ses light is on and reads P0300

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Aug 15, 2007 | 10:31 PM

lt1z28

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ses light is on and reads P0300

the ses light came on and it told me that multiple random cylinder missfire what would be causing that??

Aug 15, 2007 | 10:53 PM

Redneck97

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Joined: Nov 2006

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RE: ses light is on and reads P0300

could be the opti spark.

Aug 15, 2007 | 10:55 PM

lt1z28

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RE: ses light is on and reads P0300

yeah thats what i thought but idk if i want to go spend the couple hundred and then not fix the problem i was thinking it could be a vacum leak

Aug 16, 2007 | 10:33 AM

94Z28interceptor

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Joined: Sep 2006

Posts: 125

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RE: ses light is on and reads P0300

do you have a noticeable miss?

Aug 16, 2007 | 02:50 PM

lt1z28

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RE: ses light is on and reads P0300

yeah i can only feel it when its ideleing at like at stop light but once i get it up to about twenty miles an hour it stops im thinking that my egr valve is stuck slightly open

Aug 16, 2007 | 06:24 PM

94Z28interceptor

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Joined: Sep 2006

Posts: 125

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RE: ses light is on and reads P0300

sounds like classic opti symptoms.. how many miles on the car?

Aug 16, 2007 | 07:04 PM

lt1z28

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RE: ses light is on and reads P0300

it has 104xxx on it

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