My 3.0 V6 is going straight into restriced performance mode and I've tracked the problem down to the throttle body butterfly valve which is not staying open.

I've bench tested the throttle body and it works just fine and the sensor is within spec. I measured the resistance across terminals 1 and 3 and it's 650 ohms.

My next port of call was to swap the relay with another and the problem is still there.

My question is about the output from the relay, is this supposed to be a constant battery voltage or is it just instantaneous which mine is?

any help is very much appreciated?

 

If it says restricted, you are trying to defeat the car which is desperately trying to protect itself. If you succeed you will likely severely damage your engine!

Find out why it's going into restricted. Have you used OBD? If not, do. If you have, post lots of details. Or find a good tech who can diagnose what's wrong.

Please realise this is not a car from 1970 or 1980.

 

I am not running the car at all, I am going through the full manual, accurate and hands on diagnostic procedure !!!!!!!

It cut out straight away because the engine is completely starved of air, I recognised this straight away!!! The codes are totally irrelevant, the fault is with the throttle body butterfly valve not staying opening, that's why I asked if the voltage was supposed to be instantaneous!!! The OBD will throw up multiple fault codes because of this and the only way of pinpointing the problem is not reading fault codes but to run through an exhaustive series of tests !!!!! Fault code readers don't come up with the magic answer but a multimeter and studying the circuit diagrams and fault finding procedures usually do!!!!!

 

Any time you tell a partial tale you can expect to get a partial, maybe useless, result. Garbage in, garbage out.

 

What partial tale?

 

You only provided brief details first time, then far more. I called the first lot partial.

Is the PCM actually commanding the butterfly to stay open, even if only slightly? Obviously you must have already checked that but something doesn't add up or the engine would be running OK.