Download video: 5.3 with 4.8 Flat Top Pistons + TSP 220r Cam, Fist Startup - Factory Harness Wiring - LS1 LM7

Channel: AGearHead4Life


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First start up of the 5.3 going into my '87 Chevrolet Truck. I hope to get it swapped into the truck within the next two months.

5.3L LSx (165k Miles)
4.8 Flat Top Pistons (Used) (10.6:1 CR)
Home Ported 862 Cast Heads
LS1 2" Intake Valves (Used)
TSP 220r Cam - 220/220 581/581 112lsa (Used)
PAC 1218 .600" Lift Valve Springs (New)
Schoenfelds LSx Truck Swap Long Tube Headers with Tech Line Coating (New)

People often ask me how I run the LS motors without modifying the factory harness. First make sure that the VATS (Vehicle Anit Theft System) is disabled in the PCM by having a tuner turn it off when he "Flashes" the PCM. (You may want him to turn off your emissions at the same time.) Then give power to pin A9 of the C1 plug of the fuse block. Thats it. Make sure that you've given the fuel rail about 58 PSI of fuel and it'll run. Hook up the starter of course, but I shouldn't have to say that.

The link below from shows you a photo of where to give power.

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How To 4.8 Pistons at home:

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