Spark problem or fuel problem?

[bartsau]

Originally Posted by Evgeni

A reduced pulse width suggests that the computer is controlling it. Can mean that it is doing this because of the information that it is getting i.e from a sensor. Do you know if it is happening on all injectors?

It appears to be doing it accros both banks. But besides that I can't log down to an individual injector. At least I am pretty sure I can't. The way it is doing it I feel it is sensor related as it is pretty consistent. I have tried a couple of slightly varied tunes through the quaterhorse to no luck. Same thing regardless.

[baboon]

Just a wild guess, its not something silly like you've got your LHS bank O2 sensor wiring swapped with your RHS bank O2 sensor?

[bartsau]

Originally Posted by baboon

Just a wild guess, its not something silly like you've got your LHS bank O2 sensor wiring swapped with your RHS bank O2 sensor?

I wish it was/is but at the moment it is back to running standard oxygen sensors and wiring so definitely can't be that.

Thanks for the thought though

[bartsau]

So after being in the shed for a week or so without running this is what it was doing....since the problem has started it has been doing this sometimes on startup. But it seems now it is permanent :(

The second start up was with a bit of throttle although it really was not liking it :/

Any ideas?

[baboon]

Just saw the video, it does seem like a spark problem, but who knows...

Im not sure what drives the ignition timing in AU3 V8, but I assume the ECU takes the crankshaft position sensor and camshaft position sensor signals.

FTe342 did suggest camshaft sensor, but as a test if you havent already done this, unplug the harness to the camshaft sensor and run the car again like in the video. If problem still exists then it may not be the cam sensor... But if it runs ok then maybe its a cam sensor issue?

Good luck.

[bartsau]

Originally Posted by baboon

Just saw the video, it does seem like a spark problem, but who knows...

Im not sure what drives the ignition timing in AU3 V8, but I assume the ECU takes the crankshaft position sensor and camshaft position sensor signals.

FTe342 did suggest camshaft sensor, but as a test if you havent already done this, unplug the harness to the camshaft sensor and run the car again like in the video. If problem still exists then it may not be the cam sensor... But if it runs ok then maybe its a cam sensor issue?

Good luck.

Thanks for the thought Hadn't even considered doing that but is an awesome idea!