Volvo RWD S90-V90 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 10/2018 S90-V90 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Oleg_S90 on  Wed May 12 03:19 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Feb 10 10:06 CST 2007
[RELATED]

Dear Collegues,
I have purchsed S90 3.0 auto from Germany and faced with unstable idle run. I have replaced almost all electronic devices but got NO effect. My local VCC representative recognized the problem as ECU failure.
Did anybody faced with the such problem?
Thank you!

Oleg







  REPLY TO THIS MESSAGE    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Token Ring Man on  Wed May 12 18:52 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

What do you mean by unstable idle.
--
Warren Bain - '99 V70GLT G-Valve > 80K mi, 89 300SE, '96 965 >120Kmi, near Manassas Va.. Check the 700/900 FAQ via the 'features' pull down menu. This post written with 100% recycled electrons.








  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Oleg_S90 on  Wed May 12 19:44 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Feb 10 10:06 CST 2007
[RELATED]

Engine is unstable at idling (floating +\- 50 revs) and stuttered until it got to 2,000 rev. per minute. This was particularly noticeable when the engine was cold.








  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

uid 11300's pic
posted by  Gregski [V90] on  Wed May 12 20:02 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

throttle body clean?
hmm...
--
Gregski; european V90 '97 B6304FS2 AW3043 IGS HID








  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Oleg_S90 on  Wed May 12 21:27 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Feb 10 10:06 CST 2007
[RELATED]

Yes!
Moreover I have changed: MAF sensor, spark coils, injectors, idle run valve, temperature-sensing device, spark plugs, cleaned throttle blade, checked catalyc converter and Lambda sonds.... OBD2 does non show any failure...








  REPLY TO THIS MESSAGE    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Token Ring Man on  Thu May 13 20:20 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

Clean your throttle body, replace the flame trap and clean the idle air bypass valve. Don't assume the ECU is bad, I've never had one fail.

Check for vacuum leaks as well.
--
Warren Bain - '99 V70GLT G-Valve > 80K mi, 89 300SE, '96 965 >120Kmi, near Manassas Va.. Check the 700/900 FAQ via the 'features' pull down menu. This post written with 100% recycled electrons.








  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

uid 11300's pic
posted by  Gregski [V90] on  Wed May 12 05:30 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

[b]My local VCC representative recognized the problem as ECU failure.
Did anybody faced with the such problem?[/b]

did they try to put in new ECU and to see result?

--
Gregski; european V90 '97 B6304FS2 AW3043 IGS HID








  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

ECU problem S90-V90 1998

posted by  Oleg_S90 on  Wed May 12 18:14 CST 2004
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Feb 10 10:06 CST 2007
[RELATED]

The problem is that my car has an immobilizer. Based on Rep. office info after new one is installed and ignition turned on first time the immobilizer code should be entered, so new ECU and immobilizer will work together. The main problem is that if ECU replacemend will not eliminate the trouble I will not able to return it back as ECU is already customized to my immobilizer. To return back I need to zero-back ECU, but I suppose that for security reason dealer can not do that....







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.