Choice of engine for your swap aside (I'm not a Chevy guy), I honestly think that your swap is a bad idea, because you're doing it for the wrong reasons. To put it bluntly, your motor isn't running right because of something YOU are doing. Idle speed is set automaticly on the DeLorean electronicly. So your leaning out of the fuel mixture isn't going to have any effect. Save for damaging your engine, by running too hot of a combustion in the chambers. Even if the Idle Speed Circuit was disabled/malfunctioning, you could still set the idle manually using alternative means. NONE of which involve tampering with the air/fuel mixture. You've got a motor which seriously needs an adjustment (and probably a new set of sparkplugs at this point too), so my best advice would be to knuckle down, RTFM, and get the motor running properly, the CORRECT way. Setting an idle & A/F is much simpler, and cheaper than a motor swap. And while I'm not going to bad mouth your mechnaic, I've no doubt that he's fully in favor of this engine swap. After all, whom are you going to be paying out a serious amount of cash to, in order to perform this swap? If he has also performed these types of engine swaps on other DeLoreans in the past, ask him for references from those other owners first. Talk to those other owners, and ask then what they thought of the end results, and why they did it? You've got a challenge lying in front of you. Accept it, and conquer it. If it's something that you can't, then there isn't anything wrong with going to a mechanic to have it done for you. I'm just curious as to why this mechanic can't set the idle & fuel mixture for you, with his amount of previous "experience" with DeLoreans... -Robert vin 6585 "X" --- In dmcnews@xxxxxxxxxxxxxxx, "delorean3469" <delorean3469@xxxx> wrote: > i think i'm planning to do an engine swap with a chevy 283 that a co > worker (machanic) is going to do for me. he has done engine swaps in > deloreans before. he is boring and stroking it, and is putting a 350 > crank in it. he says it will put out between 300 and 350 hp. what do > you guys think? i'm just tired of chancing problems with this engine. > i have it burning very lean but it is idealing at 3000 rpms!! > aaaaaaaghhhh To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/