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Chrysler 300: Problems & Solutions - READ ONLY

1124 messages,  Last post on Oct 12, 2006 at 2:38 PM

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What is this discussion about? Chrysler 300, Sedan


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#1108 of 1124
My 2005 Chrysler 300 2.7ltr is getting 16.5 MPG city! by chrysler300guy
Sep 06, 2006 (11:29 pm)
My Fiance and I purchased our car with only 15,580 miles June of 2005 and everything was great up until a few months ago. We now have 27,000 miles on it.
 
We found that we were filling up more frequently so I began monitoring MPG. The car went from 21MPG to 16.5MPG.
 
I have been on top of the maintenance and even doing maintenance earlier than suggested.
 
1. Oil changed every 3 months (approx. 2600 miles).
 
2. Just had Recall work done to transmission so tranny fluid has been replaced.
 
3. Had radiator flushed at last oil change.
 
4. Replace engine air filter when dirty. (inspect once a month) Just purchased K&N High Performance Filter that is designed for the stock intake housing. "Has gained the engine more horsepower but has not changed the fuel efficiency."
 
5. Get tires rotated at every oil change.
 
PCV valve is being replaced next week.
 
Does anyone know what could be wrong?
#1109 of 1124
Re: My 2005 Chrysler 300 2.7ltr is getting 16.5 MPG city! [chrysler300guy] by xtec
Sep 07, 2006 (10:17 am)

Replying to: chrysler300guy (Sep 06, 2006 11:29 pm)

I put a K&N filter on my car and went from 20mpg to 18.I lost power and MPGs with the K&N.I put the stock filter back in which is a high flow filter and everything went back to normal.I would try fuel injection cleaner on your next fill up.With 27k there could be dirty injectors that will kill mileage.Make sure you get a name brand that says super concentrate on it.
#1110 of 1124
Re: My 2005 Chrysler 300 2.7ltr is getting 16.5 MPG city! [xtec] by chrysler300guy
Sep 07, 2006 (6:24 pm)

Replying to: xtec (Sep 07, 2006 10:17 am)

Thanks XTEC. I will definately give a fuel injector cleaner a try on my next fill up tomarrow. I hope that will resolve the problem along with the PCV valve change.
 
I have been using fuel from QT (Quick Trip) since I have had my car. I decided that I would change back to CHEVRON fuel on my last fill up since I have never had a bad experience using CHEVRON fuel on my past vehicles.
#1111 of 1124
Cruise Control question by vic10
Sep 13, 2006 (8:26 am)
I drove a company 2001 Intrepid for a couple of years and when in cruise control, not only would it accelerate to maintain speed uphill, but it would also downshift to maintain speed downhill. Was great for driving through the Adirondacks. My 300C doesn't maintain speed downhill--not a big issue in OK but still, it's a feature I miss. Any idea why it wasn't maintained?
#1112 of 1124
Re: Cruise Control question [vic10] by lacade
Sep 14, 2006 (8:00 am)

Replying to: vic10 (Sep 13, 2006 8:26 am)

The downshift to maintain speed is only available with the 4 speed automagics.
#1113 of 1124
Re: Cruise Control question [vic10] by greyfox1
Sep 18, 2006 (5:31 pm)

Replying to: vic10 (Sep 13, 2006 8:26 am)

The reply by lacade is incorrect. I have a '06 300C and it does downshift as needed in cruise. We drove the hills of South Dakota, Wyoming, and Montana last summer and the cruise maintained really well, including downshifts when needed. This summer in the mountains of Colorado, autostick worked extremely well,also.
#1114 of 1124
Re: Cruise Control question [greyfox1] by lacade
Sep 19, 2006 (7:43 am)

Replying to: greyfox1 (Sep 18, 2006 5:31 pm)

Hmm, I am sure I read it in some mag that the C didn't downshift. I stand corrected.
#1115 of 1124
Re: Cruise Control question [lacade] by xtec
Sep 19, 2006 (10:15 am)

Replying to: lacade (Sep 19, 2006 7:43 am)

If you read your owners manual it states the speed control system maintains speed up and down hills.A slight speed change on moderate hills is normal.Most people questions could be answered if they read their owners manual.
#1116 of 1124
Re: Cruise Control question [xtec] by vic10
Sep 20, 2006 (10:05 am)

Replying to: xtec (Sep 19, 2006 10:15 am)

Although you're both right, I still don't have my answer. Just went out to check the manual and it does state the system will maintain speed uphill and downhill. It also states that the FOUR speed transmission may downshift to maintain speed. Doesn't say what the Hemi's FIVE speed will do. Mine doesn't downshift and it doesn't maintain speed downhill so looks like I have a question for the dealer at the 24K check.....
#1117 of 1124
Re: Cruise Control question [vic10] by xtec
Sep 20, 2006 (10:19 am)

Replying to: vic10 (Sep 20, 2006 10:05 am)

The manual does mention autostick mode.It should work with any transmission 3-4-5 speeds.The purpose of cruise control is to keep the speed you set.Like the manual says on moderate hills speed will change.If you speed control is not holding the speed you set going up or down hills that aren't steep,then you do have issue with your cruise control.I had a Eagle Vision that wouldn't hold speed going up hills,and they changed the module and took care of the problem.Good luck.

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