Hey Guys I found a replacement engine for my car but the guy says its from an auto. My question is Whats the difference between an engine from a auto trans and a manual trans car ? oh the car is a 1999 Honda civic ex

-Thanks

 

nothing

 

I believe the idle air control valves are different between auto/manual on 99-00 cars.

The automatic will have a flex plate rather than a flywheel. Beyond that, I'm not aware of anything.

 

really? huh... then again, i've never really looked into automatics... will it make that much of a difference so long as he has the right computer?

 

ok well i have a manual so i can swap everything over to the auto engine, I wasnt to sure if i had read somewhere that the intake or egr is different? i'll just have to see when i have the engines side by side

 

Oh yeah, computer too. Forgot about that.

I remember reading somewhere that you have to repin the IACV from 2 wire to 3 wire or vice versa. Don't know for sure, I've never done one of these. Maybe it's possible to just swap the IACV from the manual engine.

 

automatics have 3 wires

 

so all u have to do is re-pin or re-wire the IACV and throw the flywheel and clutch on the new motor.

u can run the Automatic ECU with some modification though

 

Just swap the IACV. It's harder to screw up.

Converting the ECU involves clipping one resistor and replacing one with a regular strand of wire. It takes longer for my soldering iron to heat than to open it, do the work and close it back up.

 

Intake manifold is different, also throttlebody and IACV. Simply reuse your old stuff. Reuse your old IACV. So far as i'm aware you can't convert OBD2 ECUs from automatic to manual. You could do the OBD1 versions very easily in the way that thumper64 has stated.