402 install my tach doesnt work help !!!
Originally Posted by DrkPhx
If you had a scan tool, you could verify rpms when cranking.
GM switched to the different cam sensor and sprocket sometime during the 2005 production year.
Try this:
1) Turn the ign ON (engine off), and using a digital multi meter (DMM) check the voltage on the ignition feed (red wire) and using a battery or chassis ground. Should be 12v or close.
2) Do the same as above except connect the DMM ground to the CMP ground wire (pink/black). Should be 12v or close.
You need to use the above to check the PCM side connector in two separate locations. First, remove the PnP harness and check the factory harness, then reinstall it and check the PnP connector (PCM side). Results should be the same. You can also try a new cam sensor.
Sounds like you have the GM manuals. If so, refer to troubleshooting & diagnosis for DTC's P0341, P0342 and P0343.
GM switched to the different cam sensor and sprocket sometime during the 2005 production year.
Try this:
1) Turn the ign ON (engine off), and using a digital multi meter (DMM) check the voltage on the ignition feed (red wire) and using a battery or chassis ground. Should be 12v or close.
2) Do the same as above except connect the DMM ground to the CMP ground wire (pink/black). Should be 12v or close.
You need to use the above to check the PCM side connector in two separate locations. First, remove the PnP harness and check the factory harness, then reinstall it and check the PnP connector (PCM side). Results should be the same. You can also try a new cam sensor.
Sounds like you have the GM manuals. If so, refer to troubleshooting & diagnosis for DTC's P0341, P0342 and P0343.
Thanks
Ron H.
Last edited by Mrbowtie26; Nov 14, 2006 at 12:27 AM.
Originally Posted by Mrbowtie26
https://ls1tech.com/forums/generation-iii-internal-engine/495874-damn-ls2-cam-position-sensor.html
I thought according to a post on this thread you needed the 2005 sprocket, as it has only 1 raised spot ? I would think the one with more raised spots would throw the sensor off ? And I did lower my Main VE from 0-1200 by 5% and it didnt do anything. so you are aware car barely can keep running even with me giving it a little throttle, and it is running richer than i have ever seen in a car by FAR the entire area stinks within about 20 seconds of raw fuel. I read in manual that if it was a problem with the crank sensor car wouldnt start at all, I think it is something to do with the cam sensor as my tach doesnt work, but not sure how to properly diagnose it at this point.
Thanks
Ron H.
I thought according to a post on this thread you needed the 2005 sprocket, as it has only 1 raised spot ? I would think the one with more raised spots would throw the sensor off ? And I did lower my Main VE from 0-1200 by 5% and it didnt do anything. so you are aware car barely can keep running even with me giving it a little throttle, and it is running richer than i have ever seen in a car by FAR the entire area stinks within about 20 seconds of raw fuel. I read in manual that if it was a problem with the crank sensor car wouldnt start at all, I think it is something to do with the cam sensor as my tach doesnt work, but not sure how to properly diagnose it at this point.
Thanks
Ron H.
Originally Posted by Katech
Yes, you need to 2005 LS2 cam sprocket 12576407
Do you know when they came out with the 2006 sprocket ? as I got my motor about apr-may 2005 .
Thanks
Ron H.
https://ls1tech.com/forums/generation-iv-internal-engine/607758-new-402-install-my-tach-doesnt-work-help.html
Switching to this post help would be appreciated.
Thanks
Switching to this post help would be appreciated.
Thanks