Fuel pump runs after shut off- help needed!

[donkeypunch]

Originally Posted by 53GMC

changed the oil from 10W-40 to 10W-30 and the pump did shut off when i cut the key off like it used to ....this was the first time i had used 10w-40 and when i made the change it was back to normal...thanks guys!

What year was the truck you had this issue with? I have an 87 454 tbi that has a fuel pump relay (i think...below drivers exst manifold) that has always been disconnected and once i found the loose wire i hooked it up (ignition off) and pump turns on?....Does not seem to shut off? I should mention the wiring looks hacked and the truck idles like ****.

Any thoughts?