MJBritton25

Hi, got a 1996 Impreza WRX import. A couple of days ago, the engine misfied a few times and then cut out. No check engine light appeared, no temparature anomolies, nothing.
The starter motor is turning over, but the engine wont fire. Removed a spark plug, but they are not sparking. So, I suspected crank sensor, bought one and replaced that. Still no joy. Anyone got any ideas ? Also, can I use a standard OBD sensor to get the diagnostic code if I went and bought one ?

MJBritton25

PS its completely standard apart from K+N induction kit which has been on there for about 4 yrs.

Can ANYBODY help !?!?

Aztec Performance Ltd

iTrader: (234)

There is a method of connecting some plugs under the dash that will show the fault code.

Have a search...its here somewhere.


Bob

DaveD

iTrader: (2)

Fuel pump?

You should hear it priming when the ignition is turned on. If it's not priming, it could be the pump itself or the connector under the back seat.

MJBritton25

I will check that. Would that stop it sparking tho ?

MJBritton25

Not the fuel pump.

Also, I tried to get the diagnostics to work by connecting the green plugs and black plugs together as described on Scoobypedia | Trusted knowledge for everything Subaru | Reading ECU Fault Codes browse
but it will not enter diagnostic mode. I cant get the Check Engine light on at all. I took the dash apart and checked the check engine light, as it is not even appearing when second ignition is on. Bulb is fine, but swapped it for another one just for good measure. So, no check engine light, and no diagnostics. I have no idea - Anybody ?

MJBritton25

In case anyone is interested, these symptoms point to ECU failure. In my case, the ECU was failing because the main power fuse to it had blown. replacing this got the ecu going again. Reason the main fuse was blown - one of the ignition coils had melted (obviously not the one I pulled out initially to look for a spark).

azza77

you just beat me to it. i was going to say ECU as whilst hacking mine to pieces to fit a scoobyecu it gave the same symptoms when you cut the resistor and bypass the chip.

burns

iTrader: (1)

How about MAF failure that can cause these symptoms.

scooby-tc

iTrader: (2)

almost certainly the tall pink fuse in the engine bay fuse box (80A iirc) i had a similar problem once and although when i removed the fuse it didnt look blown i put a new one in and it fired up 1st time

good luck