Mongo

What if that is the case? Maybe it's a mystery thing with the EZK and/or CPS? It couldn't hurt to get a new crankshaft position sensor and use another EZK.

SQLGuy

What accounts for the index spike from the CPS? Is it a missing tooth, a differently-shaped tooth, or a pin?

I'd have a hard time imagining a missing tooth spontaneously regenerating, but a pin could have fallen out....

John Speake

As I said earlier in this thread, a gap in the teeth at the reference point gives the larger pulse. The "sine wave" is the other 58 teeth passing the CP sensor.

It seems very strange how the sine waveform Stuart measures is OK, but no sign of the gap...

stuartph

I will re do the CPS test again to be sure

Looking at page D28-11 in the WSM , the EZK plug pin holes facing, wires coming in from the left MY90 pin 18 lower and pin 35 upper is the start from the left, is this correct as i want to make sure i have correct way round of reading pin numbers

23+ and 6- are the ones i will be testing

John Speake

That's correct..... #6 is the ground. (-ve).

There are 60 teeth positions on the flywheel. 58 teeth and a gap of two teeth. At a cranking speed of ca 60rpm, you should get one big pulse every second. And of course "sine pulses" every 10th of a second.

stuartph

I took this short video of the CPS sine wave, sorry about the poor quality

http://www.youtube.com/watch?v=Ie-uZ1eJ6Io

John Speake

The 'scope seems to have problems trying to synch, there isn't much evidence of a larger reference pulse, but I'm not sure your 'scope is up to the job.

The CPS may be OK..... if it registers all the teeth then it can hardly fail to register the gap. You could get Adrian Clark to test your EZK in one of his cars.

stuartph

Its alive and running, i've put in another EZK ECU and it fired right up

Thank you to everyone who helped and posted

Now i can strip out the trim, clean off glue etc and get it ready for a roll cage and recaro profi XL seats

Mongo

Wow so it was the EZK afterall? That is something unusual to fail. These cars never cease to amaze me.

AO

Wow thanks for the update. Rare failure for sure...

VehiGAZ

For those keeping score, I was wrong again...

Mongo

Cough up the booz man!

stuartph

Guys


It sure is an odd failure, i did enjoy all the tests i carried out and the WSM is a must for everyone who has one of these great cars, i will say putting the key into the ignition wasnt a nice feeling of will it go or wont it

And once again thank you to everyone who posted help and advice