Hi! 2004 Silverado in speed density. Being in SD, the low octane table is used for spark timing. I can only see the high octane table in the RTT. I tried it anyway with no effect. Am I missing something? How do I get the low octane spark table on the RTT instead of the high octane? I'm running completely open loop, no MAF, no O2 sensors. I used RTT for primary VE and it worked great.
I have the selection with BaseSpark selected. Is this the correct choice? What is HO Spark?
rtt.jpg