Superspecies Engine Swap

[deano266]

To get any sort of reading the air temp sensor is disconnected. With the air temp sensor connected it won't allow me to clear the code. It is almost like having a phantom sensor. I have checked against the wiring diagram to pin number and all the sensors are in the correct place.

 

What would be the best way to check the voltage across it? Would it be to cut the wire and put a join in it or would I be best off rewiring the whole sensor wire?

[AndyW]

You can check resistance across the terminals of the sensor with the plug disconnected. To check the voltage with it connected you can sometimes get a thin probe into the wire entry point of the connector to reach the metal terminal. If not, in the past Ive pushed a needle through the wire insulation which is better than cutting it.

[geordie40]

Just a thought Alan if you need to see another MEMS result I can take mine out for a spin and send the log file for another set of comparison figures

[alanrichey]

Always happy to get log files

[deano266]

Well I have tested it and can see there is resistance across the terminals which is good. I however do not get 5v on the green black (sensor wire). I have tried it with the original wiring to earth and a new wire directly to negative on battery which makes me think that the earth isn't the issue.

 

What's the best way to repair or replace the sensor wire or could that be an ECU fault?

[deano266]

I also have a discrepancy between the rev counter and the live data of about 1000 rpm. Don't think this is related but if is something that you have come across before

[alanrichey]

No, at idle both the rev counter and the logging software read 1000 rpm. Are you saying there is a 1000 rpm difference ?

[deano266]

Yeah. It looks like it is an intermittent fault as I have had the car running on idle a few times and has happened twice now. Probably a loose connection for the rev counter