OK, so installed the 1988 B2 computer, and she started right up. Problem is, once it warms up a bit, it begins smoking like crazy. Like Uncle Buck's car. Once running on the road, it wants to stall at traffic lights, so I have to keep my foot on the pedal.
With the EGR vacuum plugged (for now), and the new ECU, I ran the KOEO test, and got a 95 - secondary fuel pump circuit fault (after swapping the relay and both fuel pumps!).
The KOER test gave me just the rich 02 reading, no more EGR errors.
So it didn't change much. Should I be concerned about the fuel pump fault? And why is it running so rich? The FPR is working, when I unhooked the vacuum, the fuel pressure went up, and back down when vacuum re-applied. I did smell some fuel in that vacuum line, though. Just a trace, it wasn't dripping fuel or anything. I thought maybe I could drive a few tankfuls of gas through it.
Using a quick google search, these 2.9's smoking and running rich is very common, and I haven't found a fix, just many people who gave up! Lots of people blaming the FPR, the coolant temperature sensor, the MAP, lots of guessing. Anyone seen this issue resolved? I just don't want to guess and throw more money at it.
Thanks
Tom