Troubleshooting & Technical Questions & Modifications Have technical or modification questions about the Crossfire? Find out the answer, or give advice in here!

High rpm idle

Thread Tools
 
  #1 (permalink)  
Old 07-26-2017, 08:48 PM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default High rpm idle

https://youtu.be/zN8IlBOcc-U

been having this issue for weeks. I'll start the car, let it warm up and then I'll shut off...I then tap the gas pedal and let go and it holds like I'm still on it. Any help would be great. Recent work done before this issue was replaced water pump belt tensioner and idler pulley and also egr valve along with the rcm resolder. I replaced the egr thinking it was that causing the issue. Then had the rcm resolder by DJ Tighe thinking it would solve the problem, but no. Please please please please any ideas?
 

Last edited by IamNIkoSuave; 07-26-2017 at 08:49 PM. Reason: Title
  #2 (permalink)  
Old 07-27-2017, 08:01 AM
waldig's Avatar
Senior Member
Join Date: Feb 2008
Location: VA
Age: 77
Posts: 4,510
Received 27 Likes on 21 Posts
Talking Re: High rpm idle

Are you saying the pedal stays down after the engine STALLS? Need more info, Woody Manassas va.
 
  #3 (permalink)  
Old 07-27-2017, 09:43 AM
onehundred80's Avatar
Senior Member
Join Date: Apr 2006
Location: Ontario
Age: 84
Posts: 25,364
Received 535 Likes on 452 Posts
Default Re: High rpm idle

Originally Posted by waldig
Are you saying the pedal stays down after the engine STALLS? Need more info, Woody Manassas va.
Good question, people tend not to answer posts that are not at all clear. It's tough to answer questions that are not clear.
 
  #4 (permalink)  
Old 07-27-2017, 09:58 AM
NeedsWings's Avatar
Senior Member
Join Date: Jan 2007
Location: Michigan
Posts: 2,623
Received 61 Likes on 48 Posts
Default Re: High rpm idle

I'm thinking dying throttle body. good time for a forced upgrade to a srt6 74mm tb that will swap right in, they can be had for $50 on ebay
 
  #5 (permalink)  
Old 07-27-2017, 10:50 AM
Join Date: Jun 2016
Location: Concord
Age: 69
Posts: 261
Likes: 0
Received 2 Likes on 2 Posts
Default Re: High rpm idle

Originally Posted by NeedsWings
I'm thinking dying throttle body. good time for a forced upgrade to a srt6 74mm tb that will swap right in, they can be had for $50 on ebay
​​​​ if it's fly-by-wire then why would the pedal stay down when it stalls🤔. Inquiring minds need to know 😉 feedback from the throttle body Maybe?
 

Last edited by Kingdav1954; 07-27-2017 at 10:52 AM. Reason: Correction
  #6 (permalink)  
Old 07-27-2017, 10:54 AM
NeedsWings's Avatar
Senior Member
Join Date: Jan 2007
Location: Michigan
Posts: 2,623
Received 61 Likes on 48 Posts
Default Re: High rpm idle

unless I am misreading, I don't think the pedal stays down, but rather the rpms stay up when the pedal is released as it is spring loaded to un-depress. there is nothing mechanical/electrical that would hold the pedal depressed
 
  #7 (permalink)  
Old 07-27-2017, 11:12 AM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default Re: High rpm idle

Originally Posted by NeedsWings
unless I am misreading, I don't think the pedal stays down, but rather the rpms stay up when the pedal is released as it is spring loaded to un-depress. there is nothing mechanical/electrical that would hold the pedal depressed
I hit the pedal and let go, the rpms still stay but I'm not on the pedal anymore. I posted a link for the video to help understand.
 
  #8 (permalink)  
Old 07-27-2017, 11:16 AM
Join Date: Jun 2016
Location: Concord
Age: 69
Posts: 261
Likes: 0
Received 2 Likes on 2 Posts
Default Re: High rpm idle

Originally Posted by NeedsWings
unless I am misreading, I don't think the pedal stays down, but rather the rpms stay up when the pedal is released as it is spring loaded to un-depress. there is nothing mechanical/electrical that would hold the pedal depressed
🤔 I don't know' the Op said I start the car let it warm up then" I'll shut it off" and then tap the gas pedal and "it stays down "as if I'm still pressing it. According to what the Op wrote, sounds like it's not running. I don't know maybe they just didn't use the right phrase.
 
  #9 (permalink)  
Old 07-27-2017, 12:03 PM
Join Date: Jun 2016
Location: Concord
Age: 69
Posts: 261
Likes: 0
Received 2 Likes on 2 Posts
Default Re: High rpm idle

Originally Posted by IamNIkoSuave
https://youtu.be/zN8IlBOcc-U

been having this issue for weeks. I'll start the car, let it warm up and then I'll shut off...I then tap the gas pedal and let go and it holds like I'm still on it. Any help would be great. Recent work done before this issue was replaced water pump belt tensioner and idler pulley and also egr valve along with the rcm resolder. I replaced the egr thinking it was that causing the issue. Then had the rcm resolder by DJ Tighe thinking it would solve the problem, but no. Please please please please any ideas?

