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[zirk]

Ok, just got back home with the car after a mission trying to get it to fire up.... Had a chat with my mechanic friend who confirmed that he had used a spare MAF with the same part No that he had in his box of odds'n'sods but the car ran the same with this fitted so he refitted the old one.

Had to jump the car as the batt was low, managed to get the car to start but it would not rev at all and idled really badly (make a machine gun noise with your tongue, it sounded like that!) After a few minutes it seem to settle and idle but wouldn't rev at all, so i unplugged the MAF and suddenly it revs like it should - freely!

So jumped in after letting it idle for 10 or so minutes (thankfully I only live four streets away from him) and pulled away, but no such luck! Car was misfiring again, couldn't pull its own weight and kept wanting to die so i was forever dipping the clutch, coasting so the engine would idle then building the revs up and bringing the clutch in to get some momentum.

Managed to get back to mine but it seems the issue still persists! I think i'll get another MAF from ECP for piece of mind and cross that off the list, i'll also disconnect the battery tonight to clear those fuel thingies and also get any codes, should there be any!

My only issue is while i'm doing all these things with the advice from you guys i am really in way over my head, I know the main dealer wouldn't have a clue and my local garage has done all they can with the experience they have.... Should i be looking at a specialist who would deal with mapping & ECU issues?

Another Known Good Maf would help to rule out Maf issues, or could be if your maf is oil'ed up its still working but giving inaccurate signals, may be the ECU has tried to learn from it, and didn't wont to play ball with your mates Maf, or that could be faulty also.

Did you check the Fuel flow feed? when did you last check spark plug condition.

As said leave the Batt off over night or diss the 2 ECU Plugs.

Wouldn't go down the specialist ECU route just yet, could be putting a red herring into the equation and wont be cheap!, although I have suggested possible ECU issue, easiest way would be to do a ECU swap out (10 min job with Key Chips and Immobiler ECU), shame you not a bit closer Paul. 

[P6UL K]

Should i be looking at a specialist who would deal with mapping & ECU issues?

Maybe - the difficulty is finding someone who knows the Omega as well as the key people on OOF.

I think you have more than one issue which means that the fault finding requires an even more methodical approach than normal.

The symptoms described in your last post sound like a classic fuel starvation issue so fuel pump, fuel filter, pressure regulator and pipework all need to be checked and proven before being discounted.

I appreciate the Omega is a bit of a nichι but i'd like to assume that the problems i'm having would be shared, to a certain extent but other model Vauxhalls...? No?

The frustrating part in all this is the time factor, living on my own, working 5 days a week and i have my daughter the other 2 days of the week - getting outside to work on the car is practically impossible so taking the easy option of getting a garage to do the work is very appealing, but no doubt costly.

I'll try to check those items highlighted in the morning, the car had a new fuel pump 2/3 years ago and when the pump went before, it just went and left me stranded! 

I have a Bluetooth OBD connector arriving anyday soon which will be a great help!

[P6UL K]

Another Known Good Maf would help to rule out Maf issues, or could be if your maf is oil'ed up its still working but giving inaccurate signals, may be the ECU has tried to learn from it, and didn't wont to play ball with your mates Maf, or that could be faulty also.

Did you check the Fuel flow feed? when did you last check spark plug condition.

As said leave the Batt off over night or diss the 2 ECU Plugs.

Wouldn't go down the specialist ECU route just yet, could be putting a red herring into the equation and wont be cheap!, although I have suggested possible ECU issue, easiest way would be to do a ECU swap out (10 min job with Key Chips and Immobiliser ECU), shame you not a bit closer Paul. 

I'll price up a new MAF tomorrow but i cant afford to be replacing stuff willy-nilly, I'll end up going down the same route as the bloody DTi 

Battery is now disconnected, I'll go pull the ECU plugs too just to be sure!

Spark plugs are new but i suppose checking them will show which cylinders are not playing ball!

[jonny2112]

Don't know if it would help, but I have a spare known good MAF if you need to borrow one 

[zirk]

Another Known Good Maf would help to rule out Maf issues, or could be if your maf is oil'ed up its still working but giving inaccurate signals, may be the ECU has tried to learn from it, and didn't wont to play ball with your mates Maf, or that could be faulty also.

Did you check the Fuel flow feed? when did you last check spark plug condition.

As said leave the Batt off over night or diss the 2 ECU Plugs.

Wouldn't go down the specialist ECU route just yet, could be putting a red herring into the equation and wont be cheap!, although I have suggested possible ECU issue, easiest way would be to do a ECU swap out (10 min job with Key Chips and Immobiliser ECU), shame you not a bit closer Paul. 

