Sorry i didnt get back with you sooner, I have been trying to get the idle set on a 6xx lift 23x duration cammed 347.... Big ass cam and I am picky so i was trying to make it idle at 850rpm... lol took longer than i thought.
Lol no worries! I’m only partially worthless so I was able to figure out the issue. I’m glad i was able to identify the issue. I am amazed how well it idles though so I’m thrilled so far. Ha!Sorry i didnt get back with you sooner, I have been trying to get the idle set on a 6xx lift 23x duration cammed 347.... Big ass cam and I am picky so i was trying to make it idle at 850rpm... lol took longer than i thought.
yes that is the easiest way to do it. The idea is that we want to know the usable idle valve and timing ranges, this way the closed loop idle is setup using real data rather than guessing at numbers. Take your time and take a datalog of the idle valve sweep and the timing sweep separately for me, we will use the data from the log files to build a histogram and check it against your notes!!
You want to change it to open loop idle in the idle settings window, then the warmup duty steps will be available.
sortof, you will change it back to 20 and return to "use table" so the timing is not locked. count to 6 every time you increase the timing 1* so the engine can stabilize for the datalog keep that info and I will show you what to do with it.@a91what Ok. Couple more questions to confirm I’m on the right track.
See my picture. This highlighted area is where I sweep the timing in step 3? Once I get the info from that I return it back to 20° then take the desired timing number and change it in my ignition table where the car is idling?
Sorry for all the questions.
Idle afr is 13.8-14KPA values are just fine, normally we use vacuum as a reference when we dont have the software in front of us so you are OK.
I do need to know the AFR..
Did you do a sweep of the IAC duty% ???
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