Loss of Power Durring Acceleration

[dschallmo98expo]

I am experiencing a loss of power during acceleration. This generally happens as the truck is driven in town and when it has been running for 30 min or more.

Once stopped at a stoplight and the light changes, it comes off the line no issues but when it shifts into second all power is lost. and I have to floor it to gain speed. shifting to third and forth are fine.

I have replaced the TPC, EGR, AIR FILTER, Cleaned throttle body, replaced MAS and 4 O2 Sensors and 4 Cats on exhaust.
just replaced the dtmf sensor and the pvc valve.

I'm stumpt. the only thing possibly? fuel pump?

thanks for any help in advanced.

 

[dschallmo98expo]

Well, after replacing several parts that did not need to be replaced (Electronic) the issue was a clogged CAT. Had exhaust replaced and situation resolved.

then 6 hours later sold the 2000 expo.