Hey all, I've been working on getting my Typhoon LSx swap to idle and had a question. I'm not where I can post a tune yet (don't have my laptop here), but this is a question in general.
First, my details:
LQ4 motor, stock internals
LS6 intake
60# Siemens injectors
2 Bar SD converted OS (done as per the instructional video)
58psi fuel pressure
No MAF installed, Syclone IAT sensor installed.
Here is the process I went through to get where I'm at:
Loaded stock LQ4 tune
Turned off VATS, EGR, rear O2's
Failed out the MAF (zero'ed the table, MAF set to 0Hz, high disable to 12800rpm, DTC's set to Mil on First)
Put in new values for injectors based on the Excel spreadsheet.
At this point I figured I'd try to get it running. From what I've read, since I don't have a cam, it shouldn't be too much to get it idling. Perhaps the intake swap will throw it off a bit, but I had some interesting results.
When I started the truck, I had to give it throttle to get it started. If I went below 6% throttle, it died. If I forced closed loop, I could get down to 2%, but any lower, it would die.
I hooked up the PLX WBO2, and found that in closed loop, I was hitting my targeted afr, but in open loop, I was up around 19
I double checked my FP when running, it was at 58, no problem. I checked for vacuum leaks, no problem. So I decided to start messing with the VE tables in open loop to see if I could get it to change.
What I ended up with was drastically higher values in my VE table around idle RPM's/kPa, like nearly double what they were.
The general question is:
Should my values change THAT much when I'm only running an intake and injectors? I'm only working on idle at this point.
Thanks in advance.