How To: DIY - Injector cleaning - Chevy and GMC Duramax Diesel Forum
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Old 01-25-2011, 07:27 PM   eBay Motors  #1 (permalink)
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How To: DIY - Injector cleaning

This is a great way to clean your injectors and improve your balance rates.
First go to your gm dealer and buy the GM upper engine fuel injector cleaner p/n 88861802, about 15 bucks. This CAN NOT be run through the fuel tank. To run this cleaner you have to use the quick disconnects at the rear of the engine.

1. Remove the quick disconnects at the rear of the engine, you will need a set of quick disconnect line tools. the return line is 3/8 and the suction line is 1/2.

2. Once lines are disconnected, install rubber fuel hose to the lines with hose clamps. You will need 3/8 hose and 1/2, about 5 ft of each.

3. use 1/2 gallon of clean diesel fuel and mix 13 oz. of the injector cleaner in a container (I used an old rotella 1 gal. bottle)

4. put both the return and suction lines into the container and place container out of the way of engine. (sat mine on a step ladder next to truck). you can set it on the floor but will need about 8-10 ft of hose.

5. start the engine, check for leaks. run all of the the diesel fuel in the container out, will take time. (mine sat at idle for 1.5 hours). if the truck dies, no big deal, just prime it once you reconnect the fuel lines.

6. once fuel is gone, reconnect the fuel lines, should hear a snap. and done. make sure to check for leaks when finished.

hope this helps some people. my balance rates are much better now, and the engine runs much smoother. maybe try this first if you think you have an injector going bad.
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Old 01-25-2011, 07:42 PM   eBay Motors  #2 (permalink)
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Would it be too much to ask for a quick video?
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Old 01-25-2011, 07:45 PM   eBay Motors  #3 (permalink)
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A video of this would be the goods . Hope ya can get one cause I think I'd do mine .
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Old 01-25-2011, 07:50 PM   eBay Motors  #4 (permalink)
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what were the actual #s on the balance rates b4 and after
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Old 01-25-2011, 08:00 PM   eBay Motors  #5 (permalink)
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cannot do a video, dont have a video camera or fancy phone. it is a fairly simple process, even if you dont have that much mechanical experience. as far as balance rates, my #8 injector was averaging 3.6 to 5.0 and after the cleaning is a solid 1.9-2.0 and the rest of my injectors are within +/- 1.0. much better than they were. GM recommends this cleaning every 50,000 miles.
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Old 01-25-2011, 08:03 PM   eBay Motors  #6 (permalink)
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10-4. once my v2 gets here im goin to check mine an will more than likely do this to mine an see what happens. nothing is wrong with mine that i know of jus like nice clean properly workin parts
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Old 01-25-2011, 08:43 PM   eBay Motors  #7 (permalink)
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No problem bud thanks for the good info and i'll be doin this like to keep it clean and make it last.
Good info from good people makes this site the best.
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Old 02-09-2011, 08:17 PM   eBay Motors  #8 (permalink)
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has any one seen any fuel milage benefit from this just courious
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Old 02-09-2011, 08:37 PM   eBay Motors  #9 (permalink)
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Should make a sticky?
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Old 02-09-2011, 09:26 PM   eBay Motors  #10 (permalink)
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work on all Dmaxes? its worth a shot, my injectors in my LB7 were done prob 30k ago, but I don't have a FASS or Airdog, so a good cleaning won't hurt anything! Thanks for the DIY!

a little maintence now saves a lot of money in the long run! especially when it comes to injectors. anyone know how much it is to have an injector system clean/flush from the dealer?
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