I was driving along then my car died. After looking around under the hood I checked the fuses and the ecu fuse blew. I tried to replace it and it blew again. I searched the archives and tried everything that everybody has suggested previously. I changed the PGM-FI relay, and swapped out ecus. I havn't added anything to my car in awhile. A couple days before I turned down the fuel pressure regulator. Could that cause something to mess up? I turned it down to 35psi. I also check wiring around the ecu and around the primary O2 sensor they all checkout ok. I have a 98ex / B16a2. I didnt get to check the secondary O2 cause its been rainying. Any ideas?
Thanks

 

check grounds...u have a short somewhere prolly

 

exactly.......blown fuse = short somewhere...........trace all yoiur wireing...it's not your fuel pressure it's electrical.......somwhere you have short...fix it and problem solved

 

I dont think I will get to work on it till monday or tuesday. I'm working my crx this weekend. Swapping a zc motor in it. Can a fuel pump cause that ecu fuse to blow? I was looking at the wire diagram from the helms and it doesnt look like the O2 sensors could cause it to blow that fuse, but someone said that was causing his problem. So I'm guessing if a O2 sensor could cause it to blow. Could anything wired to the ecu cause it? Looking at the wire diagram it looks like it is only there to power the relay.

 

I finally fixed it. I had to run a wire from the yel/blk wire on the PGM-FI main relay to the ecu (connector A pins 11 and 24), to the yel/blk wire on each injector, then to the yel/blk wire on the evap purge control solenoid valve, to the yel/blk wire on IAC valve, finally to the yel/blk wire on the primary O2 sensor. I could not find a yel/blk wire on the secondary o2 sensor, My CEL should come on but it hasnt yet. Does anybody know what color wire I am suppose to hook up? The book I have says the wire is suppose to be yel/blk also but I couldn't find it.