No Crank Trigger / RPM - New Installation Configuration

[Tony C]

Hi guys, been a while since i posted,
got a prob with my setup, (here we go again they say)
Convereted to wasted spark (thanks to dnb's help on the msq) but we went to fire her up for the first time today and while cranking got no rpm signal being detected in MT,
and nothing on the timing light,
i have the config from the ecu on the laptop and will upload later once its charged up,
any other info you need?
my firmware version is 1.0.73

[Tony C]

here is the config from the vems,
http://www.capriracing.co.uk/vems/config.txt

And the .msq
http://www.capriracing.co.uk/Zipfiles/4.6v8.zip

[[email protected]]

First things first, if you put a DVM on AC and put the probes across the VR and Ground pins (EC36-pin26 and EC36-pin27)
When cranking you should see 100 to 200mV

[Tony C]

ok mate will check that tomorrow as the car is 15miles away in a workshop :-(
any other tests i can do? while i am there?
if there is or isnt that reading?

cheers for the reply Rob.

[dnb]

The "angular width of tooth" looks to be 0.00 on your config.  It should be 10.0

I suspect the change of firmware version between my car and yours has caused this to reset...  This should get you some RPM...

Then you need to calibrate "TDC after the trigger" (currently 80.0) to what you need so your crank advance reads right on the timing lamp.

[Tony C]

cheers Dave,
what should angular width of missing tooth be? as that is also 0 i just noticed.

Then you need to calibrate "TDC after the trigger" (currently 80.0) to what you need so your crank advance reads right on the timing lamp.

this is the value i change to get the timing light to flash at tdc while its cranking over yeah?

[Tony C]

Also has any other settings changed from when you sent me the msq mate?
like knock settings etc.
I had to use a spark map from a friend as the spark hex table was blank when i opened the msq from you.
i will get there in the end :D

[dnb]

They love to change the names of things in the MSQ files don't they... ;) 

When we both use the same firmware it will be a lot easier!!

[Tony C]

well changed the settings in the msq as advised by dnb, and did the test as per rob suggested,

got no reading on the DVM while cranking mate,

if you set the DVM to volts and check across the pins you get 4.40 (ish) volts with crank sensor disconected, and 0.18 volts with it connected,

any other ideas?
i have the ecu here with me now in case you needed me to check the board for anything that may be missing etc,

cheers for the help as always guys,


Shot of the front and back of the board incase theres something missing,
is that the ignition drivers with the silver backs?
If so should i not have 8 of them?

[Tony C]

just reading about on the vems wiki,
should i have any jumpers on these pins?

[dnb]

You only need 4 ignition drivers for the coils since you're running wasted spark.  You have 6, so not a problem.

Not sure where to go on the crank sensor yet...  Will have a think!

[Tony C]

ok m8 thanks,
this is all thats stopping us from driving the car now and running the new engine in,

[Tony C]

i gather i dont need anything on them jumper pins then?

[[email protected]]

I guess I wasnt clear when I said about the DVM test, this needs to be measured with the plug removed from the ECU - so we can read what voltages are being generated by the VR sensor.

What trigger type was your previous distributor setup?

[dnb]

If I remember correctly it was a Hall effect output from the dizzy. 

Tony - unless you've converted the ECU to VR (will post link to instructions when I find it), the chances are the trigger is not actually getting in to the ECU.  What circuitboard version do you have?  Is it 3.2 3.3... etc?