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Old 09-11-2013, 12:57 PM   #1 (permalink)
Durarik
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LB7 injector Flow rate IQA

Going to replace injectors in a 2004 LB7. My question is this. Do I need to program the IQA numbers into the ECM on this year engine. I don't seem to find any mention of this until the 2006 model year. Done many gas engines, first diesel.

Thanks in advance

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Old 09-11-2013, 02:01 PM   #2 (permalink)
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No, there is no injector flow rate data to program into the 01-05 DELHI ECM's, that didn't start until 06 with the BOSCH ECM.
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Old 09-11-2013, 04:01 PM   #3 (permalink)
Durarik
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Thank you for this information. I wondered why there was no mention of this, thanks again!
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Old 09-11-2013, 04:46 PM   #4 (permalink)
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When doing your injectors, pay close attention to keeping everything extra clean, especially the high pressure lines, because they usually will have some rust built up on the outside of the threads and you don't want that debris contaminating your new injectors.
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Old 09-11-2013, 07:10 PM   #5 (permalink)
Durarik
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Thanks for this good advice. Can you tell me at what point I should replace a fuel line? What would tell you the line is bad before re assembling to the engine. Is it safe to clean them with a solvent like brakleen or something similar ?

Thanks again !
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Old 09-11-2013, 08:55 PM   #6 (permalink)
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If You go merchant automotives web site he has a injector cleaning procedure, its pretty good has it step by step and pictures.
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Old 09-11-2013, 11:28 PM   #7 (permalink)
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Do you have some pictures of your current lines to look at there condition?
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Old 09-12-2013, 09:01 AM   #8 (permalink)
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Sorry I don't have a photo to post. I will try to figure out how to do that. I can tell you that the lines are not yet off the engine. They are however in very good and clean condition. I don't find any corrosion or rust on the outside of the lines. I know that's not a predictor of the condition under the flange nut, but I am hopeful that they are ok to re use.
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Old 09-30-2013, 06:28 PM   #9 (permalink)
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The fuel line had a minimum of corrosion on them. I used a dremmel tool with a small brush to clean them. Re installed them and they seem to be working fine.
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Old 10-01-2013, 12:00 PM   #10 (permalink)
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For all the work it takes to do injectors, I would replace the high pressure lines. Mine looked clean on the outside, but when I looked in the old injectors, they were filled with rust from removing the lines. I had 4 injectors replaced on the right bank at a shop. They did not replace the lines, and in 13 months, two tested bad already. I have talked to members who have had good luck cleaning them, but I decided not to take any chances.

Many of us would not think twice about spending 400 for an intake, or 700 for an exhaust which can be argued don't do much, but skimp on 5-600 for new high pressure lines when doing injectors. I'm hoping not to have to do injectors again for a long time.
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