just put the LQ4 in my 98 camaro. the only problem it has is popping/backfire while cranking. sometimes it will crank right up but most of the time it requires very slight opening of the throttle,and sometime it cranks it butt off, backfires and caries on like the distributer is 180 out.lol. it is internally stock except has the stock truck heads milled .045, and a 224/228,.581.588, 114LSA cam. other than that it is stock 98 computer and wiring. i thru together a base tune for starting it up from bits of my tune from the stock LS1, a stock truck tune and a tune from the repository with a similar cam. absolutly no driving or idle problems with the small cam. runs and drives as good or better than ever.
ANY suggestions on what to look at/change.here is my current tune.