These appear to be two totally unrelated issues. The only relationship they may have is something that you did when you changes the plugs.
If you visit our enthusiasts forum we can discuss the problem in detail and get to the bottom of it.
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Most likely you did not align properly the mark, it causes the engine to have wrong timing as result the engine knocks.
Have it looked at by a mechanic.
not a timing issue since the iron duke 2.5 engine has no timing belt
Sounds like something was droped into the engine. I would also like to know why you changed the intake gasket. If it was leaking water/ engine coolant into the cylinders then you may have damaged / broke a piston are bent a rod. Water will not compress.
you shouldn't drive a 95 neon
A knock sensor is a piezoelectric device that senses the knocks produced in the engine. The knock sensor tells de computer to retard the timing in order to prevent piston damage and/or blown head gaskets.
If your engine knocks than that can be a really bad thing, have you recently ran your truck without oil?
Auto ignition of fuel
Check for broken or loose exhaust hanger
White smoke coming out of a vehicle means you need to either get your oil changed or the oil you have is too small of a weight. ---------------------------------------------------------------------------------------------- If your engine is warmed up and blowing white smoke , it sounds like engine coolant is getting into an engine cylinder from a bad head gasket , or a warped or cracked head
I replaced a 1995 town car intake it also knocks now. Not sure. I'll post later when I find out why.
if you follow Jeeps recommended gap the knock sensor activates and it knocks. Just gap to .060 - 075 " and make sure to have plug cap bar on correct. so knock disappears. WTF