KSA-Cossie

iTrader: (4)

Is this normal ? If i let it sit with ignition on for 10 secs it fires quicker .

Dave Henshall

i had similar issues to the point where the car wouldnt start.

trailored it to stus - he plugged in his pectel monitor ecu = missing crank signal. turned out to be a manky connectror for the tdc sensor. he gave it a good clean up inside and then it started like i imagined it should. this must have been plauging my car for a while but the coilpack electronics must be more sensitive then the std setup and if its not 'just right' it wont have it at all.

KSA-Cossie

iTrader: (4)

Thanks for that m8 something to try at the weekend.

Chip

iTrader: (3)

Ive also noticed that the system seems to be a little more sensitive to sensors since fitting for some reason.

Stu, is there an explanation for this?
(just purely out of interest, as opposed to because its some major problem)

Dave Henshall

i reckon (dont know) its down to the electronics. if they are digital as opposed to analogue then this would explain it. think about freeview compared to analogue tv. if the signal quality drops a bit due to weather - you loose the siganl alltogether - wheras with the old analogue reciever you'd only notice it as snow on the screen as the reception got worse....

Chip

iTrader: (3)

There must be some sort of a2d convertor in the new kit I should think, so you may be right.

Stu Or SECS will know im sure

silky16v

iTrader: (1)

is the coil-pack earthed correctly

ECU Monitor Enthusiast

iTrader: (1)

FYI, There isnt an AtoD (adc) circuit involved, its a pure digital circuit.

The coil pack board software can take upto 1 extra rev to start because
I use a double check method to ensure proper syncronisation.
(This depends of course where the engine stops in its cycle)
This prevents dangerous backfires on failure of the crank or phase sensors.

On a dizzi ssystem, when the sensors fail, the spark delivery is always correct
as the rotor arm is mechanical so will always deliver the spark to the right
cylinder (within basic limits)

On a coil pack system, the loss of crank/phase syncronisation could cause a
backfire with the inlet valve open if its not properly checked.
This was a key design feature requirement from day 1 based on my own
experiences of a crank sensor failure on the first ever prototype on my own car.

Dan

Nice one Simon, even I understand that!

Dave Henshall

exellent

KSA-Cossie

iTrader: (4)

Eh,pass ! Will check after work,should it be earthed ?

silky16v

iTrader: (1)

I do believe so yes!, but i'm not 100% sure?

the 4 fixing holes on the coil-pack has a metal band going round it, i was informed that once fixed to the chassis this gives the earth, but like i said i'm not 100% sure

KSA-Cossie

iTrader: (4)

Ah well in that case it's earthed then,thought they might have had to be earthed from battery neg.

ECU Monitor Enthusiast

iTrader: (1)

The coilpack frame only needs to be earthed for radio interference supression.
It doesnt need an earth to operate.

KSA-Cossie

iTrader: (4)

Cheers simon.

KSA-Cossie

iTrader: (4)

Replaced cps and fitted ik31 plugs and now it starts on the button.