So its running know? The website 190rev was very helpful in seeking many answers to my delimia ,you can search their site and have other owners chim in who also have a working understanding of the cosworth 190e ,this car has some unique futures .A volume of printed material about the Q & A from their site can be printed out about Fuel Related Issues.Another possability is that the owner before you may have opened up the fuel distibutor which is a big no no ,with all the new parts being replaced in the fuel system It sounds like their was some tinkering going on which can get you in more trouble especially at the FD.My guess is he lost interest after spending $xxx and a REBUILT FD was to big of a price to pay for final success.The sonic cleaning is an old motorcycle carb trick which I read over on 190rev back in the day ,you simple buy a Harbor Freight sonic cleaner ,$34. a gallon can of Gumout parts cleaner ,$20 and set it up to run several times during a 2 day period ,the cheap sonic cleaner can only run at 5 minutes at a time,with the FD in the solution,the amount of sediment was amazing.I would read some more about the method ,youtube has some vids, and make your own thoughts about which way you want to head ,if your next step is going for the rebuilt FD then the steps to Sonic clean is only a small price to pay comparing the 2,this is exactly were I was and decided it was worth a try.