Pekka Berkeles
11-07-2018, 05:23 AM
Some GMPP LS engines have tendency to idle at 950.
Not a problem anymore:
https://forum.hptuners.com/showthread.php?65222-gmpp-ls3-high-idle
Also if you have surging or bucking, that can be fixed as well. Most typically it is related to an unstable MAF. Just unplug MAF and check if surging goes away.
This is from stock LS3 with unstable MAF:
https://static1.pt-content.com/images/pt/2018/11/1rpmvaihtelee40rpmmaf51-1.jpg
Not a problem anymore:
https://forum.hptuners.com/showthread.php?65222-gmpp-ls3-high-idle
Also if you have surging or bucking, that can be fixed as well. Most typically it is related to an unstable MAF. Just unplug MAF and check if surging goes away.
This is from stock LS3 with unstable MAF:
https://static1.pt-content.com/images/pt/2018/11/1rpmvaihtelee40rpmmaf51-1.jpg