggum farm truck
Staff member
Vendor/Sponsor
Feb 14, 2007
13,862
966
113
Texas!!!
So the trim code would be 000FA0D000000000. It this correct?

Notice I added three zeros at the end. Do you know what is the reason of this? I think it should cause a lot of misunderstandings...

Thanks guys!
Yes. Add zeros at the end.
 

JoshH

Daggum farm truck
Staff member
Vendor/Sponsor
Feb 14, 2007
13,862
966
113
Texas!!!
Excuse me, What do you mean with "Tops"?

He's talking about the number in the picture I posted that is on the top of the solenoid. Since they are reman injectors, those codes are no longer valid. They have been marked out by covering each letter/number with an X and a new code has been etched in the side of the injector as shown in his picture rather than on top of the solenoid.
 

tmgID01

New member
Aug 7, 2025
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Idaho
#2 is the injector flow rate code. It isn't really worth the hassle to get the codes off all 8 injectors though. The ECM doesn't know the codes don't match the injectors. It will only set a DTC for improper flow rates if the ECM codes don't match the GPCM codes.

attachment.php

#2 is the injector flow rate code. It isn't really worth the hassle to get the codes off all 8 injectors though. The ECM doesn't know the codes don't match the injectors. It will only set a DTC for improper flow rates if the ECM codes don't match the GPCM codes.

attachment.php
I know this is an OLD thread but....I'm in a similar predicament with my LBZ, replacing injectors with new Bosch...and the "code" on my new injectors is all numbers (i.e., 4000000). Seven digits, but just doesn't look right.
 

SoCalMike

Active member
Dec 12, 2010
851
79
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California
I know this is an OLD thread but....I'm in a similar predicament with my LBZ, replacing injectors with new Bosch...and the "code" on my new injectors is all numbers (i.e., 4000000). Seven digits, but just doesn't look right.
Are you looking at the right numbers? you should be looking at #2 in the picture.

1754670392136.png
 

tmgID01

New member
Aug 7, 2025
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0
1
Idaho
I'm looking at #2.....I've attached a picture. I checked with the vendor, they confirmed that it's correct, but I need to use top row and the first digit of the second row.

Here is their reply to my inquiry:

"
The injectors you have are definitely LBZ injectors - that can be confirmed by taking a look at the last 3 digits of the part number marked on top of the injector (042). The complete LBZ injector part number is 0445120042.

As far as the IQA codes are concerned, the complete code is FDF0C04000000. Some information online only references the first 7 characters (prior to the trailing zeros). Either way, those are definitely the correct injectors and IQA codes.
"
 

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