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Author Topic: Code 73 & 74  (Read 2251 times)

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bighed

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Code 73 & 74
« on: 16 November 2008, 14:31:26 »
well fully fixed misfiring problems with new parts off markey mark (Top fella indeed  :y) Just done paperclip test out of curiosity and its come up with codes 73 & 74. Mass air flow meter voltage low AND high  :o How does this work?? Surely it cant be both??  :-/
Oh and whilst putting scuttle back on we noticed the material padding underneath was full to the brim of water. Maybe that was dripping onto coil pack as it had been in there a long time cos when we squeezed some out it was brown  :-?
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TheBoy

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Re: Code 73 & 74
« Reply #1 on: 16 November 2008, 17:15:57 »
petrol mafs rarely fail unless you've fitted a chav filter, where the oil contaminates it.

Usual cause is an airleak somewhere - air intake, vac leak, egr etc...

Often get a false maf fault when you get a 19...
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bighed

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Re: Code 73 & 74
« Reply #2 on: 16 November 2008, 17:32:04 »
just been for a decent drive and tested again with engine turned off, Codes 73,74 and 19. But no 31. Should I not get a 31 with engine off???  :-/

Oh and no chav filter.   ;D :y
« Last Edit: 16 November 2008, 17:32:36 by bighed »
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TheBoy

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Re: Code 73 & 74
« Reply #3 on: 16 November 2008, 17:47:44 »
Quote
just been for a decent drive and tested again with engine turned off, Codes 73,74 and 19. But no 31. Should I not get a 31 with engine off???  :-/

Oh and no chav filter.   ;D :y
as said earlier, the crank sensor can through an erroneous maf fault.  Replace crank sensor (its buggered).


If you have a 19, you won't get the 31
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bighed

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Re: Code 73 & 74
« Reply #4 on: 16 November 2008, 17:51:09 »
where abouts is this and what effects can it have on the car TB?? :y
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TheBoy

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Re: Code 73 & 74
« Reply #5 on: 16 November 2008, 17:52:44 »
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where abouts is this and what effects can it have on the car TB?? :y
Sure there is a guide in maintenence guide.

Ultimate symptom is having your car delivered to garage on AA truck
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bighed

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Re: Code 73 & 74
« Reply #6 on: 16 November 2008, 17:56:50 »
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Quote
where abouts is this and what effects can it have on the car TB?? :y
Ultimate symptom is having your car delivered to garage on AA truck

is it that bad?  :'(
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Welung666

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Re: Code 73 & 74
« Reply #7 on: 16 November 2008, 18:01:24 »
Yep! If the crank sensor gives out the car will to, best to get it fixed before it comes to that.
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TheBoy

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Re: Code 73 & 74
« Reply #8 on: 16 November 2008, 18:04:20 »
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Quote
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where abouts is this and what effects can it have on the car TB?? :y
Ultimate symptom is having your car delivered to garage on AA truck

is it that bad?  :'(
Depends where you are. If you're outside your house, not too bad.  If you're 5 miles outside Dijon, well, thats 'inconvenient'  :-[
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Welung666

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Re: Code 73 & 74
« Reply #9 on: 16 November 2008, 18:07:28 »
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Depends where you are. If you're outside your house, not too bad.  If you're 5 miles outside Dijon, well, thats 'inconvenient'  :-[

 ;D ;D ;D
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bighed

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Re: Code 73 & 74
« Reply #10 on: 16 November 2008, 18:17:43 »
so..... If the crank sensor does give in the car will just cut out and not fire up then. can cope with that as long as it doesnt implode or anything!!!  :y
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bighed

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Re: Code 73 & 74
« Reply #11 on: 16 November 2008, 18:31:28 »
As above.  :y also has anyone got a crank sensor for sale?  ::)  :-/
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TheBoy

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Re: Code 73 & 74
« Reply #12 on: 16 November 2008, 18:37:53 »
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As above.  :y also has anyone got a crank sensor for sale?  ::)  :-/
buy new
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bighed

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Re: Code 73 & 74
« Reply #13 on: 16 November 2008, 18:40:07 »
right ok thanks  :y
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bighed

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Re: Code 73 & 74
« Reply #14 on: 16 November 2008, 18:45:00 »
is there only 1 sort of crank sensor or do they all differ?? as long as its for a 2.5 V6?? :-/

just found one on fleabay. Vauxhall part number 90492006. :-/has any one got a pic of where crank sensor plugs into on top part of engine please??

the one on fleabay also has a heat shield round it so that would help with it touching hot pipes etc wouldnt it
« Last Edit: 16 November 2008, 18:54:17 by bighed »
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