Mike - It sounds to me like a stuck idle speed motor. They can get gummed up inside, and fail to operate correctly. If you unplug it, or fiddle with the connection which can disturb the power to the motor, and the idle drops to 900 rpm, then it tells me the motor is stuck open allowing too much air in when powered up. In regards to the broken allen wrench, you might be able to carefully depress the mass air flow sensor plate enough to get to the adjusment screw in order to extract it. I would definitely get the tool end out of there so that it can't find it's way into the engine (that would be bad). The CO2 screw must be totally corroded. You may have to disassemble enough to get it out and clean everything up. A good adjustment will then be required. Sometimes the short cut is the longest way around. Toby Peterson VIN 2248 "Winged1" DeLorean Parts Northwest, LLC www.delorean-parts.com --- In dmcnews@xxxxxxxxxxxxxxx, "Mike Polzin" <MPolzin@xxxx> wrote: > I am still having problems with a high idle. I tested the frequency valve and it is good. The car was idling warm around 2000 RPM's, and I started to mess with the plug that goes to the idle speed motor and the RPM's suddenly dropped down to a steady 900 RPM's... I thought great, the connections are dirty, easy fix! So I cleaned up the connections, plugged it back in and I was back at 2000 RPM's, and no amount of playing with the plug would change > anything. After taking the car out for a spin, it was then idling at 3000 RPMs. I am pretty sure the mixture is off because the exhaust smells bad, and it is sucking gas at an unreal rate. I tried adjusting the mixture screw because I am sure it had already been tampered with but couldn't get the mixture screw to budge... I snapped my hex key trying. Now I need to figure out how to get the head of the hex key out of there. 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/