coilpack voltage

[grantpipe]

I'm having trouble with car not running on all cylinders it uses the xsi coilpack which I replaced because it was damaged then I checked the plug on the loom for the coilpack with a multimeter . Pins 1 and 3 show a good 12.79 volts but pin 2 only puts out  0.79 volts. Should it be 12 aswell or is there a reason it doesn't.  And is there any sensors that would Cause it
cheers

[Niall]

Hmmm something not right i don't think.
From memory, pin one is cylinder 1&4, pin two is cylinder 2&3 and pin 3 is your constant 12v supply (at least this is how it is on mine which uses a xsi coil pack!) How have you been measuring the voltage on these cables?

Are you using a coil on plug coil pack like this



Or coil pack and leads like this



Both are known to break down over time but the latter is particularly bad! Im assuming this is on standard management?

[grantpipe]

yeah its the single piece xsi coil that's on it,
that would make sense because number 1 and 4 are sparking but 3 and 4 isn't and its oin 2 on the plug which is showing the low voltage , I am checking it with a voltmeter with the ignition on, should it be different when car is cranking over?

I found damage on the original coilpack so assumed that was the problem so replaced it yesterday with brand new item and still no spark on 2 and 3

and last problem is no not standard ecu runs a omex 3 dimensional system which I know is outdated but no way off checking if faulty

[Niall]

Ah. Mine runs a omex 600 and I had the exact same issue as you. Turned out to be a coil driver. Get it sent back to Omex. They are so helpful and can put it on their test bench.

[grantpipe]

yeah I had suspected the ecu may be faulty after all it is prity ancient lol
ive enquired a few places about a new 600 ecu and loom at the moment
does anybody have any advice on wheres best to purchase a omex 600 and can you buy a plug and go loom or do they all have to be made to each car
cheers

[Niall]

I bought mine direct from Omex. Have a word with them. They may do a deal on a ecu and loom
No one makes a loom adaptor unfortunately. You've got to build a new loom however you could probably just buy the multiplug from Omex and take the pins out of your old one and into that