I bought another Wagon, 89 Colony Park, 178K miles. Seller put new fuel pump in. Car runs but won't idle. I dropped the oil, 8 quarts of black piss water came out, reeked of old gas. I am assuming a stuck open injector. I pulled the vacuum line off the regulator, no evidence of fuel in the hose. Fuel pressure jumps to 40 PSI when I turn the key on, as soon as the pump stops running, dives to 0 PSI. Any thoughts? WagonMan