ShayMK

Hey guys I have a S5 motor in my FB and the standalone ecu is fucked. I can't afford a new one so thinking of going with factory ecu/wiring.

The motor is S5 but has S4 parts (was running an s4 ecu with previous owner) so I'll be getting an s4 ecu.

So here's the question, I already have the FULL S4 harness (**** SHOW), what would be the easiest way to go about this? Is there some sort of write up that has gone through this maybe?

I looked through the wiring manual for the 88 and it really sucks to understand what each ecu plug does not like the '91 manual.

I have all the wiring sitting in front of me right now in a huge clump, but not too sure how to start.

Thanks for any help

HOZZMANRX7

iTrader: (43)

punt

rx-7 obsessed

do you know if the sensors are s4 or s5 or all swapped for the stand alone there are several ways honestly the easier way is save some money otherwise it could be swapping sensors playing with harnesses or who knows whats been hacked to **** so the dash works ect,

rx-7 obsessed

basically save some money and get a stand aloe to re place what ever you have in the car currently its way to much work to down convert back to stock after that much work has been done , what type of ecu is it

ShayMK

Oh?...


Thanks for the input so far, It's a Wolf 3d V4 ecu in there currently. I've ripped out/re checked the wiring several times, re-soldered all connections I wasn't happy with, double checked grounds and power and I'm only getting spark on T2. I've searched for days, found a couple threads that had almost the same issue but turned out being a wire that wasn't grounded or they weren't using the FD ignitor. Also posted a thread in the wolf 3d section for help but of course nobody will bother.

I'm almost certain the Ecu is fried, the guy I bought the setup off of said it was running exactly the way I have it wired. the stupid thing is, for the ignitor, he didn't have the connector for it, so he crimped separate connectors for the wires and plugged them into the ignitor (connectors were burnt when I pulled them out). So I'm thinking the (-) side of the coil touched one of the ignition outputs from the ecu (possibly more than one output). What I found awesome was it states in the manual probably 20 times in big bold letters, DO NOT CONNECT ECU DIRECLY TO COILS, ECU DAMAGE MAY OCCUR.

I really wish I could afford another one and put it straight in but with the way my job is right now it'd take me at least 2 months to be able to afford it, as pathetic as it sounds.