im working on getting my 350 h.o. tuned in using tunerpro. i've got my blm's in the 400-3000 rpm areas from 20-70 map areas pretty dialed in to 128 give or take 6. im having a problem getting it stay idling when i put it in gear and coming down to a complete stop. in park it idles fine. it usually stays running in gear but its constantly trying to save itself.

im running the 8747 ecm with 4F.

maybe just some general areas to look at for idle stuff in the bin would be great.

i've got the target rpms at normal running temps set to 650.

 

I doubt this is much more than a poor partial answer.

Having had similar issues in the past trying to get "Shammoo" it to idle at 600-650, I came up with the simple answer that it was happier idling at 800. No doubt in part due to the cam, split pattern 230/236 and much more overlap than stock.

Touch your pedal to come up to 800rpm or 850. See if the engine is as Grumpy would have said, "happy" more content at a slightly higher rpm at idle. If so, perhaps resetting your target idle might be helpful.

WORDS of WARNING and CAUTION! I'm a rookie, and most anyone here is better qualified to help you than I am.