What is the differences between these engines, CF6-80C2B1 and CF6-80C2B2?

As it is a vx engine going into a vs frame Suzuki may have used a different wiring harness to allow for differences in engine layout and the electronics fitted.
Is the engine the same age as the frame it's going into? Age differences can also affect the wiring layout.
You will need a wiring diagram for your bike and a separate one for the replacement engine. You will need the layout of the engine sensors as well.

I can only tell you to watch earlier models for transmission bell housings patterns and that computer controlled shifts on 1999 models may not have full compatibility for other years. Some bell housings used 2 bolts for the starter and some used 3.

There were differences with exhaust manifolds which generally failed and restudding while the engine is accessible would be smart. This went on for a few years.

Later 4.6 and 5.4 engines used dual overhead cams and the 1999 was a single cam engine.

You should be aware also that because engine compartments are different sizes, exhaust manifolds can be shaped differently in Expeditions as well as Mustangs of the same year.

There are also differences in 4x4 exhaust routing versus 2 wheel drive.

Finally, as the exhaust system may be different, you may run into problems where the smaller pollution controls are hung in slightly different areas to fit the different vehicle you obtained the engine from.

Sorry I can not do more for you than to say the Dual cam engine will be incompatible

If the ECUs have different part numbers, they are NOT the same...The thing will most likely might hook up to your electrical connector and mount the same, but they are different computers for different vehicles that most likely are equipped with different features. i.e. different engines, different engine controls, different emissions controls, one may have cruise control and the other not or they may be for the same engine with a different transmission, etc..

I am curious however as to how this all came about. The ECU failed from attempting to start the new engine??? What was wrong with your engine that it needed to be replaced and how did the ECU manage to fail because of an engine replacement? Was the other engine running when it was determined that it needed replacing? ECUs don't fail very often...I'd like to know what the problem is.

hi,
we have read your problem and understood that your engine is not starting now.please call a local repairman to drain all the diesel and clean the engine carburetor using petrol only.

i make it clear that the engines for petrol and diesel are totally different since the chemical combination of the liquids are also different.they are different like chilli sauce and tomato sauce.diesel cannot be used in petrol engines since they are designed to burn only petrol.i believe you have understood the facts and the differences between the engines of petrol and diesel.thank you, have nice day

No difference, same engine, it's either called an electronic fuel injection (EFI), or a multi fuel injection, usually MPFI ( multi port fuel injection).

a toyota parts person worth their weight should be able to tell you if the engines are different. you will need the vin #s of both vehicles.

no the engine is totally different. The .98 engine has a different crankshaft reluctor to fire the plugs as the 97 does not.

these are basically the same engine they just changed the came cover around that time just have an engine of newer car hope this helpful.

It makes a big difference in acceleration. When the turbo spools up you will feel it in the seat of your pants. The turbo force feeds the engine air. More air means the engine can burn more fuel and more fuel means more POWER!!

physical difference and electronics