Re: [DML] Idle gradually increased to 1700 RPM during warm up

[Jake Kamphoefner <jakekamp@xxxxxxx>]

Hey Dennis,

That seems like the symptom of a failed ECU.  The easiest way to check is to swap with a good one.  I think I've got a spare in my closet if you need it!

If that's it, I think Elvis Notica on this list was repairing them pretty successfully (foggy memory, so forgive me if I am wrong).

Jake Kamphoefner
1063

 



________________________________
From: dmc_5180 <dmc_5180@xxxxxxxxx>
To: dmcnews@xxxxxxxxxxxxxxx
Sent: Sunday, May 17, 2009 8:51:54 PM
Subject: [DML] Idle gradually increased to 1700 RPM during warm up





This is a never before seen problem on my car during my 16 years of ownership. I went to start the car this afternoon , it had not not been driven since the DMCMW open house weekend 3 weeks ago. The car fired right up as usual Idle was stable at 775 +/- 25 with a very subtle hunt but virtually stable. I walk away from the car after 20-30 seconds I'm letting it warm up. I was getting a few things from the trunk of my other car to put in the D. While I had my head in the trunk of the other car The RPM starts to gradually increase on the D. I did not think too much about it Figuring that the Idle Micro switch might not be tripped. I walk back over the D get in driver seat to see the IDLE is at a steady 1700 RPM . I tap the Pedal a few times NO change. OK, I Go back to engine bay to make sure the Micro switch is depressed. It IS. Then I happen to Look down at the Left EXHAUST HEADER. This Is a JET-HOT coated system. The header starts GLOWING and IS
 increasing rapidly. I do a quick check of the Right Header which appears to NOT be turning colors at this point. FYI I was in a rather dark building at the time so it was fairly easy to see the heat GLOW. Well I've never had this happen before. and As the header starts turning very RED rather quickly , I Shut it down immediately. While the engine was shutting, down I hear a woooof sound in the exhaust, almost like I flame igniting. The exhaust header quickly turns back to normal color. I wait about a minute then start the engine again. Idle is steady at 1700. The scary part for me was the Left exhaust appearing to be much hotter than the right. Again I did not notice the Right side turning color as the left did. This is a STAGE I exhaust. both sides are independent each with a CAT. I thought about the possibility of maybe a plugged CAT but I'm not so sure about that. Any thoughts of what may have caused my idle to increase like that?

Dennis




[Non-text portions of this message have been removed]



------------------------------------

To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/dmcnews/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:dmcnews-digest@xxxxxxxxxxxxxxx 
    mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/