Just finished replacing the original LB7 injectors on my 2004 LB7 with 110,000 miles on it, with S&S SAC 00 injectors. Other than the usual pains of getting to the injectors, everything else seemed to go back together without too many issues. FWIW - I went ahead and pulled all the injector cups and re-sealed them since I really didn't want to have to go back and do this job again. The other "while I was in there" jobs were to rebuild the factory fuel filter head and swap out all the low pressure rubber fuel lines. For both these jobs, I used kits from Merchant and reused the factory constant tension hose clamps.
After getting it put back together, I primed the fuel system with the factory manual primer (truck fuel system is stock without a lift pump). While pumping, I noticed fuel leaking at the first rubber hose connection from the outlet of the fuel filter. I replaced the constant tension clamp with a regular hose clamp and that seemed to fix it. The engine seems to run ok, and so far I have driven it a couple hundred miles. No obvious leaks, and no fuel in the oil. The one issue I am having is that if I let the truck sit for a few days, and try to start it, the engine will start, then die. I then have to use the manual primer (it will be soft) to get the air out of the fuel line and then the engine will start like normal.
After the first few times it did this, I thought that there might be an issue with the stock factory constant tension hose clamps. So I went back in and replaced all of them with regular hose clamps. Unfortunately, it now takes longer (no longer a day or two, but now if you let it sit for like a week) but it will start then die. And then you are back to priming the fuel system before it will start and run like normal.
Anyone else have issues with re-using the factory constant tension hose clamps? Any issues with the Merchant rubber hose kit? I have since noticed that the Dirty Hooker hose kit comes with new "heavy duty" constant tension hose clamps. Not sure if these are the real issue, or if I am chasing something else.
After getting it put back together, I primed the fuel system with the factory manual primer (truck fuel system is stock without a lift pump). While pumping, I noticed fuel leaking at the first rubber hose connection from the outlet of the fuel filter. I replaced the constant tension clamp with a regular hose clamp and that seemed to fix it. The engine seems to run ok, and so far I have driven it a couple hundred miles. No obvious leaks, and no fuel in the oil. The one issue I am having is that if I let the truck sit for a few days, and try to start it, the engine will start, then die. I then have to use the manual primer (it will be soft) to get the air out of the fuel line and then the engine will start like normal.
After the first few times it did this, I thought that there might be an issue with the stock factory constant tension hose clamps. So I went back in and replaced all of them with regular hose clamps. Unfortunately, it now takes longer (no longer a day or two, but now if you let it sit for like a week) but it will start then die. And then you are back to priming the fuel system before it will start and run like normal.
Anyone else have issues with re-using the factory constant tension hose clamps? Any issues with the Merchant rubber hose kit? I have since noticed that the Dirty Hooker hose kit comes with new "heavy duty" constant tension hose clamps. Not sure if these are the real issue, or if I am chasing something else.
