Search results

Search the forum Search Articles
  1. 03LB704.5LLY

    FICM Failure??? Code P1658

    Do you have a schematic to show which wires are which?
  2. 03LB704.5LLY

    FICM Failure??? Code P1658

    Hi guys so I was driving my Lb7 to Daytona (it’s about a 2 hour drive from me) to pick up some parts for my work truck. So I was going around 70 on the interstate when my truck had a decrease in speed and the CIL came on. I pulled over and shut it off to see if I could find the issue. It was...
    • 03LB704.5LLY
    • Thread
    • lb7 diagnostic lb7 ficm lb7 issues lb7 maintenance lb7 troubleshooting
    • Replies: 4
    • Forum: LB7
  3. 03LB704.5LLY

    Bought an LLY Cranks no start

    That’s where I got my tester but it did not have a duramax adapter, just 6.5. It was also around $140 I had read about one around $40 that Had the adapter but it was out of stock. I’m going to check another HF nearby and see if the other one is in stock. I had to order the adapter and I’m game...
  4. 03LB704.5LLY

    Bought an LLY Cranks no start

    That’s not a bad idea, I checked with advance locally and they did not have one but I will check around some more.
  5. 03LB704.5LLY

    Bought an LLY Cranks no start

    I did check the tester with the adapter on it with the rubber tip blow nozzle on my compressor and it did read to 80psi. That was my first thought as well when the gauge did not move while turning over... I can keep my finger on the GP hole while turning over but it pushes slightly and then...
  6. 03LB704.5LLY

    Bought an LLY Cranks no start

    Thanks guys! That will be the next step.i will update again tomorrow after I have done that, I really appreciate everyone’s suggestions and knowledge.
  7. 03LB704.5LLY

    Bought an LLY Cranks no start

    Do any of you guys think it is possible that the cam has just worn to the point that every valve is off?
  8. 03LB704.5LLY

    Bought an LLY Cranks no start

    I guess I will pull the valve cover tomorrow, I see the pin is still there 🤦🏻‍♂️
  9. 03LB704.5LLY

    Bought an LLY Cranks no start

    Thank you! That was my understanding after researching it but it’s good to hear it from somebody on here. Now I am starting to really understand this issue, if that’s the problem I’ll re-pin and put new heads and rods in! I bought this truck mostly to have a truck strictly for work. I am...
  10. 03LB704.5LLY

    Bought an LLY Cranks no start

    Every Cylinder reads Zero, I’m thinking cam shear pin... I will pull the timing cover tomorrow to verify. I changed the water pump on my Lb7 so I’m not really scared to pull the timing cover! Also I did six revolutions per cylinder with a diesel 0-1000psi tester and correct adapter.
  11. 03LB704.5LLY

    Bought an LLY Cranks no start

    So what does it mean if you get 0 compression? I have checked all and the gauge reads zero, but I do feel air coming out of each one. I put my finger over the glow plug hole and get a push and a pull... I have no idea what the issue is, any advice?
  12. 03LB704.5LLY

    Bought an LLY Cranks no start

    That is great Input! I’m still going to do the compression test when the adapter comes in tomorrow. I will put the results on here. I really appreciate everyone’s insight into this because I would really love to get this thing going no matter the issue (even if it involves another engine). I...
  13. 03LB704.5LLY

    Bought an LLY Cranks no start

    When cranking over it does have some white smoke and it smells like raw fuel(very slight) I also pulled glow plugs to see if any excess fuel was being sprayed into any cylinders as I was instructed by a GM tech. I saw no excess fuel, I’m leaning more towards cam pin or something of that nature...
  14. 03LB704.5LLY

    Bought an LLY Cranks no start

    After a failed compression test i Should pull the heads correct? Previous owner stated they were driving in heavy rain when it shut off with no noises and then when trying to crank it back up it sounded this way.
  15. 03LB704.5LLY

    Bought an LLY Cranks no start

    Here is the video Source: https://www.youtube.com/watch?v=pI2_rleEjIU
  16. 03LB704.5LLY

    Bought an LLY Cranks no start

    10-4 thats a good idea also I did buy a compression tester but it did not have the right adapter so I have overnighted one!
  17. 03LB704.5LLY

    Bought an LLY Cranks no start

    I’m not sure yet, but it does have prime. Originally I thought it was starting too slow but according to my PPE xcellerator it is between 160-180rpm and I believe that is in spec. Do you know how to upload a video here? I have a video of it cranking and it sounds totally wrong compared to my lb7.
  18. 03LB704.5LLY

    Bought an LLY Cranks no start

    So bought an 04 3500 long bed crew cab LLY non running (crank no start) for 3k with new wheels and tires and rebuilt trans and tcase. The previous owner stated that the engine shutoff in the rain with no noises and when he tried to crank it back up it sounded funny (it does, seems slower) i...
    • 03LB704.5LLY
    • Thread
    • crank no start lly wont start
    • Replies: 30
    • Forum: LLY
Top Bottom