4 Attachment(s)
2016 Silverado 5.3 Idle below commanded right after start up
Hey guys, I, like many others am still trying to get my head wrapped around the in and outs of tuning these Gen V engines. The current one I'm working on is a 2016 Silverado with the L83 engine. I've installed a GPI STG1 cam, Speed Engineering long tube headers, and an L86 intake manifold and throttle body. I'm working on tuning the MAF curve right now. The issue I'm having is that as soon as I start it up it does its initial flare and then seems to 'chug' for about a minute or so before jumping back up to commanded RPM. By chug I mean undershoot desired idle by 100-200 rpm. It sometime does this "chugging" when rolling up to a stop. I'm almost sure its a torque table issue due to the timing being retarded during the event but I do not have enough experience tuning these engines to spot the issue. I'm also getting also getting an engine power reduced message but the truck other than the intermittent chugging seems to have every bit of its power. I also want to mention that I have messed with the transmission settings, mostly TCC and inertia settings. I have posted the tune file and a couple of logs of this situation happening. If anyone cares to take a peak and point me in the right direction, I'd happily pay for it. I'm not looking for a freebie, only to learn. Thanks guys.
Edit- I believe the reduced engine power message is from me maxing out the speed limiter.