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Code and Stumbling


Sour Grapes

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May 24, 2011
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Location
Ontario, Canada
Vehicle Year
2004
Make / Model
Mazda
Engine Size
Three.Zero
Transmission
Manual
I picked up a 2004 Mazda B3000 2WD on Sunday with my girlfriend. Very nice truck; ran great and super sharp looking. I drove it 1.5 hours home with no issues at all. Today, however, I drove it 40 min away to my buddy's house so he could help put my hitch and tonneau cover on, and the check engine light came on. In between 1,200 and 2,250 RPM, it also seemed to stumble/buck/jerk.

I noticed that it was during light to moderate acceleration that this happened. I could floor it and it wouldnt be an issue. Once I got to my buddy's place, he threw his scanner on it, and it came up with one code; P0430. Apparently this is poor performance of the catalytic converter in the left (driver) bank behind the cat. I googled and it said to replace the o2 sensor. Replaced the sensor and cleared the codes. So far, the light hasn't come back on but it still bucks/jerks/stumbles. I also feel that it is not quite performing. The air filter looks clean, the plugs are like new, the fuel filter has been changed. I see absolutely no restrictions in the intake area etc. Any suggestions? My buddy and I are thinking CATs.

Sorry about the novel guys; I try and be as descriptive as possible. Cheers!
 


Sour Grapes

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Mazda
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Manual
well, it turns out that the P0430 code did not return-this time. I had a cracked coil, and the spark plug wires were switched between 5-6?? I havent even touched the truck under the hood, aside from checking the oil and adding washer fluid.
i took the truck to quebec, and on my return trip, the CEL returned. I drove the 820km home under a watchful eye, and no issues driving-wise. I brought it to Ford today, and P0430 code pulled up again. Tests so far say my cats are good. Any ideas?
 

Sour Grapes

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Ontario, Canada
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2004
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Mazda
Engine Size
Three.Zero
Transmission
Manual
so i finally got an answer..the cat IS screwed on my truck. Since i Just bought it, I dont have to pay for it (PHEW). Ford's part is $1483 :shok:
 

JP02XLT

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Ranger
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Before you throw a new cat at it, realize that there is or has been an underlying issue that cooked the original cat, I would investigate this a bit further for the real cause.

JP02XLT
 

Sour Grapes

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May 24, 2011
Messages
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Location
Ontario, Canada
Vehicle Year
2004
Make / Model
Mazda
Engine Size
Three.Zero
Transmission
Manual
ya i found the coil was cracked and the dealer switched the spark plug wires for cylinders 5 and 6 :annoyed:

its going back into the shop this week to get fixed.
 

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