Anyone with an Ultragauge, Scangauge or Torque app... anything that utilizes the OBD2 port. Curious, have you ever had your Cruze throw a CEL while
the device was actively plugged into the OBD port?
I know my emailed OnStar diagnostics reports are messed up because of the device being plugged in, as I get the following:
|Engine and Transmission System|
|• We were unable to successfully complete a diagnostic test. This issue may be caused by an aftermarket device plugged into your vehicle's diagnostic port.|
If I can avoid it, I'd rather not unplug mine as I'm tracking some long-term numbers. But I got to thinking that I would be horrified to learn if this device is blocking CELs from being thrown?? Suppose I'll have to just pull it out to be sure.
Lately I've been experience what apparently is engine pinging, but no CEL. I just had it in the dealership for scheduled tire rotation and inspections, and as I'm at 35,500 miles, I last minute mentioned this rattle/pinging. They couldn't duplicate during the short scheduled visit, but threw in fuel system cleaner and noted it on my history to cover with any warranty work after 36k. I'm supposed to bring it back for a dedicated appointment if it doesn't clear up. They suspected carbon buildup. Which while it seems very early in the life of the engine, I otherwise wouldn't disagree with because I typically drive <2k rpm and seldom run it hard... plus I use convenience store gas, high turnover stations, but nonetheless not Top Tier.
The rattle is mostly at peak torque rpm and much more prevalent on 87 than 93 (almost nonexistent). Actually been noticing for a few months, but in the absence of other symptoms or a CEL, hadn't thought much more of it until recently. I had thought the rattle was the fuel line on firewall TSB that some have issues with... which coincidentally occurs at the same low RPMs as peak torque. Perhaps wrongfully assumed the engine management would be taking care of any knocking. Unfortunately the Ultragauge doesn't display KR, and I can't make any meaningful sense out of the Timing Advance numbers.
So anyway, in the meantime, I'm definitely back to 93 Sunoco/Exxon/Shell fuel. Will probably get it back into the shop within the next week or two as I doubt the bottle of techron they added will do much.
PS - Haven't been around for a while. Hope everyone's doing well.