[Ruby240]

Uhm, I've been around cars a very long time, even blew up a DE in my 240. When a rod knocks, YOU HEAR IT. It sounds like a little man with a big hammer trying to get out of your engine.

'90 did you even tear down the engine that you "blew" to see what exactly happened? You are having a loss of power, when a rod knocks you don't really loose power, the noise just gets louder and then it stops and your engine stops.

It does sound like either a fuel issue with the pump, or a MAF (oh guess what you can get BAD ones, even brand new!).

Don't go apeshit and think your engine is blown before you check out the easier and more obvious possible problems. 3 main things cause loss of power:

1 MAF = bad
2 Fuel pump = dead
3 Clogged Catalyic Converter = stumbling and really really shitty power to none.

Then you have others:

Spark Plugs fouled out
Spark Plug wire fried
Coil Fried
Injector(s) clogged
Charge piping loose and not connected fully
Clogged Fuel line
Clogged Fuel Filter

These are all things I would definatly check way before I decided the engine was blown. Trust me, if you had a rod knocking or a bearing going out, you will know it by the noise. If you hear metal to metal grinding or knocking, then your engine has serious internal problems.

Oh and FWIW, if you don't have enough oil, your oil dummy light will come on (there is an oil level sensor at least there should be, in almost every car that has been produced since the 60's). And just because you don't have enough oil in the car, it will NOT cause your car to loose power, you just won't have any oil pressure.