Civic engine swap
- Thread starter Penguine
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yea, your first problem is this is the wrong forum...
you'll get more help in the right area
you'll get more help in the right area
is this a stock motor for a stock motor?
if so take all sensors etc off of your motor and put them on the new motor...
no issues...
if your car has DPFI and the new car has MPFI then you should also swap the intake manifold if you aren't concerned with horsepower etc...
if you are doing this swap for performance let me know and we can work with that...
if so take all sensors etc off of your motor and put them on the new motor...
no issues...
if your car has DPFI and the new car has MPFI then you should also swap the intake manifold if you aren't concerned with horsepower etc...
if you are doing this swap for performance let me know and we can work with that...
first off, need to know model of the 91 - is it CX with D15B1 engine or DX with d15B2 engine? how about the model of the 92? is it a DX with D15B7 engine, CX with D15B8 engine or VX with D15Z1 engine? makes a difference on what all you need to do
you will need to decide whether you want to change the engine over to OBD0 to match the 91 car or change the car over to OBD1 to match the 92 engine - OBD means On Board Diagnostics, controlled by the ECU (Electronic Control Unit or computer)
there are a couple of things you will need to do in either case - you will need to remove the engine harness from your 91 engine and install it onto the 92 - harnesses are not interchangeable - the 91 has Dual Point Fuel Injection (DPFI with 2 injectors) - if you want to run the Multi Point Fuel Injection (MPFI with 4 injectors) from the 92, you will need to do the DPFI to MPFI wiring changes to the 91 harness, which consists of adding wires for the 2 additional fuel injectors, adding wires for the Cylinder sensor in the distributor and swapping the fuel injector connectors from the 92 harness onto the 91 harness (you won't need injector resistor box) - if the 92 engine is the D15Z1, you will also need to add wiring for the VTEC - you will need to remove the engine mount on the driver's side end of the 92 and remove the mount from your 91 block and install it onto the 92 block - the OBD1 92 engine has the cooling fan switch on the thermostat housing - your 91 has the cooling fan switch on the back of the block - you will need to remove the connector for the switch from the 92 engine harness and install it on the 91 harness - this will require extending the wires so that the will reach the thermostat housing - depending on the engine type, the 92 may have the MAP sensor on top of the throttle body or it may have it on the firewall - the D15B7 and D15Z1 have it on the throttle body - the D15B8 has it on the firewall like it is on the 91 - if the 92 engine has the MAP on the throttle body, you will need to extend the wires on the MAP connector that is at the firewall on the 91 and plug it into the one on the throttle body - depending on the models of the engines, you may have a little exhaust work to do
in addition to the above, in order to run the engine as OBD0 with the MPFI, you will need a 88-91 CRX/Civic Si PM6 OBD0 ECU - you will need a distributor from 88-91 CRX Si/HF or from 88-91 Civic Si or from 90-91 Civic EX
in addition to the above, in order to run the engine as OBD1, you need to purchase a OBD0 to OBD1 ECU jumper harness from someone like Rywire - you need OBD1 ECU that matches the 92 engine - you will need to swap the distributor connectors from the 92 harness onto the 91 harness or get a OBD0 to OBD1 distributor jumper - you will need to add wiring for the 4-wire O2 sensor
depending on the engine models, you will need to work out the vacuum line routing
you will need to decide whether you want to change the engine over to OBD0 to match the 91 car or change the car over to OBD1 to match the 92 engine - OBD means On Board Diagnostics, controlled by the ECU (Electronic Control Unit or computer)
there are a couple of things you will need to do in either case - you will need to remove the engine harness from your 91 engine and install it onto the 92 - harnesses are not interchangeable - the 91 has Dual Point Fuel Injection (DPFI with 2 injectors) - if you want to run the Multi Point Fuel Injection (MPFI with 4 injectors) from the 92, you will need to do the DPFI to MPFI wiring changes to the 91 harness, which consists of adding wires for the 2 additional fuel injectors, adding wires for the Cylinder sensor in the distributor and swapping the fuel injector connectors from the 92 harness onto the 91 harness (you won't need injector resistor box) - if the 92 engine is the D15Z1, you will also need to add wiring for the VTEC - you will need to remove the engine mount on the driver's side end of the 92 and remove the mount from your 91 block and install it onto the 92 block - the OBD1 92 engine has the cooling fan switch on the thermostat housing - your 91 has the cooling fan switch on the back of the block - you will need to remove the connector for the switch from the 92 engine harness and install it on the 91 harness - this will require extending the wires so that the will reach the thermostat housing - depending on the engine type, the 92 may have the MAP sensor on top of the throttle body or it may have it on the firewall - the D15B7 and D15Z1 have it on the throttle body - the D15B8 has it on the firewall like it is on the 91 - if the 92 engine has the MAP on the throttle body, you will need to extend the wires on the MAP connector that is at the firewall on the 91 and plug it into the one on the throttle body - depending on the models of the engines, you may have a little exhaust work to do
in addition to the above, in order to run the engine as OBD0 with the MPFI, you will need a 88-91 CRX/Civic Si PM6 OBD0 ECU - you will need a distributor from 88-91 CRX Si/HF or from 88-91 Civic Si or from 90-91 Civic EX
in addition to the above, in order to run the engine as OBD1, you need to purchase a OBD0 to OBD1 ECU jumper harness from someone like Rywire - you need OBD1 ECU that matches the 92 engine - you will need to swap the distributor connectors from the 92 harness onto the 91 harness or get a OBD0 to OBD1 distributor jumper - you will need to add wiring for the 4-wire O2 sensor
depending on the engine models, you will need to work out the vacuum line routing
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you can do that and that would be the easiset - still need to change mount and extend cooling fan wires
you also need to swap exhaust manifolds, since your CX uses the close coupled cat
