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Chrylser 3.5l wont rev over 2500


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lloyddross
Novice

Jul 6, 2013, 7:23 PM

Post #1 of 8 (1864 views)
  post locked   Chrylser 3.5l wont rev over 2500  

I have a 2004 Chrysler Concorde LXI with 70000 miles. It has a 3.5 litre V6 engine which will not rev over 2500 RPMs and the check engine light is on. This started when I was driving using the cruise control and hit the Accel button to increase speed. It seems like it is governing itself to the 2500 rpm mark. Any ideas?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 6, 2013, 8:37 PM

Post #2 of 8 (1838 views)
  post locked   Re: Chrylser 3.5l wont rev over 2500  

Get the code(s) read first and post the #s and let's go from there,

T



lloyddross
Novice

Jul 7, 2013, 9:40 AM

Post #3 of 8 (1810 views)
  post locked   Re: Chrylser 3.5l wont rev over 2500  

Codes are P300 and P0016. Suggested repairs are timing belt, new spark plugs, new water pump and a flush and fill. Total $1200. I presume flush and fill would be change of coolant when replacing water pump. Don't have the car in front of me but most water pumps fail by leaking and is unrelated to timing, plugs etc. Unless that engine has an electric drive water pump? Any further ideas.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 7, 2013, 10:32 AM

Post #4 of 8 (1805 views)
  post locked   Re: Chrylser 3.5l wont rev over 2500  

Random misfires w cam and crank sensors out of sync would likely be a neglected or plain failed timing belt which I believe also runs the water pump in this engine so it would be suggested. If jumped a tooth you are on borrowed time and have been!

Many engines either can't (if all timing info is off) go over a certain RPM or default to a limp mode limiting RPMs.

FYI - water pumps can fail in a few different ways not just leak. It wouldn't be advised not to change coolant and plugs, probably oil and some other things possible. Pricing is local by your exact shop and area so can't say that's out of line at all. For some it will save your engine if not done!

I wouldn't wait with this and running it anymore is AYOR,

T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 7, 2013, 11:55 AM

Post #5 of 8 (1798 views)
  post locked   Re: Chrylser 3.5l wont rev over 2500  


Quote
Don't have the car in front of me but most water pumps fail by leaking and is unrelated to timing, plugs etc


The water pump is driven by the timing belt so common sense would be to change it at the same time. If the water pump fails at a later date, not only will you have to do the job all over but serious engine damage could occur if it causes the timing belt to come off.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jul 7, 2013, 1:35 PM

Post #6 of 8 (1790 views)
  post locked   Re: Chrysler 3.5l wont rev over 2500  

I thought that's how that engine is set up. New water pump would be suggested and I would in this engine as Hammer said you are back to square ONE if it failed or worse!

T



lloyddross
Novice

Jul 9, 2013, 9:29 PM

Post #7 of 8 (1763 views)
  post locked   Re: Chrysler 3.5l wont rev over 2500  

Thanks, fellows. Replaced the timing belt and the water pump while they were in there. Seems like they thought the plugs should be replaced solely on age of car and mileage and the fact they were the original plugs. Anyway, it seems to be running fine. LLoyd


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jul 10, 2013, 4:39 AM

Post #8 of 8 (1747 views)
  post locked   Re: Chrysler 3.5l wont rev over 2500  

Sounds like responsible work Lloyd. Enjoy not worrying about it for a while.

I'll close thread as fixed/done, keeps spammers out and you may ask any moderator to reopen it at your request,

T







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