im helping my friend do a dpfi to a mpfi he has a 91 dx hatch stock automatic.

i have searched around and keep reading on some procedures im not sure of.

so far i have this. im not sure if it will work cause his car is an auto.

all of this is from manual 91 si civic

injectors
si harness
injector box
fuel rails
91 si manual ecu i think its a p06
o2 sensor
intake manifold
throttle body
tps sensor


i think thats it.
please let me know if im missing anything else.

will this work on his automatic civic?

how do i do the wiring?

 

you need to get an ecu for an automatic and an si throttle body. u can use a auto ex ecu, that would work. it will work fine on an auto and here is the wiring for you http://www.fourthgenhatch.net/mpfi.html

ill help you out this time but next time trying searching first

 

i meant throttle cable not body

 

thanks.


i did do a search but there is just soo much extra info in each thread it gets really tiresome and difficult to filter out what is what i need vs. something else.

 

so he will need a throttle cable as well. nice.

nothing else is missing?

 

you said the automatic EX ecu wil work, that is similiar to an si manual? does it need to be moded in anyway?

you dont happen to know the ecu code do you?

 

manual and automatic ecu's are different because a auto needs the hook up for the shift solenoids and what not a manual ecu will not have them and i think it would be a pw0 or a ps9 is the right ecu

 

side other question.

which dizzy do i use if i want to switch my obd0 to obd1?
which civic dizzy will work?

 

is it just a d series?

 

You need a PS9 ecu... You're in luck because you are local and I got one... PM me if you wanna opick it up...

 

I have done this swap on my auto CRX. You will need a PS9 ecu, and you will need a throttle body with the dual throttle wheels for the kickdown cable. You can find both these items from a 90-91 Civic EX auto. Everything else is the same. I recommend using the above mentioned guide for the swap, its well written.

 

thanks guys.

i agree that the guide is very well written and has pictures.

how much is the ps9 ecu?