Surging at idle
 

Hi everyone,

I have a 99 S80 with the 2.9 and it has developed a surge at idle. It is fine when cold but once it warms up it surges from approximately 650 to 1200 RPMs. It is a constant rythm with a slight "air escaping" sound coming from the area of the intake. Have checked all hoses and can't find a leak. It is my fiance's car so I am not all that familiar with it's other quirks yet. Any ideas anyone?

Dave

RE: Surging at idle
 

Has it had the ETM recall software?

RE: Surging at idle
 

I believe so. My fiance got the car in 2003 and the original owner said that she had recall work done on the car.

Dave

RE: Surging at idle
 

I would Double check with the Dealer the Recall came out last year or early this year.

The Dealer can run the Vin# and tell you if there is a open recall.

RE: Surging at idle
 

I ran the vin number and there is not an open recall for it. Too bad, that might have been a real easy fix. Any other suggestions, I really appreciate your help.

Dave

RE: Surging at idle
 

I would double check, S80's manufactured between 5/11/98 to 8/27/01 are involved in the recall.

V70 2.4t

RE: Surging at idle
 

If the software has been done then try to get the check engine light to come on with throttle body codes and they will replace it for free.

Has the check engine light been on?

Has the throttle body been cleaned lately?

RE: Surging at idle
 

I talked to another dealer today and he said there is a recall and they will download the software tomorrow morning (recall 155). Thank you for your info. Hopefully this will take care of that situation.

Another question, do you need any special tools to put struts on the 99 S 80 or is it a fairly easy switchout?

Thank you again for all your help,

Dave

RE: Surging at idle
 

You really should have a special wrench to remove the second nut.

BUT a Pipe wrench will work good as well.

You will need a torxes socket as well to hold the center of the strut.

RE: Surging at idle
 

You are a genius! They downloaded the software and it runs great! At the dealer I pulled up next to two other S80's with the same problem. They all almost surged in unison!

They told me the struts are fine but the seats above the struts are broken. Will I need a special tool for that repair?

They also said the top motor mount is broken. I am going to replace that too.

Your help has been amazing.

Dave

RE: Surging at idle
 

You can use a pipe wrench and torxes socket to remove the Nut.
You need a spring compressor to compress the spring.