I have a 1990 grand marquis 5.0 and I am trying to identify a part.
It is located at the top of the middle of the firewall directly behind and above the engine, looking at the engine from the front grill.. It is black plastic with one or two small gauge vacuum hoses going into it with a wired harness also.
I am not sure but I think it is a "module" named part with a three letter abbreviation name. I had a digram of it but lost it.
Thanks for any help!