LS swap no spark
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TECH Enthusiast
Joined: Dec 2011
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LS swap no spark Trying to help out a buddy who has swapped in a 5.3 in a 68 Firebird that he's working on.... The thing is not sparking the plugs when we crank the engine with the plugs laying on the block/heads..... I was probing around the 4 pins on the plug going to one of the coils before it got dark on us, seems to have voltage......
I'm posting this short log of us cranking the engine, maybe someone can take a look and identify anything they might see...... We are wondering if maybe the crank position sensor and/or cam position sensor are faulty???
He bought a Fleabay LS standalone harness, I told him to work his own that way he knew it was done right lol. Starting to wonder if the Fleabay harness is wonky maybe also?
I'm posting this short log of us cranking the engine, maybe someone can take a look and identify anything they might see...... We are wondering if maybe the crank position sensor and/or cam position sensor are faulty???
He bought a Fleabay LS standalone harness, I told him to work his own that way he knew it was done right lol. Starting to wonder if the Fleabay harness is wonky maybe also?
"We are wondering if maybe the crank position sensor and/or cam position sensor are faulty??? "
Likely, no voltage to them.
Make sure the wiring is hot in both the crank and run modes.
Likely, no voltage to them.
Make sure the wiring is hot in both the crank and run modes.
