LS2 Cam sensor issue
Thread Starter
Registered User
Joined: Jun 2016
Posts: 2
Likes: 0
LS2 Cam sensor issue Trying to help my dad out with his build. He's doing a '38 Panel van and is finally to the point of starting it up for it's first test drive, but it's not running right at all, and keeps throwing cam sensor codes. It doesn't idle well at all, requires just a touch of throttle to even start, and will usually just quit running if not given constant throttle.
The engine came out of a 2008 Pontiac G8, has had a bigger better meaner cam installed, and he's using a GM off highway computer for an 08-09 Camaro. We've tried doing the cam sensor wire swap, and a new cam sensor.
I did do a little research and saw that some of the Pontiacs used a 24x reluctor on the cam, where as the computer calls for a 58x, so he is currently in the middle of pulling the starter to count teeth. I kind of doubt this is an issue since it's an '08, but he wants to check anyway.
Hoping guys can help.
The engine came out of a 2008 Pontiac G8, has had a bigger better meaner cam installed, and he's using a GM off highway computer for an 08-09 Camaro. We've tried doing the cam sensor wire swap, and a new cam sensor.
I did do a little research and saw that some of the Pontiacs used a 24x reluctor on the cam, where as the computer calls for a 58x, so he is currently in the middle of pulling the starter to count teeth. I kind of doubt this is an issue since it's an '08, but he wants to check anyway.
Hoping guys can help.
Thread Starter
Registered User
Joined: Jun 2016
Posts: 2
Likes: 0
Update
Figured out the problem, the reluctor is either seated too deep, or we've got the wrong sensor. The sensor isn't picking up a signal from the reluctor at all. Did some tests on the sensor, and it's fine. So need to find out if their is a different sensor we can get, can I mill off part of the cover to get the sensor closer, or do we need to change the reluctor?
Figured out the problem, the reluctor is either seated too deep, or we've got the wrong sensor. The sensor isn't picking up a signal from the reluctor at all. Did some tests on the sensor, and it's fine. So need to find out if their is a different sensor we can get, can I mill off part of the cover to get the sensor closer, or do we need to change the reluctor?
Ok let's level a couple of things. The crank reluctor on a gen IV will be 58x. This is inside the crank case and can't be counted externally. Not the flywheel. Anything 2008 like yours should be 58x. Now when GM went from 24x crank to 58x crank they went from a 1x to a 4x cam sensor trigger. This is (on)the cam timing gear.
If you and your dad didn't change any of that, then I think your assumption about spacing of the cam sensor may be incorrect. If you changed the timing set, possibly you put a 1x timing gear in there. You'd have 1/4 of the signals needed to run right. Make sense?
See this link for a visual.. A and B are 4x timing gears(1- and 3-bolt cam, respectively) and C is 1x.
http://www.ls2.com/forums/showthread...eels-Explained
If you and your dad didn't change any of that, then I think your assumption about spacing of the cam sensor may be incorrect. If you changed the timing set, possibly you put a 1x timing gear in there. You'd have 1/4 of the signals needed to run right. Make sense?
See this link for a visual.. A and B are 4x timing gears(1- and 3-bolt cam, respectively) and C is 1x.
http://www.ls2.com/forums/showthread...eels-Explained
