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Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

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  #1  
Old 10-07-2011, 01:09 PM
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Join Date: Jul 2007
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Default #7 misfire

Tahoe started running rough this weekend. Last night the CE light came on and coded for #7misfire. I swapped out the coil pack with #1 and reset the light. This afternoon the CE light came back on, again misfire #7. Is this a spark plug and wire issue or is there something else I can check?

All wires and plugs were changed less than 25k miles.
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Old 10-07-2011, 01:23 PM
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2007 Chevrolet Tahoe
 
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I would walk all three items to the opposite side of the engine.... but yes it could be a plug and or wire....might try running some injector cleaner thru also..
did you replace them with OEM or aftermarket plugs wires?
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Old 10-07-2011, 02:08 PM
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Quote:
Originally Posted by in2pro View Post
I would walk all three items to the opposite side of the engine.... but yes it could be a plug and or wire....might try running some injector cleaner thru also..
did you replace them with OEM or aftermarket plugs wires?
yes, thanks
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  #4  
Old 10-08-2011, 02:20 PM
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replaced #7 spark plug and let it idle for about 5 mins. so far no misfire. This is what the old spark plug looked like after 23k miles. Is this caused by excessive oil consumption?
Attached Thumbnails
#7 misfire-photo-jpg   #7 misfire-photo-1-jpg  
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  #5  
Old 10-08-2011, 02:39 PM
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not anymore Kevin Koloff
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Looks like detonation
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Old 10-08-2011, 02:39 PM
 
 
 
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02, 2007, 2008, 7, 7misfire, chevy, consumption, cylinder, hybrid, misfire, misfiring, missfire, number, oil, plug, suburban, tahoe


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