Ecu warning light

[Jeffries]

I've just taken my ps13 for a little drive around the block as I wanted to check out how it felt after lowering. And the minute I put a little bit of acceleration the ecu light flashes up( the one next to the fuel light) This is all at 10mph. It's a fresh import mapped on a PFC. When me and mr baboon checked the plugs the other day there was signs of det on one of them? Any body got an idea as to eat it might be? Or what to check? Thanks

[folken]

det ?
The PFC has a built in knock sensor.
Maybe it's hardwired to this light on the dashboard ?

[Jeffries]

Detonation mate. Possibly? could it be the fuel difference I'm running 99 octane.

[Rubix_Cube]

Matt, get The map looked at on a dyno. Check the temp, oil pressure, etc limits on the pfc. Maybe if these are breached its flashing to warn you.

[Jeffries]

I knw I gotta get that checked but prob is I gotta get an mot first. and I dnt wanna really drive it to Greg at pro tuner when it's doin it and risk damage. Catch 22 haha. Havnt got the commander to check. Thing is it's not underload when it does it???

[Rubix_Cube]

Hmmm.... trailer it to protuner?

[Jeffries]

its over 2 and a half hours and got no trailer haha.

[Gary@APT]

find some one closer to you to sort

[Jeffries]

The closest guy will only map touring cars now already tried him? so is it just down to the tune then that im getting the light flash?

[Gary@APT]

it can flash light for det,injectors or afm,map sensor max'd

my guess to do it so low is det so either back base timing off plus run on v power till you can get map looked at

[Jeffries]

Its running the z32 airflow sensor. there was signs of det on one of the plugs so im guessing that to. will have to get it sorted asap.

[Gary@APT]

yep before you melt piston!

[Jeffries]

So much for tech arts map haha. Thanks for the help mate.

[Rubix_Cube]

Where are they? If they are a Japanese mob, it'll be mapped for MEGA high RON fuel. If I were you I'd do what the god that is Gary @ APT says about the base timing, knock the boost down wait with it when it gets MOTd to stop any of the folk at the station taking it a "road test" and then get it to your preffered mapper to get sorted. Greg at ProTuner I'll assume will do a compression test etc incase to make sure any previous Det may have caused damage.

[Jeffries]

Yea jap lot. I've only just imported and the engines a newish rebuild in Japan.So all that should be ok and I havnt blasted it once yet. How can I adjust the timing? I knw the mot guy and he won't be taking it out. Shame ur so far a way Gary I'd of brought it up to you.

[Gary@APT]

search on here for guide i think jez added it somewhere,

only thing is power fc is different to stock best thing is to measure it and what ever it is retard it 4 degrees till you checked map and tell mapper what you done

[Jeffries]

Ok cheers gary

[Jeffries]

Right the plot thickens. I've just re soldered some of the wires to the ecu as some if them were shocking. But now the ecu light doesn't switch off atall? Any ideas. I think it was a bad connection or sumthing that's why it was flashing on and off? But now stays on the minute ignition is switched on???

[Rubix_Cube]

Hmmmm thats very odd. I'll have a look at all your wiring and make sure it was sorted now.

[Jeffries]

Yea it is odd and I havnt done anything different just re soldered some joints? Is there a pin diagram for the Ps13/180sx PFC. The only thing I did was unplug one of the plugs and re connected back up cnt really see that making a difference.

[Jeffries]

Anybody else got an idea why my management light stays on?

[VIDAL BABBOON]

You need software or a hand commander mate :nod:

If the light was intermittent before and is now constantly on something is very wrong somewhere :nod:

As the PFC warns of max limits etc these are only ever displayed as a flash and none of them will constantly enable the light.

Next job is to identify what PFC you have installed and then inspect the wiring. If it's the correct PFC there is no need for any wiring to be interfered with (NOTE: Some vehicles will have to have some pins swapped about to get the PFC to work correctly, but i have no experience with the PS13 ECU or related wiring)

[Jeffries]

I'm nt sure nick. The engine isn't even turned on and it stays lit? It's got 180sx on the ecu and it's the d jetro one as it's got the z32 sensor? But mines a black top nt red so the ecu has been wired in. Some pretty dodgy stuff down by the ecu? Hope this isn't a sign of troubles ahead?????

[VIDAL BABBOON]

So it's a red top ECU converted to fit a Black top non NVCS engine.

You need the pinouts for both engines to see what changes are required to make it work then.

There must be an underlying issue somewhere!

[Jeffries]

No I think it's. Black top ecu and engine but the loom I think is for the red top? If there is a difference?

[VIDAL BABBOON]

Yes i believe the ignition loom is different from red to black!

[Jeffries]

That might explain some of the wiring. I'm stumped as to wat it could be either it's something to do with the map or a bad connection some where?

[VIDAL BABBOON]

Strange why it only came on constantly after you sorted the wiring !

Have a very close look around that area, are the breaks on the ECU loom near the ECU?

[Jeffries]

Gonna strip it all back out tomoz and hav a look over again but I dnt think so.

[VIDAL BABBOON]

Check that the pins are correctly seated in the plug and the plug is correctly seated in the ECU.

Check all earths are tight and have a good connection.

Other than that i cant help, would need the pin out chart to identify what goes to where and a multimeter and time to check they go from pin x on ECU to part y on engine etc.

[Jeffries]

Yay sounds like fun. Can't wait. Haha.

[VIDAL BABBOON]

Right then i have searched though pages and pages of tosh since finding this thread earlier lol

I have come across what appears to be a genuine link to a useful web page (at frikin last)

http://www.kouki.co.uk/reference/nissan-180sx-s13-1991-1996-sr20det-ecu-pinouts

Check that for me have i got the right engine/car/ecu lol there is also another link at the lower part of the page to the alternate engine !

EDIT:

I have also found what appears to be an incomplete swap diagram ?

http://forums.nicoclub.com/type-x-and-red-top-ecu-pin-out-diagram-t364218.html

[Jeffries]

Yea I've had a look aswell and found a full pin output diagram will try checking tomoz if they match with eat I've got.

[Jeffries]

Speaking with Greg gush he thinks I might hav boken a sensor wire some where so it's now a case of finding out wat one. Oh joy.

[VIDAL BABBOON]

Wound the CAS back a tad and light has stopped flashing :thumbs:

Guess it was advanced for map and jap fuel.

Would not advise boosting or hard driving though as i have no idea on what the map is like.

It will be ok to get to the local MOT station and pull it onto a trailer though.