I'll price up a new MAF tomorrow but i cant afford to be replacing stuff willy-nilly, I'll end up going down the same route as the bloody DTi 

Battery is now disconnected, I'll go pull the ECU plugs too just to be sure!

Spark plugs are new but i suppose checking them will show which cylinders are not playing ball!

That was the whole idea of a meet up Paul, so you didn't have to go down that route.

As expressed earlier I have a fully working, faultless 3.2 Manual Ex Thames Valley Estate sitting here. Not suggesting for one minute that you can help yourself to parts willy nilly, but we can go through a typical diagnostic routine, read and clear codes with the potential to swap parts one by one (and back again) to eliminate possible sensors or causes, with the view that the part or parts you need to replace is going to sort the issue.

[P6UL K]

Appreciated Chris, but with a car that won't move under it's own power without wanting to conk out it's an option I can't even consider mate.

[zirk]

Appreciated Chris, but with a car that won't move under it's own power without wanting to conk out it's an option I can't even consider mate.

Ok Paul, I'll give you a shout tomorrow with some other possibilities, but wont be able  to do anything this week or next weekend due to personal and other issues, if that helps, but not too sure what your time scales are?

Have your Mobile number from way back, if its changed Txt or pm the new No. as need some shut eye now. 

[Webby the Bear]

Hi guys, hope you're well.

Don't want to come here and be like ''could be this, could be that'' etc.

However one thing that hasn't been mentioned which, for a misfire of such magnitude, can I ask has a compression test and/or cylinder leakage test been done?

in this situ it would give me some piece of mind to know that I'm definitely chasing a fuel, air or spark issue as opposed to an issue with the block or heads.

[Kevin Wood]

Can we get some live data or trouble codes from the engine ECU?

If it's really struggling to run you have a problem that's common to all cylinders, IMHO. Ignition / coil pack / compression issues would affect a single cylinder and cause it to run but with a misfire.

Complete lack of go suggests to me that it's MAF / Crank sensor or a basic fuel supply problem (pump, filter or pressure regulator).

[05omegav6]

Wonder if the purge valve has failed is there a hiss when the filler cap is opened? If there is, try starting it with the cap off...

Tech2 should be able to show purge valve function, if it has stuck open you might get a vacuum back to the tank

[P6UL K]

Can we get some live data or trouble codes from the engine ECU?

If it's really struggling to run you have a problem that's common to all cylinders, IMHO. Ignition / coil pack / compression issues would affect a single cylinder and cause it to run but with a misfire.

Complete lack of go suggests to me that it's MAF / Crank sensor or a basic fuel supply problem (pump, filter or pressure regulator).

How would i go about doing that Kevin?

[P6UL K]

Wonder if the purge valve has failed is there a hiss when the filler cap is opened? If there is, try starting it with the cap off...

Tech2 should be able to show purge valve function, if it has stuck open you might get a vacuum back to the tank

Usual rules apply, no-one in Kent with a Tech2 and the car won't move very far under its own steam to be able to get it to Kevin for instance

[Webby the Bear]

Can we get some live data or trouble codes from the engine ECU?

If it's really struggling to run you have a problem that's common to all cylinders, IMHO. Ignition / coil pack / compression issues would affect a single cylinder and cause it to run but with a misfire.
Complete lack of go suggests to me that it's MAF / Crank sensor or a basic fuel supply problem (pump, filter or pressure regulator).

Fair comment Kev,

Timing out perhaps? That obviously would also affect all

[05omegav6]

Wonder if the purge valve has failed is there a hiss when the filler cap is opened? If there is, try starting it with the cap off...

Tech2 should be able to show purge valve function, if it has stuck open you might get a vacuum back to the tank

Usual rules apply, no-one in Kent with a Tech2 and the car won't move very far under its own steam to be able to get it to Kevin for instance

You can unplug it to rule it out electrically... This will produce a code so might be best to leave it plugged in. It can also be physically disconnected it by removing the larger of the two centre pipes on the breather bridge. Simply pull the hose off and plug the nozzle on the breather bridge. Leave the hose unblocked and the valve plugged in.

If you try any free checks and report back, then items can be ruled out. At some point it will need plugging in to see what is actually going on, even if that means arranging a mutually convenient time to get it plugged in to a tech 2 by someone who knows how to use it...

[P6UL K]

And its......... FIXED!! 

Place your guesses here, you'll never get it!! 

It had nothing to do with ANY of the replies or ideas of what the issue could of been, also she's running spot on as well which says that all the mods I've done under the bonnet have no issue with the running of the engine