i have a 93 prelude si that all of a sudden died on me on my way to work. i have been throwing parts at this thing and nothing seemed to work. so far here is a breakdown of what i tested and did to the car.

i replaced the main relay with one from a junk yard
replaced the fuel pump
replaced the coil
replaced the distributor
checked all fuses

checked to see if i had voltage at the MAP... nothing
checked to see if i had volatge at the TSP... nothing

frustrated that the fuel pump would not run for two seconds and the car would not fire i came across this post.

honda civic ecm test
http://www.askmehelpdesk.com/c...19451

the guide said to unplug the D connector from the ECM and test for voltage. upon keying the car over to test for voltage my fuel pump ran for two seconds and the chheck engine light stayed on. i tested the pins on the ECM and found they had 5V.

i then keyed the car over and it stays running. but really rough.

as soon as i plug the D connector back into the ECM the car shuts down again.


ANY IDEAS???