Repair manuals

[DB559]

Looking for opinions, I have a 1990 MM with a 1994 2.4 motor in it. I’ve been manual shopping (factory manuals) I guess my question is, should I get both volumes for each year or should I just get the engine/chassis manual for 94 and electrical manual for 90? Any experience would be appreciated.

[MrPaco]

This doesn't answer your specific question, but in case you haven't seen this, there are lots of manuals available for download here:
http://www.mightyram50.net/vbulletin...-Manual-inside

If you're not sure of which engine you have, geezer101 seems to be an expert at identifying them, if you provide a few details. Hopefully he'll see this and can help you out.

[geezer101]

Not me. Later trucks aren't my speciality. I do recall something about the 90 truck having a different ECU and some ancillary hardware that wasn't used in other year builds and it caused headaches...?

[pennyman1]

I saw this question on facebook - I suggest looking at the wiring around the ECM to see if it has 2 or 3 plugs, and if the wires are spliced on the ecm plugs. Since the engne and ecm would have needed to be swapped, it is a matter of determining if they swapped the engine harness with the motor, or spliced the correct plugs to use the 94 ecm