94 lesabre, random cylinder miss

[vaporware01]

94 lesabre, 80K miles 3.8L

the actron code scanner is not giving me any trouble codes but is telling me that cylinders are missing. very strange, usually 2 or more cylinders miss at one time for 10 seconds. ie. cylinder 2 and 3 miss-> 10 seconds. then cylinders 2, 5,6 miss for 10 sec or more. then keeps jumping around randomly. Also when rpm on the engine is increased, the engine cuts in and out rocking back and forth like it isnt getting enough fuel. All 6 cylinders are showing misses. I had done the obvious, changed plugs and wires, replaces crankshaft and camshaft sensors, all cylinders are getting a constant spark. replaced pcv valve, air filter. I also checked fuel pressure, I got 40psi with ignition key on and 37 psi with engine running. Disconnected vacuum to fuel regulator and psi jumped 8 psi as it is supposed to. Even if the fuel pressure is in range, can the fuel pump be going bad? Any hints would be appreciated!

[vaporware01]

I also replaced the ECM not too long ago.

[public]

3.1 V6? If so clean your injectors. This is a common problem on GM V6 engines. Good Luck.

[Omerjim]

I am experiencing the same problems with my 97 3.8 LeSabre. Any definitive answers? New o2, coils good, spark module good, injecter cleaner used, dry gas used, new ac plugs and wires, whar next? come on guys, there is a lot of knowledge here help me out.
jim