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fast help! rusty red/brown plugs

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Old 01-31-2004, 06:50 PM
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Default fast help! rusty red/brown plugs

whats this mean? the car has been running so bad! 98 LS1 t/a its throwin misfire codes too and runs horible under 3500 rpm
Old 02-01-2004, 01:55 AM
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blown head gasket? leaving dexcool residue? thats all i can think of off the top of my head
Old 02-01-2004, 07:29 AM
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Maybe your running lean
Old 02-01-2004, 09:09 AM
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head gasket should be fine. its actually burning oil. i am thinking the car is running lean, causing detonation which made the rings go to **** which is why its burning oil really bad. its on my friends 98 t/a i did check the coolant though and the level is still full as can be after like a month
Old 02-01-2004, 10:00 AM
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Run a search, someone posted a guide to spark plug coloration not too long ago, might have been a header thread.
Old 02-01-2004, 10:18 AM
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yeah i think i read that, something about a bad fuel mixture or something that could cause it....i wasnt really sure tahts why i asked again
Old 02-01-2004, 10:46 AM
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Have you been juicing up your fuel with an additive? Sometimes a reddish/brown deposit can be caused by ATM fouling.
Old 02-01-2004, 10:53 AM
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Yea that is usually from fuel & oil additives, octane boost can do this also & cause problems.
Have you put something in?
I'd replace the plugs & keep a eye on it.
Old 02-01-2004, 11:01 AM
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nothing has been added to the gas tank besides 93 octane
Old 02-01-2004, 11:14 AM
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lean is white/ashy/gray. Is it CRUD? like does it flake off, if so, that sounds like water or contaminant.

Go put some new ones on and then check in a few more days. you dont use that gas crap they sell what is it methanol/ethanol mix right?
Old 02-01-2004, 12:11 PM
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its my friends car and what he told me was that he only uses regular 93 octane from the pump, thats it. when we replaced the stock plugs they were fine, we put in some new ones and then they looked like this. we did put some more in to see how they will look in about 2 weeks.




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