Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

Fouling Plugs!!

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Old Mar 15, 2017 | 03:50 PM
  #1  
papp-fox's Avatar
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Default Fouling Plugs!!

I have a 97 Accord b22b2 engine that has taken to fouling pugs. My son wrecked this car a couple of months ago, we rebuilt the front end and got it road worthy. He drove it for about two weeks and the distributor cap failed. We replaced the cap and the rotor button but would not start. Replaced all 4 plugs and it started and ran fine. 1 week later all 4 plugs are wet fouled. Dried the plugs and put them back in and the car started but stumbled until the cylinders cleared out. Now after it sits for a period of time when it starts it stumbles until you feather the throttle and clear it out again. I have a P0441 code which I know is emissions but that's it. What am I looking for?
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Old Mar 15, 2017 | 04:21 PM
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Default Re: Fouling Plugs!!

like blk with oil or wet with fuel or antifreeze
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Old Mar 15, 2017 | 04:39 PM
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From: sleeping in a 368k 95 gs-r
Default Re: Fouling Plugs!!

could be weak spark if it's unburnt fuel. most ignition parts need tossing after 5 years or so.

https://www.ngksparkplugs.com/techin...q/faqread2.asp
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Old Mar 15, 2017 | 04:57 PM
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Default Re: Fouling Plugs!!

Originally Posted by HondaTechMan121
like blk with oil or wet with fuel or antifreeze
The plugs seem to be wet with what smells like fuel, but feels kind of greasy like antifreeze. We replaced the head gasket not even 1000 miles ago and ran great until he wrecked it. The wreck may be coincidence tho!
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Old Mar 16, 2017 | 10:38 AM
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Default Re: Fouling Plugs!!

can you post a pic of the fouled plugs? and are all four fouled the same way/amount?
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Old Mar 16, 2017 | 10:54 AM
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Default Re: Fouling Plugs!!

fouled plugs normally come from an exhaust leak...the oxygen sensor thinks there's too much oxygen in the system so it dumps fuel in to try to enrichen it

you can try seafoaming it and look for white smoke billowing out of the exhaust anywhere from the exhaust manifold to the oxygen sensor
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Old Mar 16, 2017 | 04:55 PM
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Default Re: Fouling Plugs!!

I agree that the exhaust manifold may be cracked.
If the car's front end was damaged the exhaust manifold may be cracked, unless you remove the heat shield and manifold itself(factory MLS is reusable) there is no way to know for sure.
Also, the B2 has the O2S in the exhaust manifold, if it was impacted or damaged the sensor itself may be damaged. If the ceramic sensor inside has cracked or broken the sensor will read 'lean' and dump fuel.
Disconnect the wire to the O2S and see if the car runs better and does not foul the plugs the O2S is probably toast. Pull it out and look for any damage, if it rings like a jingle bell the sensor is done. And no, it will not always set a code. O2S are funky like that.

Replace with a new Denso unit, Rockauto.com usually has the best price. More Information for DENSO 2344620
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