Hi guys
So I've been tuning my VE and am considering full on SD but I'm having some issues.
My question
- To transition from my SD tuning file, to a full time SD tune, what do I need to change in the tuning file? Do I simply enable fuel trims and fuel cutoff?
The reason I ask is that I am having several issues with the running if I try that.
Issues
- First off, even though the AFR is nearly perfect it has a "ragged" exhaust sound and a slight hesitation on aggressive throttle, doesn't sound right.
- Second, the rpm changes frequently when manually shifting in and out of Park/ Neutral. So, I'll be idling in Park and I put it in Neutral and the RPM jumps to 1,300 for several seconds. I then shift into Drive and the RPM jumps again. Sometimes while sitting at a light in gear the RPM suddenly jumps for a few seconds. Sometimes I'll take my foot off the brake to let it roll slowly in gear and the RPM suddenly jumps. At near closed throttle while rolling along in gear I can feel the power cut in and out, as in not a steady power.
- Third, the shifting is poor. Part throttle shifts are delayed, the RPM hangs. The shifts are harsh.
Now, if I enable the MAF all that is gone. But then the LTFTs are 25+, but it drives GREAT!
I had thought if I get the VE dialed in I could simply forego the MAF tuning.
Any thoughts?
Current files attached.
I've attached the stock file for the engine as well as my current SD tuning file that I have been using and my latest scanning log.
Thanks