Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: cnc-dude on 13 January 2009, 21:40:02

Title: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 21:40:02

I'm missing ignition on syl 1 and 4. Any ideas? Engine x20xev.

Title: Re: ignition on syl 2 and 3 only
Post by: TheBoy on 13 January 2009, 21:40:51

I Need to check firing order, but sounds like DIS

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 21:43:17

DIS failure.....

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 21:45:41

I have replaced the dis module with a new one. Problem remains....

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 21:46:15

Can you read the fault codes?

Title: Re: ignition on syl 2 and 3 only
Post by: TheBoy on 13 January 2009, 21:47:26

continuity between ecu and DIS?

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 21:48:42

Quote

continuity between ecu and DIS?

Would show a code hence the question  :y

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 21:50:54

Thank's for quick reply. I can start the engine on the two sylinders. The light on the engine lamp goes off when the engine starts. History fault codes are 19 and 92.

Title: Re: ignition on syl 2 and 3 only
Post by: TheBoy on 13 January 2009, 21:51:04

Quote

Quote

continuity between ecu and DIS?

Would show a code hence the question  :y

Good point, well presented  :-[

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 21:52:35

I have ohm'd the cables to the ecu, they are ok.

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 21:53:53

Cam sensor fault.....

Interesting...the DIS pack replaced is a new one?

Have the leads been checked for resitance (should be between 2Kohm and 10Kohm)?

How are you testing the spark?

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 21:56:54

Interesting, the early 2.0 ECU does not appear to check the ignition primaries!

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 21:57:45

I'm checking the spark. new leads. I've not checked the resistans in the cables, but i've cross swiched them.

Title: Re: ignition on syl 2 and 3 only
Post by: Marks DTM Calib on 13 January 2009, 22:01:06

Ok.....have you measured the resitance of the coil primary at the ecu connector.....pins 40 to dis pin 3 and pin 38 to dis pin 3....should be a few ohms (4plus)

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 22:12:43

No, thank's for the tip. I was suspecting a ecu fault, so I tried another. I could not start the car because of the "start security device" (dont kow the english word). But I had sparks on 2&3 with this one as well. The dis unit is new.

Title: Re: ignition on syl 2 and 3 only
Post by: Abiton on 13 January 2009, 22:30:09

You've tried new plugs, right?

If not, could be tracking down the outside of plugs 1 & 4.

Title: Re: ignition on syl 2 and 3 only
Post by: cnc-dude on 13 January 2009, 22:51:21

The spark plugs are new.

There are three wires to the dis module. I believe one is signal for syl 1&4, one for 2&3 and the last one is ground.

I think I'm missing a signal from the ecu. I've measured the signal from the ecu when the engine is running (on 2&3), but I was not able to recognise any problems with a voltmeter. must probably have an oscilloscope.

Is the crankshaft and camshaft sensors the only input sensors that controls the ecu's ignition output?

Title: Re: ignition on syl 2 and 3 only
Post by: Abiton on 13 January 2009, 23:28:45

Try tracing the two signal wires as they go along the cable tray that runs along the length of the engine.

We had a fault on ours that eventually turned out to be a wire-to wire short in this area.  Chafe between the CTS signal wire and injector wiring caused wire-to-wire short, and the CTS to die.  It's just possible you have the same thing going on but with a DISpack wire?

Worth a quick look maybe.  :)