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Piston Misfire

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Old Jun 22, 2007 | 09:58 PM
  #1  
I Hate Problems's Avatar
I Hate Problems
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Default Piston Misfire

[hr]I Have A 1999 Dodge Avenger V6 2.5
I Am Having A Misfire Problem on My 4th And 5th Piston
I Have No Idea What To Do i Have Changes The Cap And Rotor, Spark Plugs And Wires, Fuel Filter, And Crankshaft Position Sensor...Can Someone Please Tell Me What Is Wrong im A High School Kid And Don't Have Money To Be Wasting On What Is not Solving My Problem...Oh Yea And My Car Is Losing Acceleration And It Is Just Getting Worse...I Think It Has Something To Do With My Compression
 
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Old Jun 24, 2007 | 11:45 PM
  #2  
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silvercoupe97
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Default RE: Piston Misfire

If you can do the compression test yourself, you would save yourself some money. Although it sounds electrical, especially if your car is losing acceleration "fast". It's hard to tell though. Compression loss doesn't happen in terms of days unless you have really bad rings/pistons/block, but you would be able to hear/feel even a mild grinding if that were the case. Not to mention metal flakes in your oil. Your case maybe different than others, it may not be.
Do you hear grinding within the motor? How old is your oil, do you see flakes in it? There's a cam sensor built into the distributor shaft in the 2.5L motors. That's another sensor that can give issues similar to yours.
The cam and crank sensors work in conjuction to give the ECU proper motor timing so that it can spew out proper ignition/fuel timing.
 
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