Loses power after warmup

[parked]

I have a '89 Camaro RS , 8 cyl, 305. Car starts up fine, and runs fine,for about 15 minutes. Then while in drive or reverse the engine sputters and I have to hold the pedal all the way down to slowly pick up any speed. When I put the vehicle in Park, it idles and rev's fine. Whats causing this ?
Parked

[wrightz28]

Have the ignition control module tested, multiple times.

[malletslinger]

But you should also check your cap, rotor, plugs, vacuum hoses, and timing. All of which should only take about an hour(give or take).

[parked]

Thanks for the info, this seems to be where the problem originates from, I'll change the fuel filter to.
Parked

[97cavalier]

is it running hot also? if so change thermostat, and flush raditor.

[AFI 05]

coolant temp sensor, usually cars run like shit shit if this is bad when car is warmed up.

[malletslinger]

Did you check the trouble codes? Mabe the computer wants to help

[parked]

Found the problem, throttle body gasket got sucked into the intake. Car runs great, gotta start watching out for speedo tickets again.

Parked ( no longer)