Now I understand when you said shut off you did not mean turn the engine off you meant let up off the accelerator pedal 👍 I got your meaning now
 
  #10 (permalink)  
Old 07-27-2017, 12:30 PM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default Re: High rpm idle

Originally Posted by Kingdav1954
Now I understand when you said shut off you did not mean turn the engine off you meant let up off the accelerator pedal 👍 I got your meaning now
Sorry, actually trying to describe this in written form is complicated. When I first crank it up, it'll idle fine. I can hit the gas pedal and it'll rev then drop back to normal idle. Now I shut the car off and turn it back on to make sure I dont get the high idle before actually start to drive...I hit the pedal the rpms hold at around 2k as if I'm still on the pedal but I'm not. If you watch the video, you'll see what I mean.
 
  #11 (permalink)  
Old 07-27-2017, 12:32 PM
ala_xfire's Avatar
Senior Member
Join Date: Dec 2010
Location: Lineville, AL
Age: 79
Posts: 12,783
Received 153 Likes on 141 Posts
Default Re: High rpm idle

And what video would that be ?
 
  #12 (permalink)  
Old 07-27-2017, 12:39 PM
maggy55's Avatar
Forum Regular
Join Date: Feb 2017
Location: Santa Rosa
Age: 68
Posts: 362
Likes: 0
Received 17 Likes on 15 Posts
Default Re: High rpm idle

Originally Posted by ala_xfire
And what video would that be ?
Check his first post
 
  #13 (permalink)  
Old 07-27-2017, 12:44 PM
ala_xfire's Avatar
Senior Member
Join Date: Dec 2010
Location: Lineville, AL
Age: 79
Posts: 12,783
Received 153 Likes on 141 Posts
Default Re: High rpm idle

Originally Posted by maggy55
Check his first post
O yea. Thanks !
 
  #14 (permalink)  
Old 07-27-2017, 02:15 PM
Join Date: Jan 2017
Location: Near Capitol Raceway, Maryland
Age: 39
Posts: 116
Likes: 0
Received 1 Like on 1 Post
Default Re: High rpm idle

I watched the video. That seems dangerous. You rev up and then the engine doesn't rev back down.
 
  #15 (permalink)  
Old 07-27-2017, 02:37 PM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default Re: High rpm idle

Originally Posted by TheThomaswastaken
I watched the video. That seems dangerous. You rev up and then the engine doesn't rev back down.
Yes I'm afraid to actually put it in gear and drive it
 
  #16 (permalink)  
Old 07-27-2017, 03:46 PM
Join Date: Jan 2017
Location: Near Capitol Raceway, Maryland
Age: 39
Posts: 116
Likes: 0
Received 1 Like on 1 Post
Default Re: High rpm idle

Going with needswings comment,

Can try this for an easy, cheap possible solution.
 
  #17 (permalink)  
Old 07-27-2017, 04:01 PM
Padgett's Avatar
Senior Member
Join Date: Oct 2013
Location: Orlando
Posts: 2,145
Likes: 0
Received 35 Likes on 34 Posts
Default Re: High rpm idle

Video sure looks like the butterfly is sticking open. Have you tried opening the hood and closing by hand ? (is it reachable ?)
 

Last edited by Padgett; 07-27-2017 at 04:05 PM.
  #18 (permalink)  
Old 07-27-2017, 04:02 PM
onehundred80's Avatar
Senior Member
Join Date: Apr 2006
Location: Ontario
Age: 84
Posts: 25,364
Received 535 Likes on 452 Posts
Default Re: High rpm idle

Originally Posted by IamNIkoSuave
Sorry, actually trying to describe this in written form is complicated. When I first crank it up, it'll idle fine. I can hit the gas pedal and it'll rev then drop back to normal idle. Now I shut the car off and turn it back on to make sure I dont get the high idle before actually start to drive...I hit the pedal the rpms hold at around 2k as if I'm still on the pedal but I'm not. If you watch the video, you'll see what I mean.
You say when you first start, by that do you mean when it is cold and the first start of the day?
How long before it starts OK and the trouble starts again? After it has cooled down again?
I'm guessing air leak, did it just start acting like this suddenly?
 

Last edited by onehundred80; 07-27-2017 at 04:06 PM.
  #19 (permalink)  
Old 07-27-2017, 04:19 PM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default Re: High rpm idle

Originally Posted by TheThomaswastaken
Going with needswings comment, https://www.youtube.com/watch?v=41yFXjibtLY

Can try this for an easy, cheap possible solution.
if its the throttle body...im just going to upgrade to the 74mm. I bought one a year ago and never installed it...couldn't hurt
 
  #20 (permalink)  
Old 07-27-2017, 04:20 PM
IamNIkoSuave's Avatar
Thread Starter
Join Date: Oct 2015
Location: Hopewell, VA
Age: 36
Posts: 60
Likes: 0
Received 0 Likes on 0 Posts
Default Re: High rpm idle

Originally Posted by onehundred80
You say when you first start, by that do you mean when it is cold and the first start of the day?
How long before it starts OK and the trouble starts again? After it has cooled down again?
I'm guessing air leak, did it just start acting like this suddenly?
just started acting like this. I start it up and let it get warm, cut it off and turn it on immediately after. Tap the pedal and I get the issue
 



All times are GMT -4. The time now is 04:38 PM.