To get the car to idle smoothly you need to go over the whole top of the engine and fix every vacuum leak. Usually this means replacing all the "O" rings, injector seals, vacuum hoses, gapping the spark plugs, cleaning the fuel injectors, replacing the secondary ignition wires, cap and rotor. Now you can troubleshoot the idle motor system, it should hold the RPM's steady after you do all that. Since you messed with the mixture screw you will also have to get the car on an analyzer to get it set right. It should idle smoothly in park, neutral, or drive automatic or manual. You are finding out that many problems underlie more serious ones and you don't know about them until you fix the bigger ones, then the smaller ones now stand out. BTW did you put a plug in the hole over the mixture screw? You should change ALL the coolant hoses, they are all the same age and a leak anywhere will cause the total loss of coolant. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Enid/Jeremiah <hispanicangeleyes@xxxx> wrote: > Hello everyone, > > As my list of completed repairs becomes ever so longer, I have stumbled upon a new problem. This weekend, another DeLorean owner and I did a couple repairs. The repairs included adjusting that hole in the air venturi to keep the car from continually running rich (used a specific tool to adjust inside the hole from rich to a bit more lean - this also fixed the car's "winding idle" problem where it would idle up and down continuously from 900-2000rpm over and over when in park), replaced all 18 fuses in the electrical system, replaced the front 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/