Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: MutantCav on 01 April 2009, 13:44:00

Title: MAF Sensor??
Post by: MutantCav on 01 April 2009, 13:44:00

Ok I have got the "My Naff Code Reader" working...great bit of kit...reset the non present airbag fault code and thus the warning light as well as an old code relating to the sunroof! :y

So also had a look at the live data for the engine...11.3v battery with engine off 14.3 or summat with it running which seemed about right and suggests the fix I did to the alternator has fixed it :y

So the engine has a running issue, when accelerating harder it not somuch misfires as just loses its kick here and there, no real pattern to it really...your pulling nicely then its accelerating but no real kick then the kick kicks back...think its the MAF

Would this be pretty much confirmed by the voltage reading for the MAF reading just 1.1v on the "My Naff Code Reader"??

Title: Re: MAF Sensor??
Post by: Proz on 01 April 2009, 13:51:15

Sounds exactly the same as mine did ... no misfire but hesitant and gutless ... i still have the reading i took with my "My Naff Code Reader" before i replaced the maf if it helps ....


Coolant Temp 85c - 97c throughout test.

@ idle

Mass Air   0.51 - 0.73 V    10 kg/h
Intake Air Temp  28c
EGR Position Feedback  0.80 V
O2 sensor Bank 1   745 - 862 mV Lean
O2 sensor Bank 2   647 - 804 mV Rich
O2 Loop Open
Short Term Fuel Trim   0%
Battery  13.1 V


@ 2500 rpm

Mass Air   1.61 - 1.69 V    31 kg/h
Intake Air Temp  32c
EGR Position Feedback  1.04 - 1.06 V
O2 sensor Bank 1   39 - 59 mV Lean
O2 sensor Bank 2   98 mV Lean
O2 Loop Open
Short Term Fuel Trim   0%
Battery  13.2 V

Title: Re: MAF Sensor??
Post by: MutantCav on 01 April 2009, 18:52:39

Have you got a similar reading after the MAF was sorted? :y Totally new to the "My Naff Code Reader" so nice to know what 'normal' is :)

Title: Re: MAF Sensor??
Post by: Proz on 01 April 2009, 21:06:00

Quote

Have you got a similar reading after the MAF was sorted? :y Totally new to the "My Naff Code Reader" so nice to know what 'normal' is :)

I dont at the minute as im at work now but i will try and hook it up tomorrow and take some readings for you .  Be interesting to see if there is a big difference  :y

Title: Re: MAF Sensor??
Post by: MutantCav on 01 April 2009, 21:25:20

Although I have a 3.0 v6 so not sure whether it would be different to the 2.2 or not anyway??

Title: Re: MAF Sensor??
Post by: Proz on 02 April 2009, 08:00:18

Of course i would expect yours to draw more air  :-/

Title: Re: MAF Sensor??
Post by: MutantCav on 02 April 2009, 10:21:18

Ok this morning at idle after a run I got following results...did the 2.5k one too but its in a CSV and cant open it yet as havent reinstalled Office yet...

@ idle

Mass Air   0.69 V    11 kg/h
Intake Air Temp  19c
EGR Position Feedback  0.66 V
O2 sensor Bank 1   156 - 800 mV Rich/Lean All over the place really
O2 sensor Bank 2   146 - 800 mV Rich/Lean All over the place really
O2 Loop Closed
Short Term Fuel Trim   0%
Battery  13.8 V

Engine Speed 571-612 rpm
Desired Engine Idle 600rpm

Desired Idle Air 10 Kg/h
Actual Idle Air 10 Kg/h  :y

Title: Re: MAF Sensor??
Post by: MutantCav on 12 April 2009, 09:12:39

Had a check no misfiring at all when in neutral...only when accelerating in gear...still thinking MAF will be able to sort out a replacement soon I reckon so we will see  :y

Title: Re: MAF Sensor??
Post by: MutantCav on 18 April 2009, 17:28:04

Ok MAF changed and "My Naff Code Reader" software and firmware upgraded...

MAF repoting 74 High Voltage not present...whats the normal cause of this??

Have reset code not sure if from old MAF and new software now seeing it or replacement MAF faulty or just plug/wiring issues and MAF is ok??

Car now accelerates really well when cold or in neutral but misses a little when up to temp...