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OT: 2010 Mazda 3


 
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Woodchuck
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Location: Upstate NY

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PostPosted: Mon Oct 22, 2012 7:30 am    Post subject: OT: 2010 Mazda 3 Reply to specific post Reply with quote

My wifes 2010 Mazda 3 seems to have a "soft skip" when ideling and hot, seems to puff slightly through the exhaust. When it's cold there is no problem. It has thrown a P0303 code several times. If I pull either the wire harnes to a coil or injector it misses completely on that cylinder. I have changed the plugs and swapped the coils to different cylinders. (1 to 4, 4 to 3, 3 to 2, 2 to 1) with no change. When it throws a code it's still cylinder 3. I have run 3 cans of Seafoam in the tank and it hasn't thrown a code since, but still has a "soft skip" at hot Idle.
Could this be a bad injector or something mechanical like a mis-adjusted valve?
 
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thommoos
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PostPosted: Mon Oct 22, 2012 1:13 pm    Post subject: Re: OT: 2010 Mazda 3 Reply to specific post Reply with quote

Some of those Mazdas have solid lift valves. Therefor if it is out of adjustment it might pick up a skip otherwise pop the hood at night and check for arching plug wires, you might have to pullout and look at the based be sure to use insulated plug wires, they will light you up.
 
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thommoos
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PostPosted: Mon Oct 22, 2012 1:15 pm    Post subject: Re: OT: 2010 Mazda 3 Reply to specific post Reply with quote

solid valve motor, needs valve adjsutment
 
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1951 8N
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PostPosted: Mon Oct 22, 2012 1:30 pm    Post subject: Re: OT: 2010 Mazda 3 Reply to specific post Reply with quote

Thommoos wrote:
Some of those Mazdas have solid lift valves. Therefor if it is out of adjustment it might pick up a skip otherwise pop the hood at night and check for arching plug wires, you might have to pullout and look at the based be sure to use insulated plug wires, they will light you up.


Plug wires on a 2010 vehicle? This car doesn't have plugs wires. It has a coil on plug ignition system.
 


Last edited by 1951 8N on Mon Oct 22, 2012 1:31 pm; edited 1 time in total
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Woodchuck
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PostPosted: Tue Nov 20, 2012 9:58 am    Post subject: Re: OT: 2010 Mazda 3 Reply to specific post Reply with quote

Took the Mazda to the dealer. They said it would most likely need the engine replaced. If not covered by the warranty it would be $6,000 to $7,000. I told them if it wasn't on warranty I'd be taking it home for a junk yard engine swap.
They called this morning. It's covered and we get a loaner.
I wasn't looking forward to swapping an engine right now.
 
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