Notices
PCM Diagnostics & Tuning HP Tuners | Diablo

LS swap no spark

 
Old 05-30-2019, 06:32 AM
  #1  
TECH Enthusiast
Thread Starter
 
Join Date: Dec 2011
Posts: 514
Likes: 0
Received 0 Likes on 0 Posts
Default 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?
Attached Files
File Type: hpl
caleb 68 Fbird.hpl (27.5 KB, 2 views)
ElQueFør is offline  
Old 05-30-2019, 06:45 AM
  #2  
TECH Senior Member
iTrader: (3)
 
Old Geezer's Avatar
 
Join Date: Jun 2004
Location: GA, USA
Posts: 5,395
Likes: 0
Received 0 Likes on 0 Posts
Default

"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.
Old Geezer is offline  
Old 06-03-2019, 12:55 AM
  #3  
TECH Enthusiast
Thread Starter
 
Join Date: Dec 2011
Posts: 514
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks for the insight. He is soldiering on with it and it's starting to look like the cheap Fleabay harness is junk.
ElQueFør is offline  

Thread Tools
Search this Thread

About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: