Help with DOD cam swap
03-25-2009, 07:02 PM
#11
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ok i dont have the back fireing of the loud bangs i know the loma tray is connected for sure. i got the color coding for the harness of my buddys truck so i will check that tonight after work.
03-25-2009, 07:24 PM
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1) Yes, you have the standard lifters in the DOD holes. Like I said, sounds like you installed the passenger side trays on the drivers side, and vice versa.
2) Yes, you need the LS2 cover to block the oil pipes of the engine block, otherwise the lifter galley oil will backfeed into the LOMA solenoids and reverse circulate right to your oil pressure sender, collapsing the little plastic screen in the LOMA, eventually causing a failure.
The engine would have ran if you had the lifters in the correct hole, and the LOMA connector installed.
I am guessing you are also having intake backfires, or loud bangs from the engine right now when trying to make it run?
The only other thing it could be is that the injector harness in not on correct, but cylinders #1 and #2 (front of engine) have the injector plugs coming from the vertical looms, and the rear cylinders have the other cylinders coming from the rear looms, thus you could sort that out easily.
Good luck.
2) Yes, you need the LS2 cover to block the oil pipes of the engine block, otherwise the lifter galley oil will backfeed into the LOMA solenoids and reverse circulate right to your oil pressure sender, collapsing the little plastic screen in the LOMA, eventually causing a failure.
The engine would have ran if you had the lifters in the correct hole, and the LOMA connector installed.
I am guessing you are also having intake backfires, or loud bangs from the engine right now when trying to make it run?
The only other thing it could be is that the injector harness in not on correct, but cylinders #1 and #2 (front of engine) have the injector plugs coming from the vertical looms, and the rear cylinders have the other cylinders coming from the rear looms, thus you could sort that out easily.
Good luck.
03-25-2009, 11:35 PM
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DOD/AFM lifter trays are completely different than any conventional LS1 type lifter trays. They are specific to the DOD system.
LS7 / LS2 parts can restore the engine to normal operation.
LS7 / LS2 parts can restore the engine to normal operation.
03-25-2009, 11:37 PM
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No loud bangs. Okay, the lifters are in the wrong holes for sure. Tear it apart, pull the heads, and put in LS7 lifters, or put the DOD lifters in the right holes.
03-26-2009, 12:23 AM
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You were not working with any variant of the Active Fuel Management (AFM) or (formerly) Displacement on Demand (DOD) 5.3 engine. These are engines that switch from V8 to V4 in cruise throttle settings. Thats why.
03-26-2009, 09:57 AM
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Ok guys i got it running my throtle body blade was actually stuck and would not move i took it out and lubed it up and polished the throttle bodt bore with a dremel tool and it fired right up... got codes p0300, p1516, p2101, and p0300 again