I have an ear-splitting whistle coming from the engine, difficult to locate (the whistle, not the engine. I know where that is.). About 4.8kHz if you're interested. Momentarily dips in frequency when throttle depressed but returns at similar pitch. I suspect a vacuum leak. I can't see anything immediately visible so I think it's probably coming from under the inlet manifold, where I gather there is a device called the 'thermal control valve' on the vacuum schematic, and 'thermal vacuum switch' on the spares site. (I wish the terminology would be standardised - much less confusing for the uninitiated.) Also, I have a cold running problem, in that, after starting, fairly easily, the engine dies if I try to rev up. OK once it's warm in a few minutes. This suggests to me that the control pressure regulator is not operating. (I've checked the electrical contacts there, but I think this wouldn't give quite the same symptoms.)
My question is, how on earth do you get to the thermal control valve? It seems like the G-spot of the Delorean - I believe it exists but I don't know how to get to it. My hand is too big to delve into the little crack. Knowing my luck and clumsiness, I could do more damage trying to take things apart, which never go back together properly. I can't find a 'how to' on YouTube but I'm guessing that someone must have done this at some point and know the tricks. It could be just a loose connection or something broken. I see replacements are available.
All helpful advice gratefully received. Otherwise car going well and lamenting no CarFest this year.
Tony in Southampton