have you fitted the earth from the battery negative to the bulkhead just behind it? this was the problem i had, getting no spark. took me AGES to find it as well

you have got an amp on the coil haven't you ?

i had a similiar problem, my car wasnt firiing up, turned out to be intermittent distibutor and trigger box faults, had them both changed and it ran fine up until the time i crashed it

did you see my reply in your other thread?

basically i'm getting no spark...and can't find the problem.

whats the problem?

it may tell you if sensors are unplugged or what not, but i think some of them may not even start to register untill the engine is fired.

this has been going on for time now mate. why don't you call out an auto electrician?

oh right! didn't realize that.

That means theres no faults then? or will it only pick up on a fault when the engines started?

you always get 31 unless you test with the engine running.
it means the sensor is getting no signal from the crank, which it wouldn't unless the engine was idling.

31 = Crank Speed Sensor or Crank Position Sensor

Says its getting no signal which would explain the lack of spark as it needs this to know when to spark.

But the actual sensor is brand new, and the wires going to the ECU are fine. And the other wire is earthed so how can i not be getting a signal?

I'm slightly confused by this.

As always, any help much appreciated :)