16 replies to this topic

[Sprocket]

As said before the ECU will not tell you where the problem is, those are just flagging up that something has happened, it does not mean that they are faulty, and more likely down to them being disconnected with the ignition still on. I personally don't bother looking at them and clear them from memory. ONLY look at the live data, you can then easily see if the lambda sensor is functioning correctly or not.

You need to look at the live data as follows

RPM - 850 +-25 at idle
Ignition advance - 15 +-5 at idle
Stepper position - ~25 to 45 at idle
Lambda sensor volts - ~200 to 600mv alternating high low
Manifold pressure - >500mmHG at idle
Throttle position - ~0.3 to 4.5v (closed to full throttle) (engine off) with no hesitation or notchyness in the reading
Coolant temp - >85C fully warm (open circuit -40c, dead short >120C)
Air temp - Ambient temp and maybe upto 20C more due to heat soak (open circuit -40c, dead short >120C)
Volts - >14v

If anything is significantly different from the above, there is a problem you need to find the cause, and that may require measuring the temperature with a digital thermometer to check sensor accuracies. Sensors can read out but not be 'faulty. (open circuit or dead short) mechanical/ hydraulic problems with the cooling system can prevent the engine reaching running temp, incorrect stepper tune can cause an over retardedor advanced ignition normally as a result of air leaks or incorrect throttle stop adjustment. Throttle cable adjustment could also be incorrect preventing the stepper operating correctly.

[northy]

Those errors weren't ones that were on the ECU, the crypton did a load of tests like asking if certain relays were making noises, then it asked us to start it and I guess it worked by changing the mixture and seeing what sensors changed etc. I didn't use the rover diagnostics tool, I used a crypton of some kind...
Surely the crypton would have that kind of information regarding sensible readings sensors could be giving, and checks them?
Anyway, we'll see this evening when I change the lambda and inlet air temp sensors, hopefully this will fix it!