LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LT1 no spark

Old 07-07-2013, 10:31 PM
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Car: 86 Z28/86 IROC
Engine: 305 LG4/ LT1
Transmission: 700R4/4L60E
Axle/Gears: 3.42
LT1 no spark

Is the ICM supposed to be getting 12v with the ignition on? I have power everywhere but there, using psi harness, i wired up fuel pump and it works fine but ignition relay clicks when turning key on then clicks again, has no spark but has plenty of fuel, now the 2 ring terminal wires that are by the knock and o2 wiring, are they both supposed to go to the starter or is one of them a ground? Reason why i ask is its doing wierd stuff, as i was checking all connectors with key on with test light (i know i know, i cant find my damn multimeter) and unplugged the optispark connection at the engine harness checking it with test light on one of the prongs makes the fuel pump prime.
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