hesitation after motor swap

[BlackBII]

After swapping a 2.9 from my wrecked 90' BII in another 90' BII, I have been experiencing some hesitation, sorta. It feels like a barely clogged fuel filter or an automatic tranny slipping ever so slighty(I have a 5 speed, brand new clutch) I have replaced the filters and map sensor with the one from the other truck, I ran the codes and got and o2 sensor(replaced and getting much better mileage), and a ECT code, could it be a the ect causing me to run rich?(mpg not as good as in other truck) or like maybe the pcv valve? maybe a dying fuel pump?
It's only done this since i did the swap....
the speedo and tac act normal when driving, no obscure moving or jumping...
suggestions?

 

[IMenriched]

recheck your grounds connections...it that doesn't do it i would lean to the TFI module

hope that helps

 

[BlackBII]

now that you mention it i remember some grounds being a little shady....

tfi is brand new

Thanks!

 

[IMenriched]

now that you mention it i remember some grounds being a little shady....

tfi is brand new

Thanks!

Well if the ground wires turn OK....I'd still check the TFI there is OHM reading from pin to pin here in the TRS tech Lib...IF you have a couple that way off the mark...mostlikey its bad.

I had 1 that was brand new too...from summit...went bad with in 50 miles.
I had bought some time (3months) before I actually got around to getting mine running so they wouldn't stand behind it. & I had my pick-up coil (under the distributor) go out too...not sure if the week/fualty pickup coil took out the TFI...don't know. BUT I checked it (TFI) 3 different times...each time the 2 pins that were bad would get a wilder reading....note it helps to write down what you get for ohm readings the compare what "should" be there....to help comfirm...& If you don't have time or Ohm meter... I took it down to the parts store they had a machine that could check them out...no charge

I also had a crappy looking ground wire...things ...little things seemed to help that...seemed to run a bit smoother over all...stuff like that

Hope that helps

hope that helps