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Omega Help Area => Omega General Help => Topic started by: dieseld4 on 07 March 2010, 16:02:48

Title: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 07 March 2010, 16:02:48
my mv6 has a miisface on cylinder 1, the plug well on that side was full of oil, so i changed the rocker cover gaskets and the ht leads, but it still has a misfire, EML is on and the only fault code i could get was something to do with the air con. what should i do next, change the coil pack?
Title: Re: misfire mv6
Post by: johnnycboy on 07 March 2010, 16:23:26
Quote
my mv6 has a miisface on cylinder 1, the plug well on that side was full of oil, so i changed the rocker cover gaskets and the ht leads, but it still has a misfire, EML is on and the only fault code i could get was something to do with the air con. what should i do next, change the coil pack?

Are you sure you read the code correctly. not teaching you to suck eggs, but may be worth looking again.
Title: Re: misfire mv6
Post by: dieseld4 on 07 March 2010, 16:32:12
Your ok I'm kind of learning as I go along, I done it last week before I changed the gaskets, I done it a few times and it was 87, but I think I'll go check a again

Thanks
Title: Re: misfire mv6
Post by: johnnycboy on 07 March 2010, 17:56:39
Quote
Your ok I'm kind of learning as I go along, I done it last week before I changed the gaskets, I done it a few times and it was 87, but I think I'll go check a again

Thanks

Thats how we all learn :y

What engine is it I'm assuming 3.0. 

When you get a chance report back your codes and hopefully get your problem sorted ;)

Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 07 March 2010, 17:56:49
Right just done paperclip test again, i'm getting code's:

87   A/C Cutoff Relay Voltage Low
49   Battery Voltage High
73   Mass Air Flow Sensor Voltage Low
31   No Engine RPM Signal

I havn't a clue, what should i do now?
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: johnnycboy on 07 March 2010, 17:58:49
Quote
Right just done paperclip test again, i'm getting code's:

87   A/C Cutoff Relay Voltage Low
49   Battery Voltage High
73   Mass Air Flow Sensor Voltage Low
31   No Engine RPM Signal

I havn't a clue, what should i do now?

everything been reconnected after your gasket changes.  if so try ditching the maf to see if it runs any better
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 09 March 2010, 22:17:48
Right I decided to change the coil pack and now there is no misfire and the car sounds pretty good, but still the eml is on, with fault codes:

87   A/C Cutoff Relay Voltage Low
49   Battery Voltage High
73   Mass Air Flow Sensor Voltage Low
74   Mass Air Flow Sensor Voltage High
19   Incorrect RPM Signal

Changed the maf and still the same, the car is an auto and will only drive in first gear, I'm guessing this is because the eml is on and the car is in limp mode, am I right? so what should I do now? I have a full car of spare's so I can change anything...
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: Entwood on 09 March 2010, 22:26:03
19 = crank sensor.... needs changing as it will thow up loads of other faults .. and when it gives up your car will just stop ...... dead.

easy to change .. just important to get the right one ....

http://www.omegaowners.com/forum/YaBB.pl?num=1174321688

fiddly bit is getting your hands on the plug, scuttle off helps here . :)
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 09 March 2010, 22:34:30
Oh Thank you, I'll and do that tomorrow and hope for the best :)
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 11 March 2010, 18:28:25
I've changed the crank sensor the eml is still on, the fault codes are still the same plus two more:

21   Throttle Position Sensor (TPS) Voltage High
22   Throttle Position Sensor (TPS) Voltage Low

What should I do now?? :( :-/
Title: Re: misfire mv6, code's 87, 49, 73, 31
Post by: dieseld4 on 19 March 2010, 19:25:18
I still havn't got this car sorted, I would be grateful if anyone could help me.. Thanks.