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injectors

  1. 911 Problems Forum
    Got a LB7 bought refurbished injectors from injectorsdirect.com last weekend got on the truck hard one time and now I have a fuel knock on cylinder number 7 I know this because I took my scanner and commanded each injector off and when I got to number 7 the knock went away has anyone bought...
  2. 07.5-10 LMM Duramax Powertrain
    Whenever I climb grades my pickup goes into limp mode from low frp. I have rebuilt my fuel filter housing, race plug and replaced a rubber feed line. I do have a Fass 165 also. The actual frp is 22k to 23k max while the dfrp is 26k. 2008 LMM 179,000 miles. Bad injectors or bad cp3?
  3. 01-04.5 LB7 Duramax Powertrain
    So I just picked up an lb7 with 158,000 miles on it one owner truck , drove it 2 hours and it drove perfect no check engine or anything , when I first checked the truck I drove it got it warm and check the blowby at the oil cap and it was a small haze it seem normal , when I got home doing...
  4. 01-04.5 LB7 Duramax Powertrain
    Hello! I am new here and have been loving the amount of information available on this site. I have owned a 2002 Silverado 2500HD LB7 for about a year. The truck is stock and has 470,000 kms (292,000 miles) on it. Mostly highway miles as these were retiree snowbirds. I have been having trouble...
  5. 01-04.5 LB7 Duramax Powertrain
    I just recently bought my first Duramax a 2003 LB7 with 245K miles, I knowingly bought it with bad injectors as that's one of the weak points and I had a well known diesel shop install Some Bosh reman injectors and fuel lines as well as a fass fuel pump/sump and fuel bowl delete. It hasn't...
  6. 911 Problems Forum
    Hi, I have had high injector balance rates right after driving before 1# -.2 #2 1.9 #3 1.2 #4 -1.1 #5 -.7 #6 1.2 #7 -.9 #8 -.9 after #1 -3.9 #2 5.6 #3 5.3 #4 -2.0 #5 .2 #6 3.9 #7 -5.9 #8 -3.3 in park I decided to do injector cleaning with 10-3015 half can with .5 gallons of diesel right during...
  7. 01-04.5 LB7 Duramax Powertrain
    Hey there fellas I’m pretty new to the Duramax gang and need some guidance before I throw any more money at the wrong issues. I recently purchased a used CA 2002 Chevy 2500 short bed crew cab 4WD with 180,000 miles from a local dealership and didn’t have any problems when I was test driving...
  8. 04.5-05 LLY Duramax Powertrain
    Ok guys I have a lly thats bone stock. 175000 miles on the truck. I have a random knock that sounds like a bad injector. The conditions have to be just right for it to knock. Light throttle and cruising down the road. Even then it doesnt happen all the time but is becoming more frequent. Get on...
  9. 01-04.5 LB7 Duramax Powertrain
    To all, I replaced head gaskets on 2004 LB7 back in August of 2011 and in the process discoverered the injector inlets had grit covering about 3/4 of the holes and i cleaned them out and went on with the job and once finished it had a loss of power but it turned out to be the valves weren't...
  10. 911 Problems Forum
    Vehicle started, ran for about one minute at idle, and shut off, sounding like it was out of fuel. Unable to restart. First trouble in 130k miles! Both the fuel pump fuse and relay checked good. Dealer hooked it to the computer and reports I need all 8 injectors @ $4725.00!! I changed the...
  11. 911 Problems Forum
    first off truck is an 05 lly with 97000 miles, edge juice w/attitude 4"mbrp exhaust and lbz turbo mp. Other than that its pretty much stock i did head gaskets on it about 15000 miles ago and havent had any issues up until now. The problem happened about two weeks ago on my way to work in north...
  12. 01-04.5 LB7 Duramax Powertrain
    I just bought a 2001 gmc sierra with the 6.6 duramax. it ran fine for the first few hours i had it. i went to take a drive after it sat for about 20 minutes and it started then died as i went down my drive way and would not start back. after buying a new glow plug control unit it would not start...
  13. 01-04.5 LB7 Duramax Powertrain
    Im new here and first time posting. I tried searching but still wasnt for sure so i thought i would just ask. I have had a 2003 ccsb for about a month now. Since i bought it it has had a slight surge in idle, and little puff of smoke on start up and idle sometimes. No loss of power or loss of...
  14. 01-04.5 LB7 Duramax Powertrain
    Im about to put in a set of injectors and an air dog 165 i think..havent made up my mind on what pump yet..anyway this is the first time the truck has been torn into since it was new..I was thinking that with the high miles I was going to do a compresson test and check the valves to make sure...
  15. 01-04.5 LB7 Duramax Powertrain
    hey guys I just checked my balance rates with my Diablo Predator I bought off Ebay and here are the results... #1 -2.85 #2 0.15 #3 -0.32 #4 -1.60 #5 1.49 #6 5.33 #7 0.97 #8 0.48 In drive the #6 cylinder drops down to 4.75. When a little throttle is applied in drive they all go to...
  16. 01-04.5 LB7 Duramax Powertrain
    So i just did all new injectors in my lb7. Got it back together and its loping real bad. After i give a little throttle the loping goes away but at an idle its aweful. So I checked for leaks, nothing. Wont hold a prime either. So i just got off the phone with this diesel mechanic at tires plus...
  17. 04.5-05 LLY Duramax Powertrain
    well i got my new injectors in today. cool. I went to vacuum out my cylinders and much to my surprise im vacuuming out oil... and that isn't cool because i didn't notice anygo in when i was pulling out my old injectors. can oil get in there when u have a bad injector or something?:help
  18. 01-04.5 LB7 Duramax Powertrain
    So I got all the injectors out waiting on my new ones (suppose to be here day after tomorrow) any hints or ideas on the first steps i need to take BEFORE i try turning it over for the first time? I have a new filter on and all that jazz but how do I prime these bad boys? IM NERVOUS lol this has...
  19. 01-04.5 LB7 Duramax Powertrain
    Im seriously ruling out plugged fuel filter, im gonna change it out anyways. On my way home from Denver I noticed my truck was smoking blue-ish white smoke when stopped for an extended period of time. I shut it down checked the oil and noticed it was low a little over a quart. It didn't smell...
  20. 01-04.5 LB7 Duramax Powertrain
    Hi guys, new to the forum and to diesels. I have read a lot of the threads about LB7 injector issues, but they still leave me with a question. People mention fuel in the oil from bad injectors, but no one seems to have had any bearing failure or other related problems. Have there been? How...
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