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Discussion Starter #1
Greetings. My 2009 gas v6 has an idle in neutral that oscillates between about 800-1500. Noticed at lower speeds with cruise control it accellerates and decellerates on it's own. At lower RPM when cold it is a rough idle too.

Is there something to adjust or is it a bad module, or sign I should buy a new car?

Thanks.
 

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Vacuum issues maybe among lots of other issues. Do you have a scanner or a vcds cable?
If so scan and upload the log here please.


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Discussion Starter #3
Thank you for your reply. I don't have a scanner, but there has been a clue to a vacuum issue in the codes my local shop ran a few months ago, so you are right on. I will have that examined and fixed next week.
 

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Are you doing the job yourself or having a mechanic work on the Treg?
If you intend to keep the Treg I steongly advice you to get a vcds cable. It’s 199$ and will save you time and money.



Now I will give you some helpful info to troubleshoot the vac issue. I will put a link here to what you need to check.
You probably have a pcv issue too. What is the mileage and the service history of this Treg?


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Discussion Starter #5
Greetings. It has had full service as recommended. It has 218k miles on it. Recently did the front end and struts, as the engine and tranny seem strong still.
 

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Discussion Starter #7
Are you doing the job yourself or having a mechanic work on the Treg?
If you intend to keep the Treg I steongly advice you to get a vcds cable. It’s 199$ and will save you time and money.



Now I will give you some helpful info to troubleshoot the vac issue. I will put a link here to what you need to check.
You probably have a pcv issue too. What is the mileage and the service history of this Treg?


Sent from my iPhone using Tapatalk
Thank you for the information and link to the vcds cable. I am planning to have a mechanic take this over. I don't have the time these days. Also think there is a brewing problem with the oil pump on this treg I need to research.
 
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