Does anyone know what cars came with mpi and an automatic in 88-91 and what the computer was for those cars. I think an ex did and it came with a ps9 ecu. any help would be cool and if theres anyone that know where you can reflash an obd 0 ecu would also be a great help thnks.

 

You are correct, the PS9 is from the 90-91 EX, and is a good candidate for getting chipped. There are several members on this board, including myself, who do ecu work.

 

is the ps9 for an automatic though?

 

PS9 is available in both manual and auto - you could also use a PG7 auto or PM7 auto

 

A manual PS9 is called a PM6.

 

what would be a ecu for a mpi automatic car and did all the 88-91 civics and crxs come with the same auto transmission?

 

PS9 is MPFI and auto

 

ooh good ecu for single wire vtec good luck finding one

 

actually I found a place that sells the ps9 for $90 so its an easy find he sells everything you can think of