chiman72

Ok guys I have a 93 si w/ a greddy 15g kit running an FMU (yes my setup sucks)

My car was running fine for a while and know it just died. I had a cell for a few days before it died and when the cel would pop on my A/F guage would go crazy. I checked the dizzy and even changed out the injectors, and the MAP sensor but it still wont start. I got it started one time but when you gave it gas it would die and know nothing at all. I noticed when I was checking the fuses the 7.5 back up for the ECU was blown but still nothing after changing it.

HELP ME!

southwest2118

I don't know about hondas but on my 95 toyota you can jump some pins in the diagnostic box and it will flash out a code for the cel.

Tom-Guy

If you actually told us something, maybe we could help you out.

There's a sticky in the engine management forum about codes, and checking them. (hint hint)

chiman72

Tried to check the code but nothing poped up when I jmped the pins

Tom-Guy

Sorry, I skimmed and didn't read everything. CEL 0.

The blown fuse is the giveaway. You have something fucked with power/ground to your ECU, or the ECU itself. It might keep popping the fuse, but if the new fuse isn't blown then something else went bad.

Be careful about sticking good ECUs in there to test, you might fry them.

Get yourself a Helms manual (sticky thread where to download them in the tech section) and a multimeter and start checking for powers and grounds. You need ignition switch on to read voltage, but you can't have any power on in the system to read resistances (or else the readings are off). Poke around, see what you can figure out.

vani11aic3

not sure if they're a back up ECU fuse,
but the one under the hood, ECU fuse should be a 15

i used to pop my ecu fuse, it was because of the IAT sensor.

my guess is that u have a shortage

chiman72

sounds good, oh and the 15 amp fuse is right next to the 7.5 back up. Could my turbo timer fucked my ecu? its hooked to the ecu groud wire.