Slow returning to Idle? - Page 2 - Cadillac XLR Forum: XLR and XLR-V Forums
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post #16 of 20 (permalink) Old 04-15-2010, 09:29 AM
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You car should be put on the diagnostic machine. An experienced Cadillac/XLR Tech will turn up the "fault" and the code fairly quickly. Then there is a fairly sophisticated "decision tree" process to isolate the cause.

These diagnostics are printable so ask for your own personal copy.

Please let us know how this comes out for you. (BTW I am betting on a IAC module)

Regards



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post #17 of 20 (permalink) Old 04-20-2010, 09:04 AM Thread Starter
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Originally Posted by XLR I FL View Post
You car should be put on the diagnostic machine. An experienced Cadillac/XLR Tech will turn up the "fault" and the code fairly quickly. Then there is a fairly sophisticated "decision tree" process to isolate the cause.

These diagnostics are printable so ask for your own personal copy.

Please let us know how this comes out for you. (BTW I am betting on a IAC module)

Regards
Dealer #2 says, no fault codes... most recent updates installed. Thinks condition is normal but has little to no experience with Vs. Basically "No Problem Found" but NOT "Can not Duplicate". I'll hook up with another local '06 V next week for a comparison and let you know.
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post #18 of 20 (permalink) Old 04-20-2010, 09:54 AM
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Bill:

Look this is going to sound funny to you but if it were me I would check the air cleaner to be sure it is flowing air properly and if in doubt get a new one. A clogged air cleaner will cause the car to idle up also there are some sensors on the air intake that do malfunction and may not "throw a code" so checking them is prudent as well.

Failing all of this I suggest you call D3 performance (562) 216-8919. http://www.d3cadillac.com

Tell them I sent you. They are on top of all of the idle problem anomolies because the they do performance kits for the XLR and the XLR-V. They may have some ideas that will resolve your issue.

Please keep us informed.

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Jerry



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post #19 of 20 (permalink) Old 04-20-2010, 12:40 PM Thread Starter
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Bill:

Look this is going to sound funny to you but if it were me I would check the air cleaner to be sure it is flowing air properly and if in doubt get a new one. A clogged air cleaner will cause the car to idle up also there are some sensors on the air intake that do malfunction and may not "throw a code" so checking them is prudent as well.

Failing all of this I suggest you call D3 performance (562) 216-8919. http://www.d3cadillac.com

Tell them I sent you. They are on top of all of the idle problem anomolies because the they do performance kits for the XLR and the XLR-V. They may have some ideas that will resolve your issue.

Please keep us informed.

Regards

Jerry
Jerry, Thanks..... Not air filters...brand new K&Ns which picked up almost ten HP on the dyno when I installsed them between pulls. I'm calling D3 now.
Bill
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post #20 of 20 (permalink) Old 07-28-2019, 10:09 AM
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Bill:
I know this is an old thread, but i am just now seeing it. Did you ever figure out what was causing this?

I have a 2006 XLR-V that I got about 3 years ago. About a year ago I put K&N filters in it. (I love them & put them in every vehicle I own, but for some reason didn't do it immediately with the XLR like i usually do)

After replacing the filters i noticed that the car did not decelerate as "aggressively" when I let off of the gas while driving it harder, & that it returned to idle slower when driving it more mellow. I assumed that because the engine is getting more air flow, the ECM is sending more fuel which is causing this condition. I've been kind of torn on whether to change back to the stock filters or not. I can tell there is an increase in power with the K&N filters, but the car definitely feels more aggressive with the stock filters & then of course there is the issue of the slower return to idle...

Now I just want to make sure that there might not be some other issue that coincidentally showed up at the same time as my filter swap.
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