2004 Dodge Caravan Rough idle

Tiny
RONANDPIXIE2006
  • MEMBER
  • 2004 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
My van seems to be riding rough. Seems like it wants to turn off. Never has, but it comes close even while Im driving. It gets worse or more noticable when the AC is on. Thanks is advance for your advice!
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Tuesday, August 3rd, 2010 AT 6:02 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Has the check engine light come on? Have you checked for vacuum leaks? Finally, have you checked fuel puressure and when was the last tune up?

Let me know.
Joe
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Tuesday, August 3rd, 2010 AT 11:25 PM
Tiny
RONANDPIXIE2006
  • MEMBER
Yes, the engine light is on. It's been on since we purchased the van (used) in 2009. We've had diagnostics run on it time & time before and nothing came up on the "machine". This last time it was run it came up with the code notifying us that and EO2 sensor needed to be replaced. Times are tough and we hadn't had the $ to replace it. That's about all that's been done to it since the roughness started. Which was about 3 wks ago. Could this be the problem? Because the sensor wasn't changed things got worse? A tune-up was done (according to the shop mechanice at the used dealership we purchased the van from) 6 mts before we purchased the van. Could it need a tune-up? How would we go about checking the fuel pressure? This is our 1st time purchasing a used vehicle, so we are not at all sure what to do or what we should of done. Thanks again for replying. Your help is greatly appreciated! Have an awesome day!
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Wednesday, August 4th, 2010 AT 12:36 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Here is a how to for checking fuel pump pressure:

http://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

As far as the O2 sensor, yes it could be causing a rough idle. Also, check for vacuum leaks.

Let me know what you find.
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Wednesday, August 4th, 2010 AT 7:50 PM
Tiny
RONANDPIXIE2006
  • MEMBER
Thank you so much for the link! I will get my husband to do the check as soon as possible. He's a corrections officer and works noon till 11 pm, so as soon as he's able to do a fuel check, I will definately let you know. Do you happen to know where the O2 sensor goes? My husband has no clue. We could change it asap. We are planning a trip out of town on the 28th and want to get this taken care of before then. Thanks so much for you help. I will get back to you as soon as possible.

P.S. We have the repair manual, the one Autozone sells.
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Wednesday, August 4th, 2010 AT 9:08 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I'm glad to help. As far as the O2 sensor, it is on the exhaust system between the engine and the catalytic converter. Also, have him check for vacuum leaks under the hood. They can cause these problems too.

Let me know what you find or if you have other questions.

Joe
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Wednesday, August 4th, 2010 AT 9:13 PM

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