Computer Problem - I think

[Sacony]

At the moment the computer is getting locked out. By that I mean whatever it tells the O2 sensor, for example, to do it justs locks at a certain setting. It only seems to be the O2 sensor that is doing this, have replaced them, but with no luck. Car still runs ok, but is missing a fair bit of power.

At first we thought it was the computer, but we tried the Power FC and exactly the same thing happens.

Has anybody experienced this problem?

Mechanic thought there might be a problem in the wiring loom, but this has been replaced. But in saying that the replacement loom could be faulty too.

[RB30-POWER]

Have you checked the fault codes on the ecu at all?

[Sumo]

Put an oscilliscope on the O2 sensor and measure the signal coming out of it. I doubt very much that it would be an O2 sensor though. As it really only cleans up the fuel efficiency, so it shouldn't drop your production of power all that much.

I would be checking the air/fuel/spark. Possibly your airflow meter is playing up, that will do the same thing.

Cheers

Matt

[Sacony]

The air flow meters were buggered, but have been fixed now. The ECU diagnostics have all been done, thats how we found the afm's problem.