Q: Cylinders full of fuel after replacing pressure reg...

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My 98 k1500 5.7 was dumping fuel had poor loping idle but seemed to clear up upon acceleration...so I replaced the pressure reg..buttoned everything back up and it hydralocked....so pulled the plugs coil wire and fuel pump relay...and still shooting gas from the cylinders....cylinders 7 and 8 seem to be the worst....any suggestions on what could be causing this other than a faulty new regulator.

My car has 120000 miles.
My car has an automatic transmission.

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