So Frustrated...

[Rosco]

Problem:SR won't start, turns over.Background:I have an SAFC2 wired in using the N3-b diagram (RPS13 180sx, Redtop in s13 chassis). We had the airflow wire wired into the black wire on the ECU (should have been wired into the white wire next to it). When we had it this way we pulled the ground off the MAFS (Z32) and we could get running and we messed with the SAFC2 a little. Obviously when we ran it like this with the ground off we were reading Airflow of 100%. With the ground on it read 0%, turned over idled for a couple secs and died. Basically we had it running, firing and reved, but it wouldn't stay mostly due to the MAFS wire off the SAFC2 being on the wrong wire. When we fixed the wire and tried to start it it just turns over. The SAFC2 now reads the MAFS airflow ratio correctly. Things I have checked and re-checked: 1) MAFS (Z32) I read 12 volts on the yellow wire and 5 volts on the white (signal wire) while cranking. I also have 3 Z32 MAFS that I have checked and all seem fine. SAFC2 reads the correct airflow%. 2) Coilpacks got pulled one by one and checked spark and everyone of them fires. Plugs where black and fouled from running rich the other day when we had the wiring wrong. I could smell the fuel on them. 3) Fuel was checked by removing the fuel line off of the regulator and turned over. So that shot out a nice stream of fuel. Also we used a hollow pipe to listen for each injector opening and closing while cranking. 4) Timing was reset so much I can do it blindfolded by now. I set the pulley to the second mark and the CAS was set by lining up the the rightmost dot with the mating dash or mark and slid in. While trying to start it we messed with the CAS by rotating it back and forth and manipulating the throttle at the same time. There was no change in how it sounded while rotating the CAS. 5) I have a MINES Tuned ECU, so I thought it might have something to with that. When the key is in the Accesory position the ECU light is on. When it is being cranked the blinks with the engine. I have been told that this is normal, so no codes being thrown. I tried my friends ECU (stock redtop #62) and got the same exact results. 6) Compression is definately good because the motor ran as good as it can when we had the SAFC2 wired wrong. I don't have a compression tester to give you exact numbers but the last time I did do it I was 150-165 (If I remember correctly because it was a while ago)across the board each cylinder was within a couple psi of each other. So we have fuel, compression and spark......Why isn't it firing???Is my CAS shot after one day of working?? I'm so frustrated with it right now. I have been speaking with Jeff from 240sxmotoring on and off and he is stumped as well. It's probably something retardly dumb too. Yeah, I'm definately lost.
Modified by Rosco at 1:24 AM 5/26/2006

[180fan]

pull the AFC and the mafs from the setup and see if it starts.

[da40]

i agree! try takin off the afc ive seen the same thing happen to a friend of mine and that worked must have been the wiring job on the s afc

[Rosco]

Alright, I'm gonna try that today. I'm also trying a different CAS. I really don't get it though, I mean the wiring was followed exactly as it should be. We soldered all connections, you know the whole 9 yards...Will it run on a z32 MAFS w/out the SAFC2? I was told it wouldn't....I will update later tonight.

[Rosco]

Well I removed the SAFC. I could only turn it over without the MAFS plugged in since I don't have the oem clip for the KA MAFS. Basically I had the same issue. I have heard that SR's won't start if the coolant temp sensor is bad, is this true? I'm almost at the end of all my ideas. I am contemplating towing it to Poughkeepsie where heavy throttle is and have them do some magic. The only thing is; they are 3+hours away and I don't think I would want to even see the labour charge on my issue. Well I'm done for the night. This really really sucks.

[sleepin240]

Does the car start now though without the SAFC hooked up? If so sounds like SAFC was burned up or something. Cause the SR motor will run without the Mass Air but you wont be able to rev it.

[Rosco]

Still a no start...

[180fan]

the cas should be tested then. Now that the afc's out of the loop.

[Sil80315]

I think its the Timeing :P

[Rosco]

Heheh....Thanks for coming man....I would have been scratching my head for a long time on that one. For those that don't know, Sil80 stopped by and we fond out that we had her 180 out....So let this be a lesson to ya'll. If you think its right, double-check anyway.