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2003 Monte Carlo Lack of Power

Old Aug 2, 2009 | 11:01 PM
  #11  
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Can you save scans with the actron? If you can, go out and replicate the problem while logging a scan and post it to scan depot- that would make it a lot easier.

Make sure you record fuel trims (so we can tell if its starving for fuel), gear, etc- all the normal stuff.
 
Old Aug 2, 2009 | 11:30 PM
  #12  
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Yeah thats what we suspect. The cat isn't getting hot seems okay from the outside.
 
Old Aug 5, 2009 | 12:24 PM
  #13  
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Now it appears to only happen between 2000-3000 rpm. The very second you hit 3000 rpm it takes off like normal. And when you take off from a dead stop it moves and sounds normal till 2000 rpm then it bogs barely making it to 3000.
 
Old Aug 5, 2009 | 03:52 PM
  #14  
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it could be a bad cat. one of my friend had goten a nissan and the cat had to be replaced. it did similar thing to what you described and it took forever to get up to speed.
 
Old Aug 5, 2009 | 04:13 PM
  #15  
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can u log ignition with your scan tool?
 
Old Aug 5, 2009 | 06:15 PM
  #16  
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I lost my CD with the software for my scanner, I sent actron a mail hopefully they will send me the software.
 
Old Aug 5, 2009 | 11:48 PM
  #17  
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i am having the same problem. i just thought it was the car because i am a new owner, but then someone was talking about it and said it should take off. but after i get to 2000 rpm it bogs and you can hear/see/feel the rpms jump..it is kinda hard to get on the express way in the morning sometimes.
 
Old Aug 6, 2009 | 07:02 PM
  #18  
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They aren't going to let me download the software. I saw in another forum a guy lost his software and they sent him download through email. I guess they are hurtin' for money.
 
Old Aug 6, 2009 | 07:56 PM
  #19  
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My cat was restricted and i lost power between 4000 and 5000, take it to the dealer if its under 80k miles it will be under warranty. mine feels like a speed restricter kicks in under heavy accel from 4-5k
 
Old Aug 7, 2009 | 10:43 AM
  #20  
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Maybe you could look at the main sensors while you're scanning and post up what is happening with them then. I would bet almost 99% that those sensors readings will tell you exactly what is wrong, its just a matter of reading the right ones and interpreting them correctly.
 

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