Bambam7

I've found the problem why the car won't start (no spark/fuel)
With the 2I pin (5 volt feed) unplugged from the ECU, I get the 5v signal from the ECU!! It's still good!
There is a ground out on the car side of the harness though. That's why the coild aren't firing.

There is a ground-out on the 5v Vref signal that feeds all the sensors form the ECU.

Now I have to go through the entire circuit and try and find the groundout.

Ok- Now I need to know (I'll try and follow thr wiring diagrams...) what are ALL the sensors, etc that the 5v signal feeds???

Is it the same brown/wire throughout the entire circuit??

Bambam7

One more thing- does anyone know where the grees/white wire that comes from the ECU splices off to become the brown/white?
Just like some info before I start cutting into the wiring harness.
Thanks!

HAILERS

All I see is the TPS, BOOST SENSOR, ATP SENSOR, AFM and if you had a series four, the variable resistor.

I'd suspect the boost sensor first, afm second, tps third and last the ATP sensor.

EDIT: I'd bet that a car would start without the tps, atp, and boost sensor plugs off (also variable resistor if you had a series four).

J-Rat

iTrader: (2)

I believe the car will start minus the boost sensor.

Jarrett

Bambam7

I'm not so sure if it's a sensor- Could be a wiring thing.
Well- off to check those now! Update soon...

NZConvertible

S5 atmospheric pressure sensors are inside the ECU. The MOP position sensor also gets 5V.

Terrh

iTrader: (7)

I'd be willing to bet that you'd have a hard time making a car run without the AFM.

Bambam7

Supposedly you won't get spark if the AFM is disconnected.

Didn't know the OMP gets 5v...
The factory manual ECU pinout is pretty cursary when it comes to testing the omp circuit.

I'm leaning towards the OMP thing.
I've replaced it though, and still the same problem.

Why do I lean towards that circuit?
1- The resistors that were fried inside my ECU go to the OMP pins.
2- WHen I took off my old OMP, the o-ring gasket had a bad burnt/melted section!!

I have to check continuty in that circuit, and also look for grounding and such.... has to be tomorow morning.

HAILERS

***S5 atmospheric pressure sensors are inside the ECU. The MOP position
sensor also gets 5V. ****

I'm at work with no resources available to look at series five (crutch). In that case, I'd say I'd start with the OMP and then the other items. Were you not washing in that area??? Something like that. Ya shoulda bought a series four. Trouble free series.

No spark with the afm disconnected??? I have trouble with that idea. I'll disconnect mine tomorrow and see.

If You want to save wear and tear on the starter/engine, just pull the cas and twirl the cas gear to see the spark plugs spark. Just lay the plugs near the strut tower bolts and give it a twirl. Saves a lot of wear on the starter/engine.

So, why not just disconnect all the related items and twirl the cas to see if you have spark?

Bambam7

Ya, I was just going to edit that... some people say that you won't get spark, but that's wrong. I know you do- it's just in limp mode- no advance, etc.
I've run like that, just playing around....
The OMP is definately looking at- it was the ONLY thing that got hit with water (and the turbo intake), and the thing that fried the resistors in the ECU.
I checked the wiring for continutity to the ECU last week, but I DIDN'T check for continuity against ground!
It probablyt shorted, then overloaded the circuit, buring the 100amp fuse (HOW??? on a 5v circuit??) burnt some insulation off of a wire, now making a groundout or something.
It's all speculation untill I check later.

Bambam7

Well.. got the problem!
It was a groundout on the 5v sensor signal, that's why I wasn't getting a signal at the sensors.

Why? Well- part of the wiring harness somehow fell in between the wastegate actuator, and the notch I but in the framerail. It pinched, and the 5v wire grounded out to the frame.....
So. Done!