2002 Dodge Intrepid

Tiny
KERRIN777
  • MEMBER
  • 2002 DODGE INTREPID
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 12,300 MILES
Intrepid 2.7L - check engine light came on - took to autoparts store - diagnostics say misfire in cylinder one and o2 sensor 1 was bad. Replaced all spark plugs and cylinder 1 boot (passenger side) and both front o2 sensors.(Wasn't sure which was bank 1 so replaced both). Light still on now - diagnostics now say multiple misfires. Car interior lights flicker while driving and while idling - idles at low RPM but timing is not off (according to diagnostics). Has a rough idle when in drive as well.
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Wednesday, January 14th, 2009 AT 1:20 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
Hello
Thanks for the donation.

For DTC P0300 -- Multiple Cylinder Misfire , perform the following tests.


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_136.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname2_43.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname3_19.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname4_10.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname5_4.jpg



If you need further assistance, just let me know.

Hope this helps..
Thanks for using 2CarPros.com!
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Thursday, January 15th, 2009 AT 1:09 AM
Tiny
KERRIN777
  • MEMBER
Sorry, guess I should have informed you that I don't have the testing machine - I am using the information the guys at autozone told me. I was trying to see if it was something simple that could be fixed without going to the mechanic. Most of your answer was unfamiliar to me. Is there a way you can simplifly it. I may not have realized that this is a forum for "mechanically inclined" people.

Also - when I registered, after the donation - your website had a button that said "ask your querstion" - "question" is misspelled. Just fyi :)

Thanks!
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Thursday, January 15th, 2009 AT 7:59 AM
Tiny
BLUELIGHTNIN6
  • EXPERT
Okay, no problem. This site is for everyone which is why I stated you can just let me know if you need more assistance. Obviously we do not know the skill level of every poster so I go by what the poster has stated and how it was worded.

Anyways, so basically a mutiple misfire can be multiple things. It can be a vacuum leak in the engine compartment, timing could be off a little, all clyinders may not have proper compression, faulty/clogged fuel injectors, faulty wiring . And the list does go on as shown in previous post. If you do not have any tools such as a fuel pressure gauge or compression gauge then you can't really perform the proper diagnostic procedures for a multiple misfire engine. You can visually inspect the vacuum hoses and other components such as timing belt/chain to ensure that they are good.

Hope this helps. And thanks for the FYI
Thanks for using 2CarPros. Com!
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Thursday, January 15th, 2009 AT 12:43 PM

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