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Old 04-02-2012, 08:15 PM   #1 (permalink)
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Default P0172 Bank/ Cylinder #1 Spark Plug is Wet

I checked the spark plug and it is wet with fuel the other spark plugs are dry and seem fine. What do I need to change? I have search the forums and I have not come to a solution. The CEL blinks sometimes so I am worried and pressed for a solution.
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Old 04-02-2012, 08:47 PM   #2 (permalink)
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Possible leaky injector, how is the idle? Check to see if there is spark at the wet plug.
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Old 04-02-2012, 10:46 PM   #3 (permalink)
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Possible leaky injector, how is the idle? Check to see if there is spark at the wet plug.

The car/engine shakes and smoke comes out...how to check for spark at the wet plug?
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Old 04-03-2012, 08:44 AM   #4 (permalink)
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Pull the boot off the spark plug and wiggle the boot back to expose the metal (or just get it close to the end). Hold the end near the block with the engine cranking/running and look for spark. Spark should be able to jump a 1/4" gap or more.
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Old 04-03-2012, 12:12 PM   #5 (permalink)
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Do you also have a po301 code? If so, check/replace plug(s), wire(s) and ignition coil pack in that order.
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Old 04-03-2012, 01:16 PM   #6 (permalink)
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Do you also have a po301 code? If so, check/replace plug(s), wire(s) and ignition coil pack in that order.

I THINK I had that code initially and the plugs and wires have been changed...would a bad coil pack cause a rich code in bank 1? I have changed the 02 upstream sensor a year back when I got a code about bank 1.
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Old 04-03-2012, 01:22 PM   #7 (permalink)
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Pull the boot off the spark plug and wiggle the boot back to expose the metal (or just get it close to the end). Hold the end near the block with the engine cranking/running and look for spark. Spark should be able to jump a 1/4" gap or more.
Don't think I'll be able to expose the metal without tearing my boot cover...
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Old 04-03-2012, 08:52 PM   #8 (permalink)
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Don't think I'll be able to expose the metal without tearing my boot cover...
Then your options are to stick something metal in there or check the spark at the coil by grounding a screwdriver or test light and bringing it near the coil port with the plug wire unplugged.
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Old 04-03-2012, 09:32 PM   #9 (permalink)
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Sache, if you have a flashing CEL, you have a misfire. If #1 cyl. is dead (no spark) and the injector is washing it down with fuel, you have a rich condition which is very hard on bank#1 cat. converter and mpg.

Last edited by sheila; 04-04-2012 at 12:43 PM.
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Old 04-03-2012, 11:13 PM   #10 (permalink)
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Video on checking spark:

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