Idle issue-67 Nova

[xtreme]

I have a 67 Nova that has a 01 vette engine transplanted in it. I can't seem to make it idle. I flashed OS 12584929 and made mods to VATS, ECT, and removed the rear O2 references. It only starts with by applying throttle of 10% or more. With throttle applied it runs at 1000-1200rpm, spark 30 degrees, trim -3% to 0%, injector duty cycle of 3 to 4%. If the idle falls below about 950 then it dies. I even set the idle parameters at 1000rpm and it won't idle. It must have something to do with the vette throttle system. Any advice...

[TAQuickness]

there are a lot of idle tuning threads to be found with a quick search.

You'll want to dial in the RAF (search for B4307 or RAFIG), AutoVE the idle range, and use the bi-directional controls (bidi) to determine the optimal spark and AFR for your idle.

[bink]

I have a 67 Nova that has a 01 vette engine transplanted in it. I can't seem to make it idle. I flashed OS 12584929 and made mods to VATS, ECT, and removed the rear O2 references. It only starts with by applying throttle of 10% or more. With throttle applied it runs at 1000-1200rpm, spark 30 degrees, trim -3% to 0%, injector duty cycle of 3 to 4%. If the idle falls below about 950 then it dies. I even set the idle parameters at 1000rpm and it won't idle. It must have something to do with the vette throttle system. Any advice...

Fly by wire or Cable?
ECT or ETC changes??
Modded engine or stock??

Pics??? Sounds like a great transplant to me.

[joecar]

Yes, pics...

[xtreme]

Thanks for the advice,
It was b4307 causing the problem. I thought that I had modified it when I started the tune process based on the many mods on the build. Just had to go back to the basics.

[joecar]

Yes, pics...

If possible...