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Misfires and accleration while idle

Tiny
JEFE40472
  • MEMBER
  • DODGE INTREPID
I have a 2000 Dodge Intrepid and while Idle, it misfires and accelerates up and down. When driving, it misfires every 2 to 3 seconds. I took it to AutoZone and the computer put out Code P0300 - Cylinder Misfire detected - Random Cylinders.

I replaced all the spark plugs and 2 of the coils. It still does the same thing. It said that they were Cylinder 1 and 4 which I assumed are the two bottom cylinders if standing infron of the vehicle. What else could it be? Someone told me it might be the computer. Any hlep would be great!
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Saturday, May 19th, 2007 AT 8:13 PM

2 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
It sounds like you have a vacuum leak. Spray some intake cleaner around the perimeter of the intake and see if the idle flucuates at all. Check for any other source of a vacuum leak should nothing turn up on the intake manifold.
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Saturday, May 19th, 2007 AT 8:19 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Servicewriter is right about the vacuum leak and may I add to it Bad gas. P0300 is like the globe trotters bouncing around the court and onone knows where the ball is. This code is a hard one to deal with.

Try checking the EGR system


https://www.2carpros.com/forum/automotive_pictures/12900_12900_muah1_5_6.gif

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Sunday, May 20th, 2007 AT 2:59 AM

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