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My l84 5.3 cracked some pistons now thinking of doing a light hone but wanted to know if it would even save the engine ? The scratches are pretty light my nail doesn’t get stuck but I do feel em. The pours on the other hand I’m not sure what could have caused those little things ?
96 Chevy K3500 with the 5.7l It has about 215K miles. I am trying to diagnose a fuel pressure issue. My truck first started to run rough like it had a miss. Check engine light came on. I had codes for both banks being lean. I cleaned the MAF sensor with no change. I checked for vacuum leaks. I hooked up a scan tool and checked the LTFT for both banks. They are both at 25%. I hooked up a fuel pressure gauge to the rail test port. Key on engine off it is around 45. As soon as the pump shuts off it almost instantly drops to 0. I am trying to figure out if I have a bad check valve in my fuel pump or if my FPR is bad. Before this all started, I noticed a loss in power. It could barely get a trailer up the slightest incline. I was trying to see if I could find out the difference in the speed of fuel pressure dropping when the check valve in the pump is bad and when the FPR is bad, to try and isolate the issue.
I have a 2017 GMC Sierra 1500. Ok internet gurus, need your advice here. When I'm using my camper, I would disconnect my tailgate review camera and hook up the camper, on my last trip, I got careless and accidently left some slack in the camper wire harness and it landed on the muffler. Needless to say, I didn't notice any issues pulling out of my driveway but by the time I got to where I was going the wire insulation had melted through and stuck to the muffler. I'm assuming that it grounded out and then shorted something out. I disconnected it at camp and when I reconnected the tailgate camera the blue screen and service rear video displayed. I had hooked up the camper probably a couple dozen times since I owned the truck and also coincidently I broke off the little clip that hold the tailgate wire on this trip so didn't worry that it wasn't working at camp because it wasn't tight. I ordered a new tailgate camera and hooked it up, still didn't work. I ordered a new wiring harness for the camper and tried that, still didn't work. I read through all the threads on here I could find about this problem and it basically came down to three things. 1) Fuses, 2) The Video Control Module and 3) Some type of Program update from the dealer.
I tried checking various fuses but didn't do the Dallas Diag Guy thing of replacing the whole fuse block. Not sure I hit on the right fuse but the taillight, reverse lights and tailgate lock all work. I have had the truck for 95K miles and I take it to the dealer for oil changes so I'm assuming I'm current on software updates but I guess that's a possibility but since this is my first issue with the rearview but I don't think that's it. So, now I'm looking at the Video Control Module as a possibility or should I keep hunting for fuses. Does anyone know if 84624987 is the correct # for my 2017 GMC Sierra 1500 if I go that route? Someone posted that # and someone else posted 84691752, so not sure if that matters. Also, does anyone know what fuse I should be checking?
The scanner shows code B127B
By Brad Ashley
I had the original motor completely rebuilt and when put back into my truck it will start and run but once you shut it off it will only crank but not start. Usually a hour later it will start again. . Any help I would appreciate it.
By Dillion Padgett
I recently bought a (Gen 3) LQ4.
I'm trying to swap this into an (Gen 4) 07' Silverado which uses 58x Reluctor, 4x Cam Gear, Front Timing Cover/Crank Sensor, and 2 Knock Sensors located in the sides of the block.
I have a (Gen 4) Truck, So the timing cover/ crank sensor/ knock sensors can be used. I also have a (Gen 4) ECM/Harness.
I know I need to get 58x Reluctor Gear put on & get a 4x cam gear already
My questions are as follows:
1. Can I put a 4x Cam Gear on a (Gen 3 Cam) ? or do I need to get a (Gen 4 Cam) for the (Gen 4 Cam Gear) to work ?
2. Can I use the (Gen 4 Knock sensors) on the side of the (Gen 3 LQ4) ? Just drill/tap & mount them ?
3. If I keep the (Gen 4 Fuel Setup) could I just install that on the (Gen 3 LQ4) ?
Any help or advice will be appreciated.
I'll be documenting everything so others will have better knowledge when putting a Gen 3 Block into a Gen 4 Vehicle.
Thanks guys !
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