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[rocky daytona]

hi everyone still having problems with my 03 omega  the car has basically no power and very lumpy i had a diagnosis guy out today he said that he could only find that the air flow meter was not working to its full potential he disconnected it then re booted the ecu he then drove the car around and it drove basically correctly only once having a bit of a flat spot he told me to get a maf senser which i have done the car will now not go up any kind of slope it will rev up but is stiil lumpy any kind of load and it wont drive im at my wits end ive spent £200,00 and got nowhere any one got any ideas please

[Elite Pete]

Its not very often a MAF Sensor packs up unless there's an airfilter or induction kit that uses oil.

Try this test and post up the results, with yours being an 03 car it will be the pedal test

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

Oops, I have just presumed you've got a V6. Fill in your profile with your cars details

[Techno]

Hmm strange you mention load and that it's sort of ok without any is the car an auto?

If so it could be auto box?

Lumpy idle points to several things check here:
http://www.omegaowners.com/forum/YaBB.pl?num=1227711369/0

Re-booted the ECU didn't know you could though it was plug and play?  :-/  So not a true re-boot.

I think it's something very simple normally is but I'm surprised the diagnosis guy couldn't find the issue but then thinking about it I'm not most are crap and not worth the expense.  

  

[Essex_Andy]

For fear of sounding like a parrot....

A lot of people are starting threads about poor running since the cold and damp weather has arrived. Including me.

I have a perfectly running car again after fitting new HT leads this morning.

I know its a bugger of a job but worth doing before spending money on MAF and dispack etc

[rocky daytona]

thanks for views car is auto has coil packs on both heads no leads gearbox is fine the guy drove the car this afternoon i heard it go up yhe road sounded ok went through the gears but now its back to no power and all over the place no so much misfires more like too much fuel or not enough its still coming up multiple misfires and oxygen senser

[Jay w]

are you getting the engine management light coming one at all, i would have expected the MAF to throw up a code or two....

to check:

switch ignition off
put feet on both accelarator and brake at the same time.
put ignition on (do not start)
look for spanner symbol light flashing
count flashes jot down the number and let us know

[rocky daytona]

engine light comes on sometimes only thing on it is oxygen senser and lots of misfires sometimes the car runs better  then goes back to not reving up and misfires or what seems like misfires im wondering if its a fuel problem like fuel relay or pump has anyone had these problems thanks

[feeutfo]

your car has a free diagnostic built in so as said follow pedal trick guide for 3.2 listed here
http://www.omegaowners.com/forum/YaBB.pl?num=1189022687
Count the flashes and post the codes up. Or look here http://www.obd-codes.com/trouble_codes/
What diagnostic tool did your man use by the way?

[feeutfo]

engine light comes on sometimes only thing on it is oxygen senser and lots of misfires sometimes the car runs better  then goes back to not reving up and misfires or what seems like misfires im wondering if its a fuel problem like fuel relay or pump has anyone had these problems thanks

Ah ok, what was the exact code? If you have a new maf it may need to learn the new values. Sounds like Kevin Wood territory maybe.

[Jay w]

if sounds like the car is dropping into limp mode, this would give you the lack pf power.....

you NEED to find the code it is giving and cure that first, putting new potentially unrelated parts on a car that has issues will only cause more frustration.

There are posts about the O2 sensors on these cars, this might be a god place to start...

http://www.omegaowners.com/forum/YaBB.pl?num=1223977027

[ngrainqey]

you could check the plug wells for oil in them (alot of people say to check the front drivers side plug but on mine the drivers side were all bone dry and passengers were more like an oil well! )