PO 343 code
Melting Slicks
Joined: Oct 2005
Posts: 2,877
Likes: 9
From: Ottawa Ontario
I had this code from when I installed the new motor because the 2 outside wires on the LS2 to LS1 converter cable had the polarity reversed. My car was hard to start and would make popping and farting sounds in the intake and the exhaust would grown. Once I swapped the 2 outside wires around it went away and the car starts better now without the previous issues.
I would be suspect in your case because you have a stock motor with no lock tight on the bolts and i have also heard of the bolts backing out after putting a blower on them.
My LS2 motor was built by A&A so I had called Andy to ask him about my issue and he told me to reverse the wires as he had seen this issue before with the wiring harness I was using and it worked.
Hope this helps!
I would be suspect in your case because you have a stock motor with no lock tight on the bolts and i have also heard of the bolts backing out after putting a blower on them.
My LS2 motor was built by A&A so I had called Andy to ask him about my issue and he told me to reverse the wires as he had seen this issue before with the wiring harness I was using and it worked.
Hope this helps!
Premium Supporting Vendor
Joined: Oct 2004
Posts: 23,599
Likes: 1,224
From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
most common is the bolts, but I have seen a stock connector fail at the cam sensor once, check the connection in the plug.
