2001 Mazda 626 Cold Start Sputter

2001 MAZDA 626
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MARIE
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  • 1 POST
My check engine light came on I had my codes read and it was a misfire in cylinder #2. Ran sea foam through engine & I changed my spark plugs and found a cracked spark plug in that cylinder. Changed spark plug wires, changed oil w' lucas oil stabilizer. After doing all this my car ran awesome! For about 300 miles. Now it is sputtering right after I start the engine then stops sputtering once I start driving. I always use premium gas as recommended, and fuel injector cleaner every other tank. I always let it warm up for at least 10 minutes before driving because I live in a cold climate. My check engine light came on today when I started it... I went to check my codes again and none came up. Please Help!
Nov 28, 2006 at 1:43 AM
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MWHITNEY
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  • 63 POSTS
you said you had a cracked #2 plug where was it cracked at? I ask cause before i opened my shop I worked foor ford and mazda and i seen alot of intake butterflies fall apart and they would cause the car to run rough and bend or crack plugs? let me know
Dec 21, 2006 at 5:28 AM
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COSMO
  • ✓Experienced Mechanic
  • 347 POSTS
The intake butter flies are not in the 2.0L motor in the 626. One thing I would try right away is spraying either brake cleaner or carb cleaner around the intake manild/cyl mating surface. They are famous for having leaky intake gaskets. Also have another look at your plugs....if there are cracked ones again, you might be looking at a coil, but check the intake first


Cosmo...Mazda Tech
Dec 21, 2006 at 8:53 AM

Suggested Repair

Spray brake or carb cleaner around the intake manifold-to-cylinder mating surface to check for a leaking intake gasket, which is common on this engine. Recheck the spark plugs; if cylinder 2 is cracked again, suspect the ignition coil only after ruling out the intake leak.

Conversation Summary

A 2001 Mazda 626 with 82,000 miles had a cylinder 2 misfire and a cracked spark plug. After plugs, wires, Sea Foam, and an oil change with stabilizer, it ran well for about 300 miles, then began sputtering right after startup until driven. The check engine light returned with no codes stored. An expert said intake butterflies are not used on the 2.0L 626 and recommended checking for a leaky intake gasket first, then rechecking the plugs and considering a coil if they crack again.

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