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Whats the issue, that the dealer didn't have what they would need, or that you dont want to take it to them? Or that you would like to do it yourself? The snap-on scanners can perform it with the right module, but dont read it right, so you have to know what they are using for their data...

Thats some good news on the turbo shaft spinning, probably a lot of guys that could benefit from that. I imagine the inside got gummed up from hot oil boiling at some point or setting a long time, dirt and dust, ect.. My GM4 wastegate lever got sticky about halfway open, so that it wouldnt...

Check the wastegate, make sure it closes all the way. Mine got sticky so that if it opened more than like 1/4" it wouldnt close all the way. Assuming its bearings were still good and the wheel spun alright.

What is slow, the truck or the turbo? Maybe you need to flip the chip to a different setting.

I have a 12 micron pre-filter water separator for years with the Walbro FRB5 and FRC10, and havent ever changed it, but I do recommend 30-micron. The fuel pressure post FFM is much lower, about 30% so with clean filter, or worse. Air in the fuel is likely, or check with a scanner what...

They are all pretty much the same turbo, and all not worth keeping! One of the best modifications is to get a larger, more efficient turbo.

I posted before that it has a 1-bar BARO sensor and a 2-bar Boost Sensor, thats what you have. NA versions would only have the 1-bar sensor. ALL 94-95 6.5 trucks have the BARO sensor, its used to calculate boost in the PCM. The non-EGR ones did not utilize the fuel derate table, even...

Less fueling at a given RPM would be the PCM performing some compensation for altitude, and the fuel derate table in the program is purely intake absolute pressure based, not boost based. My point is that what you have stated was never in question, it is understood. I was pointing it out...

The dyno runs are done with tranny in 1:1 and locked torque converter so the transmission isnt multiplying the engine output. When not locked up the engine can rev really high, but the tires are spinning slower with more force, so its deceptive, the tranny is causing the torque increase. When...

Its not that the 6.5 crowd lacks innovators, its more that it has so many doubters that say thats all its good for, and you can't do any better. And when theyve rebuilt or swapped a half dozen or more engines in their own trucks its probably reasonable for them to have this attitude. GM made...

Thats why we've been discussing the transfer case and the speed sensor reluctor wheel in it :thumbsup:

Your 94 should have a BARO sensor on the firewall, driver side, with its port open to atmosphere. The emissions trucks with EGR also used it for EGR control, verifying vacuum levels. The 2-bar sensor doesnt seem to have any trouble reporting all the way to 30psi (just past 2-bar), and tracks...

Im not even sure which transfer case you have, this is an easier to see picture, with two snap rings and the "VSS wheel". http://www.rsgear.com/technical/diagrams/ep-diagrams/new-process-241-transfer-case-chevy.aspx

The bad consequences is what has been discussed in this thread

Does the shaft in the tranfer case move back and forth at all when you slide it onto the tranny output shaft or push in the driveshaft? I've never dealt with one. Check this out...

It sounds like the speed sensor is not picking up correctly. Did you give them the whole tranny, including the transfer case? If so, maybe they didnt line up the gear teeth on the output shaft right with the sensor, or put the wrong one in, like a 20 tooth ring instead of 40, since its reading...

The purpose is to fool the PCM into not knowing how to accurately gauge its fuel rate commanding, so that you get more fueling off the line. Its not necessary as it could just be programmed to do that. And it has other consequences, that its not really worth messing with. The reverse bump...

The sensors dont have altitude correction, they just read lower voltage at lower pressure, just like vacuum. The correction would come in the calibration of fuel and boost in the PCM program. To adjust those parameters based on MAP input. Technically the BARO sensor is another MAP on 94 and...

I have seen 10,000 mile use and 30,000 mile injectors look and spray terrible, and several people have bought new or rebuilt injectors that spray bad. So, I would recommend at least testing some of the injectors easy to get to and then decide if to replace all of them. Any diesel shop should...