Ok just serviced the beast (2000 turbo) air filter was ok but changed it, fuel filter looked ok till I tipped old fuel out and it was old fuel out and it was very dirty, changed oil filter and oil, the oil smells a bit fuely don’t like that. Now next to my coil that is bolted to my inlet manifold to the left I have two connections into the manifold one has a rubber pipe pushed on to it but the other has nothing on it and when I cover the pipe the engine revs drop I presume this is not right but cannot see any pipe to connect to it….help.