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[prestigetravel]

Hi everybody,I am new to the forum.I have had several omegas in the past and have long wanted a facelift so recently bought one with a few problems and would now like the benefit of your help.

When you insert the key and turn to position 2 neither of the eml lights come on. The engine turns over happily but doesn't try to fire at all. Keep turning until the battery is flat and just as it struggles it's last turn over the eml with the spanner in flashes and the engine fires up!! Now it's running the traction control light and the other eml without the spanner are lit up constantly. Now it ticks over smoothly but when u press the accelerator it only rises about 100rpm. Today I left it idling for a hour and a half whilst I checked all the wiring and connectors and then turned it off. Tried to start again but again turning over happily but not firing at all until after 10 mind when battery dead again!!
Previous owner tried paperclip test and couldn't get eml lights to illuminate for test, he had it plugged into diagnostics but they couldn't get it to read, rac recovered me, put easystart in air box and car didn't fire when turned over.

I was a mechanic years ago before the advent of ecus etc I wondered if this may be either an ecu or immobiliser problem?

Any help truly appreciated.

[Andy H]

Removing the warning lights is a classic bodge to hide engine management faults. Makes it hard to do the paper clip test (or pedal trick) though.

I would check that the lamp isn't missing then try again.

When I got my 2.6 the battery was dying and it was difficult to start (but not as bad as yours).

[Andy H]

You need to use the pedal trick, not paper clip test.

What I don't know is if you can damage the diagnostics socket by trying the paper clip test on a 2.6. :-/

Pedal trick here http://www.omegaowners.com/forum/YaBB.pl?num=1189022687

[Welung666]

Paperclipping a 2.6 shouldn't damage anything. Try the pedal trick (see below) and post the codes.

[prestigetravel]

Will try pedal test but previous owner tried and could get no lights to show codes. Both bulbs are ok in ell lights as the one flashes briefly as engine decides to start and once running the other without spanner on stays lit up.

Can't understand why neither eml  lights up when ignition key turned to live. Previous owner told by garage that edu fried as they couldn't get a read connection on diagnostics so purchased car expecting this may be what I have to do. Just seems odd of will idle ok!?

[rustym95]

volt dieode gone in ecu, happens when the engine is turn'd off and on on sort trips, vectras have same problem.

[dbug]

Try starting it with MAF disconnected.  If it starts and revs you need a new MAF sensor!

[Marks DTM Calib]

CLASSIC MAF sensor fault symptoms for this unit.

A proper T2 session would confirm.

Never seen or heard of this diode fault mentioned (nor can I imagine how it could happen given my lectronic knowledge)

[feeutfo]

somebody else had this a couple of weeks ago. Not sure the cause. Might be worth a search. Seem to remember crank sensor being involved somewhere along the line, but my memory is crap.

[prestigetravel]

Hi again, thanks all for your ideas. Have tried all day and can't get pedal test to do anything. Removed wiring to maf sensor and no different. Also disconnected crank sensor plug and two other plugs on top of as you look at engine right hand bank , I assume one to be camshaft sensor. And with these three and the maf diconnected engine still happily ticking over!!!?!? Now totally baffled.

[Andy H]

Just in case we have been diagnosing the wrong car....

You are referring to the 2000 MY (model year) 2.6 V6 that shows up against your profile?

[tunnie]

volt dieode gone in ecu, happens when the engine is turn'd off and on on sort trips, vectras have same problem.

Errr yeh....  :-? :-? Where did you get that one from?

[Andy H]

EUREKA (maybe)

Symptoms
1. won't rev up
2. pedal test doesn't work

I suggest you do some fault finding on the throttle pedal.

[Elite Pete]

Surely a 2000 year will be a 2.5 not a 2.6 so it will be the paperclip test

[prestigetravel]

It's definately a 2.6 it's an x reg registered end of nov 2000, while i was looking to buy one came across several x reg 2.6 registered nov/dec 2000 even though official launch date was jan 01