1990 Silverado ext. 5.7 tbi 700r 2wd

just looking for some ideas or possibly someone else that's had this problem. Starts and Idles fine...rpms climb fine with little throttle...but as soon as it romp it..even half throttle..It bogs. Map sensors good...tps is good. It does have a intake manifold gasket leak..but that was done years ago...I just pulled the thermo and it keeps it from leaking too bad. I haven't driven it much last couple years. Just a trash hauler. Bit problems seems to be getting worse. I'm now in the process of making it an everyday driver. So far...I've heard..fuel pump/filter...worn distributor...plugs and worse were replaced last year. Haven't pulled anything apart or out yet...just looking for guidance before I tear into her. I'm getting no codes from her. TIA!!!

 

Bogs,as in a lean state?you could run it for a bit with c.t.s. unplugged,see if it responds better,that makes it go rich, otherwise, maybe a weak 02 sensor?

 

CTS? Started rough idle today...smelled the cat bad when I got home too.when the weather clears I'll be cutting it out. No emissions where I'm at anyway.

 

Rough idle?fuel smell,black tailpipe?or tailpipe clean as a whistle?

 

No fuel smell or black tailpipes...dont think it's a rich or lean issue.

 

Fuel filter is what caused mine to do the same thing. Why not replace it? Easy and cheap.