Urgent gotta night shift car won't start :/

That doesn't say anything about the pressure it's delivering, i'd clean the relay anyway...

 

Check the flexy pipe between tb and air flap for splits.

 

Right I'm off out to do both those ^^ I'll report back

 

Fingers crossed I've sorted it I changed the blue sensor back to my really old one and it fired up first time, I shall be paying vw a visit Monday morning and voicing my disappointment
Thank you very much for all your fantastic support

 

That's what i thought, but it didn't improve when you dissconnected it, so i discounted that....

You can test them by comparing the resistance, when at the same temperature. Or measuring the resistance from one pin to the engine block, or sensor outer metal housing, be careful tho, as at these high resistance readings your skin will effect the reading if you're touching the metal of the sensor or meter probes.

 

You can come into contact with one meter lead connection, but not both.

 

Well that's handy to know think ill try that b4 taking the new duff one back to confirm its faulty, just been out for a 15 mile run, no problems at all running sweet gotta nightshift tonight so I'm taking it to work, fingers crossed it'll start in the morning