CHEVROLET BLAZER FUEL INJECTOR

Had A Fouled Plug Or Two On My Blazer. 4.3 Liter. Changed Them. Runs A Little Better But Still Sounds Like It Has A Fouled Plug. Better Then...

What Would Cause The Fuel To Fill Up The Central Port For The Injectors Where The Main Wire Connector Plugs In When I Try To Crank The...