I have a question about the idle speed regulator. On all the DeLorean's that I've looked at, I've noticed that there are 2 versions of the idle speed regulator: A black one, and a gold/brass colored one. On every DeLorean I've seen that has the black on installed (including mine), the engine comes down quickly from a rev, then dips below 700 rpm's. When the happens the engine always shutters and almost dies. Most time it is so bad that the alternator warning light will sometimes illuminate. On the car's w/the gold colored units, the engine always comes down gently to it's idle and never goes below 750± rpm's. My question is this: 1. Does anyone know the BOSCH # for this 2nd version? 2. Which version do the parts suppliers ship? -Robert vin 6585