1996 s10 2.8L swaped into a 1994 2WD Manual S10

It will be a lot of work, your going from OBD 1 engine to an OBD 2 engine, even the transmission may not work in the swap. You really need to find an OBD 1 engine with numbers matching for a true plug and play. Or have the stock engine rebuilt. I know these engine are the pits for rebuilders but it might be your only hope.

Oh! So heres the thing, i found on market a 1994 s10 2.8L. The original engine blew and the guy wanted to swap it with a 1996 2.8L engine. He says that i only need to change all the above if i wanted to make the engine fit. The engine cranks, but wont start. How can i know if its a 1996 OBD 1? is it even possible? One last thing, i can't find any 2.8L, only 2.2L for 90's S10, but the guy says both engines are 2.8L. Thanks for the response Btw!

1996 was the first year of OBD 2. So your saying that the job has already been done but it won’t run? If so then something wasn’t done right. Has the codes been checked?

Yeah! He's out of the country rn, but he'll send me pictures of everything once he gets back next week! I've talked to a guy and he said that if the engine fits properly, I should be able to simply put a 94 (LN2) CKP into the 96 (L43) and that the Brain would recognize everything same as the wiring. What are your thoughts on that!?

I don’t think so, how will the ECM see number one cylinder to determine firing order and injector pulse width. But he might know something about doing later model engine swaps. I have never tried crossing the line from OBD 1 to OBD 2 engines.

If you're thinking about buying this vehicle, don't. A 1994 and older model is OBD I. A 1996 and newer model is OBD II. The computer control systems are completely different and not capable with each other at all. A 1995 model could be either OBD I or OBD II. Hope that helps! Jim

Hey! Why is it not as simple as, if they match, swaping the 94 ecm with a 96 one? it'll match the harness and the sensor.

Could flashing the 94 ECM be a possible route?

The 94 harness will be missing wiring and components. I doubt you will find anyone that can do a flash on something that old. Even most dealer won’t have the outdated equipment anymore. Now you might try a speed shop. They might know of a place to get one reprogrammed for what your trying to do.

Just because the wiring will plug into the ECM doesn't mean it will work. OBD I and OBD II systems are completely different. The 1994 ECM needs to have a PROM (Programmable Read Only Memory) inserted into it for it to work. You don't flash a 94 ECM. When one of these OBD I GM ECMs are replaced the PROM is removed from the old ECM and inserted into the new ECM. The 96 model is flashed, on the vehicle, using the VIN. It simply will not work. The 96 OBD II ECM also has emission control readiness monitors for smog testing. The 94, does not. The 96 ECM also monitors catalytic converter functions. The 94 does not. They are simply not compatible with each other at all! Jim

does it spark and maintain 35psi at the fuel line to throttle body?