Will my 2.3L engine from a 1986 245DL fit in a 1991 245DL?
Will the existing harness and computer of the 1991 be able to accept/receive all the connections from the donor 1986 engine?
Also, will the donor 1986 engine fit the 1991 automatic transmission?
Txks! Andrew

 

the 86 is a LH 2.2 fuel injection, while the 91 is LH 2.4. LH2.4 requires a CPS sensor which fits in a notch on the transmission bell housing, and does not have a hall sensor in the distributor, it also uses a different MAF/AMM sensor. I would take all the electrical things, distributor, injectors, etc from the 91 and put them on the 86 engine if you're transplanting it into a 91 car. mechanically, it should bolt right up.

 

Should I leave the 91 harness and will it agree/accept all the connections from/the the 86 engine? How about the two computers, the one under the hood and the other by the passenger's side; should I leave the ones from the 91 in place or transplant the ones from the 86?
Thanks! Andrew

 

what I said, take all the electrical stuff off your 91 engine and mount it on the 86 block, you would continue to use the 91 LH 2.4 harness and computers.

86 is in the 'ecojunk wiring' years