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Idle speed bucking like a wild horse!!!!

  #1  
Old 09-28-2009, 06:30 PM
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Exclamation Idle speed bucking like a wild horse!!!!

Any Idea what would cause my S80 to al of a sudden only at idle speed surge?? alomost stalling then recovers to 1200 rpm then down then up then down? I disconected the Battery now seems to be a alittle smother!!!
 
  #2  
Old 09-28-2009, 07:19 PM
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Try cleaning the throttle body and see if it helps.
 
  #3  
Old 09-28-2009, 07:36 PM
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Is this a simple job?
 
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Old 09-28-2009, 07:37 PM
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It is not to bad. The throttle body is under the intake manifold.
 
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Old 09-28-2009, 07:42 PM
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So I need to remove the Intake manifold?
 
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Old 09-28-2009, 07:49 PM
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No you do not. Is it turbo or Non?
 
  #7  
Old 09-28-2009, 08:07 PM
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Twin turbo
 
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Old 09-28-2009, 08:10 PM
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There is a hard plastic pipe from the intercooler to under the intake. You need to remove that pipe. Where it connects under the intake is at the throttle body. Then remove the throttle body and clean it. You will need to get a gasket first.
 
  #9  
Old 09-28-2009, 08:14 PM
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Great thanks a lot I will try tommorow
 
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Old 09-28-2009, 08:18 PM
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Let me know how it goes.
 
  #11  
Old 09-29-2009, 09:48 AM
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well took it off and disconected the wire. pulled her out and cleaned it up just a little juicy looking carbon in side but there is some evedence of oil in the intake pipes is this normal? After assembly start and run it and it seems fine but I will let her run to get hot and see what happens.

At the same time I here a motor whine from the power steering pump and or the alternator. I use a screw driver to my ear to listen and the sound seems to be equal from both the alternator and pump how can I tell?
 
  #12  
Old 09-29-2009, 10:05 AM
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Well pulled it aff and cleaned a little carbon oil out and put her back on I do see a little oil in the intake pipes is this ok?

I will drive it hard to see if it starts surging again but is ok now.

As well I have a power steering or alternator whine how do I tell? I did the screw driver to ear trick but the sound is the same!!!
 
  #13  
Old 09-29-2009, 06:56 PM
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You will always have a little bit of oil in the pipes.
Is the steering fluid low?
Is the fluid bottle broke internally?
 
  #14  
Old 09-29-2009, 08:00 PM
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Good to here thought the Turbos were going!! I took her for a hard drive and 1 block from my house blew a coolant hose going to the heater core from the head!!!
As for the fluid I had just changed the HP power steering hose 1 week ago and all has been well. It sure sounds like a pump whine but the Alt has the same sound with the screw driver. I did empty the PS resivoir and add a can of the Lucas additive to see if the noise changed but no auditable sound change.
 
  #15  
Old 09-29-2009, 08:02 PM
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When you had the bottle empty was there a plastic piece laying in the bottom?
 
  #16  
Old 09-29-2009, 08:25 PM
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Never saw one it goes right down to the large drain tube on the bottom
 
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Old 09-29-2009, 08:29 PM
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There should be one attached to the top of the bottle where the return hose attaches at the bottle. Inside is where it attaches and goes to the bottom. If it falls if it sounds like it is low on fluid because it is airating the system.
 
  #18  
Old 09-29-2009, 08:33 PM
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There is a small shield there Thanks
 
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Old 09-29-2009, 08:33 PM
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Bad
Name:  Powersteeringbottle005.jpg
Views: 17
Size:  39.4 KB
Good
Name:  Powersteeringbottle004.jpg
Views: 21
Size:  39.8 KB
 
  #20  
Old 09-29-2009, 08:47 PM
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I just compared your great pics to mine and mine is the good one
Thanks for the great pics
 

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