Hello US friends, I have bought a Cadillac Eldorado 4.1 liter Bj 1985, but it is not running properly. The seller said that he had no power at all during normal exit. The engine starts well and runs very restless and there are also again and again false ignitions in the carburettor audible. It also takes very bad gas and the oil control light does not work out. The ignition sequence fits. The ignition cables are properly laid and the ignition gun also agrees with the 1. Zy With compression, no one is under 9bar. I once put down the valve cover and I noticed that the valve play is far too large. Can it be that several hydropumps are defective and therefore it has no oil pressure anymore? How could I find out why there is no oil pressure anymore? I am grateful for any help.