rpm ref wire for lpg system

Hi
I'm fitting a multipoint sequencial LPG system to my 1998 4.0se but can't find which wire is the rpm ref/engine speed from the ecm. I've looked through rave but Can't find anything. Can anyone help?? Thanks

Mr Gorsky helped me out with a similar request - see my inertia switch wiring thread, might be worth dropping him a line?

Is it a GEMS? 1998 should be a GEMS right?

If it is...



Pin 23 on connector C505 (the black 36 pin one on the engine ECU)

Colour is listed in the book as Grey.

You'll have to make sure you set your LPG software for 4 pulses a revolution engine speed or it will read wrong.

We were talking about this on Forthbridges's thread here.

Yep THOR was 99 onwards I believe.....

Hi
Yes it's a gems. Thanks for the replies. I'll be able to finish it off now