Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Alex W on 10 July 2008, 15:52:18

Title: Won't start - Air Flow Meter?
Post by: Alex W on 10 July 2008, 15:52:18
My 2.5 v6 wouldn't start today. It turned over strongly but wouldn't fire at all. I've had it towed to a local independant who have got it going and say they reckon its a faulty Air Flow Meter and that'll be £300 please.

Before I authorize the work any of you experienced guys got any comments?

Does it sound right?

I've spent over £2500 on various repairs and servicing over the last three years and I'm getting to the end of my tether.
Title: Re: Won't start - Air Flow Meter?
Post by: Marks DTM Calib on 10 July 2008, 15:55:27
No it doesn't sound right at all!

1) I am yet to see a MAF fail
2) MAF fault codes are commnly thrown when the crank sensor plays up (code 19)
3) With a fully failed MAF it would not stop the car from starting.
Title: Re: Won't start - Air Flow Meter?
Post by: rickyboy on 10 July 2008, 15:58:22
Sound unlikely.  Far more likely to be the crank sensor at fault which is a far cheaper fix.  Seems that it's not uncommon for garages to claim MAF sensors are faulty and charge you a bomb.  You need some confirmation of fault codes.
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 10 July 2008, 16:15:33
Thanks guys, I'll go get it back.

I'll see if they can give me the error codes.
Title: Re: Won't start - Air Flow Meter?
Post by: Marks DTM Calib on 10 July 2008, 16:23:19
Quote
Thanks guys, I'll go get it back.

I'll see if they can give me the error codes.


Short out pins 4 and 6 in the diag connector with a paper clip and read them yourself.
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 10 July 2008, 16:38:13
Thanks Marks,

I just watched the video and printed out the photo for the "Paper Clip Test".

I really appreciate the help.

Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 10 July 2008, 17:24:01
Spoke to the garage again because I can't get a lift to pick the car up tonight.

They say that when it was recovered to them they simply turned the key and after a few seconds it started up. They have logged error code 74 "Mass Air Flow Voltage High".

They are only charging me for recovery if I want to take it away.
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 10 July 2008, 21:45:09
As said on another thread, are you in the west of Northants, ie around Brackley area ;)
Title: Re: Won't start - Air Flow Meter?
Post by: Cav9_4 on 10 July 2008, 23:10:18
Quote
Spoke to the garage again because I can't get a lift to pick the car up tonight.

They say that when it was recovered to them they simply turned the key and after a few seconds it started up. They have logged error code 74 "Mass Air Flow Voltage High".

They are only charging me for recovery if I want to take it away.

Had same code on mine a few years ago,fortunately my dad also has same car so i swapped them both over,mine started,his didn't,sourced a second hand one (£10)...HTH..Wayne
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 11 July 2008, 08:41:47
I am near Towcester
Title: Re: Won't start - Air Flow Meter?
Post by: Marks DTM Calib on 11 July 2008, 08:44:33
Quote
I am near Towcester


Kin hell, TB is only down the road in Brackley with a real Tech 2!
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 11 July 2008, 09:20:36
Quote
Quote
I am near Towcester


Kin hell, TB is only down the road in Brackley with a real Tech 2!
Technically, its uphill from Towcester ;D

Alex W - yes, I'm in Brackley should you want some a better diagnosis on it...
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 11 July 2008, 09:48:26
Spoke to the garage, the car started on first turn of the key this morning so I will be collecting it this afternoon.
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 11 July 2008, 12:52:30
Quote
Spoke to the garage, the car started on first turn of the key this morning so I will be collecting it this afternoon.
Get it home, then do paperclip test on it. Then post back here :y
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 11 July 2008, 16:56:01
Result of Paper Clip test:
74
73
31
Title: Re: Won't start - Air Flow Meter?
Post by: rickyboy on 11 July 2008, 17:02:30
Sounds like it is the MAF sensor after all.  Buy a second hand one though, new costs a fortune and they rarely fail so used one is fine.  There are plenty of folk on here that will be able to sell you one for peanuts.
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 11 July 2008, 21:56:34
What size engine is it?
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 12 July 2008, 10:04:38
2.5 V6
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 12 July 2008, 10:56:48
are you able to check for airleaks on the intake?
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 12 July 2008, 11:03:42
Sorry, wouldn't know where to start.
Title: Re: Won't start - Air Flow Meter?
Post by: Alex W on 12 July 2008, 11:05:04
I believe there is an air leak somewhere though. When I accelerate quickly to 4750rpm I hear a whistling down similar to that made by a slipping belt
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 12 July 2008, 13:02:15
Quote
I believe there is an air leak somewhere though. When I accelerate quickly to 4750rpm I hear a whistling down similar to that made by a slipping belt
Thats most likely the issue!

I'm busy today, but if the weather is nice tomorrow (too much junk in the garage), you can pop it over.  Or if Tunnie is around, use his garage ;D
Title: Re: Won't start - Air Flow Meter?
Post by: TheBoy on 13 July 2008, 09:51:35
Weather looks decent today, so pop it over.  I'll PM you address.