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- 5,631
- Location
- Sydney, Australia
After 6,000k's of reliable running the 1UZ has decided to do my head in, again!
There have been no changes made to the wiring or work in the engine bay in the last 6 months.
Over the last 2 weeks the car will fire up and run well for a few minutes then just stop.
Fortunately each time it has stopped it was still on my driveway so I can get it back under cover, as it doesn't have a roof.
It still has fuel pressure (it has a gauge on the fuel rail) but it also has 12v power to both pins of the injector clips.
Now I know there should be power on only 1 pin of the injector clip and the earth is activated by the ECU to make the injector function, but why is there power to both pins?
Obviously there isn't power to both pins when the engine is cold or it wouldn't start.
There's 12v power at the igniters as it should be.
I've checked all connections in the engine bay and haven't found anything loose or astray.
The spark plugs look good and no sign of running rich, as I thought it may be flooding for some reason before I found the power at the injector clip weirdness.
The last time I drove the car I gave it a pretty good flogging and it was running really well.
I can borrow another ECU to test it isn't ECU driven but my ECU was serviced and checked by a very competent workshop. I don't expect a change of ECU to solve the problem.
I'm open to suggestions.
There have been no changes made to the wiring or work in the engine bay in the last 6 months.
Over the last 2 weeks the car will fire up and run well for a few minutes then just stop.
Fortunately each time it has stopped it was still on my driveway so I can get it back under cover, as it doesn't have a roof.
It still has fuel pressure (it has a gauge on the fuel rail) but it also has 12v power to both pins of the injector clips.
Now I know there should be power on only 1 pin of the injector clip and the earth is activated by the ECU to make the injector function, but why is there power to both pins?
Obviously there isn't power to both pins when the engine is cold or it wouldn't start.
There's 12v power at the igniters as it should be.
I've checked all connections in the engine bay and haven't found anything loose or astray.
The spark plugs look good and no sign of running rich, as I thought it may be flooding for some reason before I found the power at the injector clip weirdness.
The last time I drove the car I gave it a pretty good flogging and it was running really well.
I can borrow another ECU to test it isn't ECU driven but my ECU was serviced and checked by a very competent workshop. I don't expect a change of ECU to solve the problem.
I'm open to suggestions.