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[Omega_Dan]

Not sure if this is connected to my other problems but the cars been really struggling to start on these cold mornings.  I turn it over for about 5 seconds, stop, do it again, then on the 3rd time it slowly comes to life. Any ideas what it could be?

Possibly the crank sensor?

[Elite_L0ver]

Not sure if this is connected to my other problems but the cars been really struggling to start on these cold mornings.  I turn it over for about 5 seconds, stop, do it again, then on the 3rd time it slowly comes to life. Any ideas what it could be?

Sounds like your starter Motor mite be on way out or have a dogey earth connection somewhere or battery low do a battery test or a drop test on both battery and altonator

[dan-eboy]

Thanks, why would the crank sensor cause this?  And what voltage should the battery and alternator have, is it 12v and about 14v for the alternator?

[Elite_L0ver]

Thanks, why would the crank sensor cause this?  And what voltage should the battery and alternator have, is it 12v and about 14v for the alternator?

Not sure about crank sensor but

Battery about 12.5v

Altonator about 14.2v ish

[dan-eboy]

Thanks for the reply i'll go and check them now!

[The Red Baron]

Thanks, why would the crank sensor cause this?  And what voltage should the battery and alternator have, is it 12v and about 14v for the alternator?

Not sure about crank sensor but

Battery about 12.5v

Altonator about 14.2v ish

have a look here.
http://www.omegaowners.com/forum/index.php?topic=90619.0

[dan-eboy]

Thanks, the alternator is a bit difficult to get to especially in the dark!, But the battery is reading 12.6 volts so can't see it being a problem with the batt or alternator.

Does anyone know where the Earths are?  I have other probs too and wonder if a good cleaning of the earths wouldn't help.  I've had a look with my torch but to no avail!

[TheBoy]

Sorry, just seen this.  Pre 1998 ECUs are Motronic 2.8.1, post 98 are Motronic 2.8.3 (DBW are Motronic 3.1.1).

I, like others, doubt its the ECU.  Very expensive to change parts willy nilly, and can add other faults which cloud the diagnosis.

[dan-eboy]

Oh well i have an Ecu on the way with ECU, Immobiliser ECU and chip, thanks to Robert, I think it's from a 99, will it work?
Well I've changed plugs, leads and coil, I really don't know what else it could be now? Thanks

[dan-eboy]

WOOOHOOO!    The car is now running properly - Despite many people saying 'i doubt it's the coil pack' I changed it and hey presto!  So pleased , thanks everyone for their advice and big thanks to Lincs Robert for the cheap ECU.  Only thing is now one of the instrument panel lights (right side) has gone so can't see how much fuel i have when it's dark!  Prob just a fuse popped when i plugged battery back in ill look in the daylight tomorrow.  Thanks All 

[omega3000]

WOOOHOOO!    The car is now running properly - Despite many people saying 'i doubt it's the coil pack' I changed it and hey presto!  So pleased , thanks everyone for their advice and big thanks to Lincs Robert for the cheap ECU.  Only thing is now one of the instrument panel lights (right side) has gone so can't see how much fuel i have when it's dark!  Prob just a fuse popped when i plugged battery back in ill look in the daylight tomorrow.  Thanks All 

Nice one , glad you got it sorted in the end 

[TheBoy]

WOOOHOOO!    The car is now running properly - Despite many people saying 'i doubt it's the coil pack' I changed it and hey presto!  So pleased , thanks everyone for their advice and big thanks to Lincs Robert for the cheap ECU.  Only thing is now one of the instrument panel lights (right side) has gone so can't see how much fuel i have when it's dark!  Prob just a fuse popped when i plugged battery back in ill look in the daylight tomorrow.  Thanks All 

Blown bulb


As to ecu fixing, see if the running goes rough in a few days/weeks.  Given the haphazard diags, I wouldn't be surprised if the ECU BLMs were well out, rather than an ECU fault.  If there is still an underlying problem, the BLMs will drift again.

[dan-eboy]

What are BLM's? Is it easy to change the bulb or is it a dash out jobbie?

[TheBoy]

What are BLM's? Is it easy to change the bulb or is it a dash out jobbie?

Block Learns. Basically, the ECU constantly tweaks itself for your specific engine characteristics, and stores the tweaks. Over simplification, but you get the idea.

Dash out. Only 5 min job. Replace all the illumination bulbs together, as chances are another will blow as you disturb it all. Unless you really like the job

[dan-eboy]

Cheers mate ill replace them all -spent enough time messing with cars this last month!  The old ECU did have corrosion on about 6 of the lower pins and i think some had almost joined together which might of been shorting it out.  I forgot to take a pic but i will tomorrow so people can see.