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Chrysler Grand Voyager 2005 v6 3.3 wont go past 2500 RPM problem

  #1  
Old 02-08-2012, 09:29 PM
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Default Chrysler Grand Voyager 2005 v6 3.3 wont go past 2500 RPM problem

Hello,
I have a Grand Voyager 2005 v6 3.3 petrol & i have a problem with it
It was an old problem that went away but has recently returned
The car drives fine, starts fine & changes gears fine (automattic) but when it hits 2500 rpm it wont rev anymore & wont drive it actually jerks back & forth but as soon as i go below 2500 rpm it drives fine, I have changed oil, spark plugs, oil filter, injectors were removed & cleaned & new cam & crank sensor but the problem is still there.

PLEASE HELP
 
  #2  
Old 02-09-2012, 01:39 AM
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I would suspect a fuel pump that can't keep up with demand. Connect a fuel pressure gauge and see how close it comes to the 55 psi spec.
 
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Old 02-09-2012, 03:49 AM
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thank you i will book the car in with a local mechanic as here in Australia the Chrysler Dearler mechanics are useless, twice they tried to repair it & both times the problem was still there & now they are telling me i need to replace the wiring harness.
 
  #4  
Old 02-09-2012, 02:08 PM
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Did they change anything the first two times? Which harness? Were you getting a check engine light and did they check for codes?
 
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Old 02-09-2012, 07:19 PM
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In addition, max 2500 RPM can be an issue with cam and crank sensors not being in sync for some reason. A bad cam sensor, crank sensor, timing chain stretched (highly unlikely) or a broken and shifted flexplate. If they can read the PCM data, tell them to look at CAM/CRANK Difference. Also tell us the codes that they pulled...if any. Guessing P0016 and/or P0344/P0340

Don't give them too much grief. I doubt there are very many training centers and/or opportunities to see issues with "foreign" cars. But, under NO circumstances let them replace your wiring harness. That is a shot in the dark that almost always ends badly.
 

Last edited by TNtech; 02-09-2012 at 07:23 PM.
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Old 02-14-2012, 10:15 PM
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Regarding the broken and shifted flexplate it actually broke last night so i have to pull gearbox out to replace it so hopefully that this is the problem
 
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Old 02-15-2012, 09:12 AM
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Well, at least you know what it is now. When you get it out you will see the tone ring that the crank sensor reads. If it shifts just a little, it throws off the sync with the camshaft sensor. What happened was that the center separated enough to allow the flexplate to shift a few degrees. Sometimes it takes quite a while for it to completely separate though.
 

Last edited by TNtech; 02-15-2012 at 09:15 AM.
  #8  
Old 03-11-2012, 03:49 AM
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replaced broken flex plate but the problem still there now it wont even start well it will start after about 30 seconds sometimes longer as it keeps cranking over & when i finally get it started it still will only rev to 2500 RPM

anymore advice please
 
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