Car: 2006 Chrysler 300C Heritage
Join Date: Jul 2012
Thanked 5 Times in 4 Posts
Still having the same issues. This weekend I changed my oil and switched to Mobile 1 5w20 and a Mobile 1 filter. I also did a dry compression test. First off, the oil didn't solve my problem but it made a big difference on how my engine runs. Its smoother, quieter and seems to rev quicker. The compression test showed 150 to 160 psi on all cylinders and they all built pressure the same. I know this shows the pistons, rings and valve seats are good but, is it safe to rule out a broken valve spring? I ordered a DiabloSport intune, so my next plan is to turn off the MDS, then try a canned tune to see if it makes a difference. BTW, after the compression test it threw P0301 and P0113. I checked the IAT sensor then cleared the codes. They haven't come back. Yet.