Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: countrywoman on 31 March 2025, 17:12:05

Title: no spark
Post by: countrywoman on 31 March 2025, 17:12:05

Fuel pump works but only when cranking, its so quite! Thought it might start but no sparks, now should the fuel pump prime when ign turned on for a few secs? Will put my Snap On scanner on it to see if any codes Wed.
 Also turned over for ages and oil light still on, any trick for priming system?

Title: Re: no spark
Post by: Doctor Gollum on 01 April 2025, 06:23:31

The other purple relay controls the injector power. No power, no injection.

Title: Re: no spark
Post by: countrywoman on 01 April 2025, 09:10:13

Think thats working as could smell fuel in that case ECU would be working? I thought the fuel pump should prime like most systems for a bit when you turn ign on?

Title: Re: spark no fuel now.
Post by: countrywoman on 02 April 2025, 17:02:58

Okay now have sparks, found the plug had got knocked out of coilpack. Still not starting so D sprayed some ether in and BRUMM, BRUMM for  a few secs . Slacked the fuel line of and no fuel ,I had checked a plug and it was dry.
   So I need to know if the fuel pump should prime when ignition turned on for a few secs?

Title: Re: no spark
Post by: Doctor Gollum on 02 April 2025, 18:14:49

Fuel pump should only run when key is turned to pos.2 to prime the fuel rail and once it's running.

If the pump is running during cranking something is wrong.

Is it possible that you've swapped the injector and fuel pump wiring?

Injectors fire whenever the engine is rotating as long as the crank and cam sensor signals align.

That would produce fuel but not the running as the supply and release is backwards.

Title: Re: no spark
Post by: Doctor Gollum on 02 April 2025, 18:15:42

Forcing it to run using Ether does not, in any way constitute normal operation. And it will hate you for it.

Title: Re: no spark
Post by: countrywoman on 02 April 2025, 18:39:12

We only did that to see if it would "run" , now you say the relays are green? but these are red so have I put the wrong relays in? Part no ?

Title: Re: no spark
Post by: Doctor Gollum on 02 April 2025, 19:47:31

There are two purple relays.

One for injectors
One for fuel pump.


All the green relays are for cooling fan control and one under the dash for fuel. No one here ever said anything about green relays


The Haynes wiring diagrams are your friend.

Title: Re: no spark
Post by: countrywoman on 02 April 2025, 19:55:13

Brain fade ,yes purple. I need a magnifying glass to read it as its so fine! 2pairs of glasses then

Title: Re: no spark
Post by: Doctor Gollum on 02 April 2025, 20:05:30

Quote from: Doctor Gollum on 02 April 2025, 19:47:31

There are two purple relays.

One for injectors
One for fuel pump.


All the green relays are for cooling fan control and one under the dash for horn. No one here ever said anything about green relays


The Haynes wiring diagrams are your friend.

Fixed

Title: Re: no spark
Post by: countrywoman on 05 April 2025, 16:39:20

Checked electrickerty, all good. Turns out the original fuel pipe clip had failed in the tank, found a proper clip and did it FT.
 Started her up!!!!