1993 TBI 5.7 Running Rich

[Zeke's Garage]

Hey guys, a few months ago I was working with this truck, having a no-spark issue which turned out to be a dead-short to ground in my instrument cluster which caused the coil not to fire.. <-You can read more here.

It's been a while, but I'm still fighting with this engine. Since I cut the wire going to the tach, the truck has been mostly usable, but it's still running too rich. I've ignored it for several months since I only need to drive it about 100 miles a month, but it makes me angry every time I get in it and it sputters and craps its way down the road.

I finally broke down and got an OBD I cable and ran the Datamaster scanning software to get an idea of what the truck was doing, and what kind of inputs were coming from my sensors, hoping to find a dead sensor or garbled signal going to the PCM.

After looking through my first bit of logging that I did today, it's obviously running rich as I'm getting a 45 DTC error on every record (O2 Rich) (3600 records captured), plus my STerm and LTerm counts are reading low (rich) as well as my O2 voltages swinging wildly from around stoich to rich.

I'm also logging a DTC 22 TPS low on every record as well. I need to check the linearity of the TPS travel to see if it's noisy, or has a bad spot in the travel.

I've verified my fuel pressure, and I've installed new injectors (hopefully this isn't my problem), All new ignition stuff from my fiasco a few months ago as well.

So after all the aforementioned drivel, can anyone take a look at my Datamaster log and see if they can spot my issue? Or refer me to another forum that might help? I've been searching around a bit and have only found very old threads for GNX's and Typhoon/Syclones, which are cool as hell, but they're all from 2003 or so.

Thanks for looking!