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eeck! Sorry, didn't see these responses until now...


Agreed. Which is why I had manually forced the ITBs more closed...which at that point lowered the idle to ~900 rpms, which is similar to...

I have a Blueprint DBW 427ci LS3 and have had nearly perfect performance since installing last year, which I've run w/ the MAF (starts every time, idles well for a big cam, no weird hesitations,...)....

success (sorta)!! I switched to Speed Density (turned off the MAF), and updated the intake manifold volume from ~10,000cm3 to 6,000cm3 (a rough guess as my ITBs have a very small volume after the...

TPS: gotcha...thanks. (I plugged back in my OEM Throttle, and when I compared the idle & WOT % & Volts were nearly identical).

I let it run only ~30 seconds due to the large amount of back firing...

Started up my new crate motor for the first time and am getting fairly bad back-firing (~3 backfires per second).


https://photos.app.goo.gl/zn3X4ZhXeVt2AkG98

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Engine: New Crate...