2004 Toyota Sequoia stutter while driving

Tiny
04TOYOTAJACK
  • MEMBER
  • 2004 TOYOTA SEQUOIA
  • 134,000 MILES
I have a 2004 Sequoia that started sputtering while driving. It tripped the CEL and I took it to Autozone and had them read the code. Turns out one of the coils was bad. Replaced it and everything worked great for about three weeks.

However, engine is sputtering again while driving, but it isn't tripping the CEL. When I had them re-read the computer, it came up clean.

I did not replace the sparkplug when I replaced the coil pack. Could that be an issue, and wouldn't it trip the CEL?

Someone suggested running seafoam through to clean the injectors. Have done two tanks and still no improvement.

Any ideas?
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Wednesday, August 7th, 2013 AT 2:50 PM

5 Replies

Tiny
KHLOW2008
  • CERTIFIED MECHANIC
Have the spark plugs checked.
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Wednesday, August 7th, 2013 AT 3:03 PM
Tiny
04TOYOTAJACK
  • MEMBER
They were not. I have owned the car for three years and have not replaced them since I have had it.

Wouldn't a misfire cause the CEL light to come on though?
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Wednesday, August 7th, 2013 AT 3:13 PM
Tiny
KHLOW2008
  • CERTIFIED MECHANIC
Sometimes it does not.
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Wednesday, August 7th, 2013 AT 3:26 PM
Tiny
04TOYOTAJACK
  • MEMBER
Thanks for the info.

Replaced all of the plugs. Plug in cylinder #6 did indeed have a crack in the ceramic insulator.

Also noticed during removal that plug 5 was not seated very tightly and the coil pack was much dirtier looking than all of the others. Cleaned it, replaced the plugs, and low and behold, no mor engine stutter.

Thanks for the advice. Nothing like a $30.00 fix!
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Saturday, August 10th, 2013 AT 10:07 AM
Tiny
KHLOW2008
  • CERTIFIED MECHANIC
You're welcome.

Glad to know the problem has been fixed.

Have a great weekend.
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Saturday, August 10th, 2013 AT 11:57 AM

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