F355 Active suspension problem - Ferrari Life
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 30 Old 06-07-2013, 11:26 AM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
Active suspension problem

OK guys, I really hope that this will be the last "problem" thread that I will post for now (despite I doubt it), but this is the last issue with my car, before getting it to perfection.

When I bought it the active suspension was working, but when they have taken the engine out for the cambelt change, the warning light for the suspension has shown.

So I thought that maybe one of the 2 actuators on the back have been disconnected. However they both work and test themselves when I turn on the ignition key. The other 2 on the front are also working and testing themselves. But the light still stays on...

Any ideas what else on this system can go wrong? I guess if it was the suspension ECU, the actuators would not work, so maybe the ECU is also fine... But what can it be? Anyone had the same problem? The car is '94 (2.7 motronic).
rumen1 is offline  
Sponsored Links
Advertisement
 
post #2 of 30 Old 06-07-2013, 11:51 AM
Owner
Sponsor
 
David @ FluentInFerrari's Avatar
 
Join Date: Feb 2009
Location: Sarasota FL
Ferrari Life Posts: 962
Is the engine still out of the car when the warning light is on?

Sarasota Italian Garage, LLC
Sarasota, FL
www.fluentinferrari.com
[email protected]

**An independent facility with no affiliation with Ferrari SpA**
David @ FluentInFerrari is offline  
post #3 of 30 Old 06-07-2013, 12:46 PM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
No, the engine was put back several months ago. I have actually noticed the light when I drove back the car from the service-station to home.
rumen1 is offline  
 
post #4 of 30 Old 06-07-2013, 08:25 PM
Owner
 
a1exander's Avatar
 
Join Date: Jul 2010
Location: Johannesburg RSA
Ferrari Life Posts: 1,094
There are 2 checks you can do.
Remove the red motors from the shocks and see what the gears look like.
Sometimes the gear breaks and the motor works but does not reach the required arc to tell the controller where it is.

If the gears look ok have a look at the action of the motors whilst they are rotating and see if the movement is strong.
Sometimes the motors die and although they make a noise they do not rotate with sufficient torque.
a1exander is offline  
post #5 of 30 Old 06-08-2013, 04:23 AM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
What I have just saw is that the some of the tooths on one of the rear shock absorbers are missing. I am not sure how many tooths there are in total, but I would say about 30% of them are missing. So maybe that's the issue... But can I buy this little part only?
rumen1 is offline  
post #6 of 30 Old 06-08-2013, 08:37 AM
Owner
 
a1exander's Avatar
 
Join Date: Jul 2010
Location: Johannesburg RSA
Ferrari Life Posts: 1,094
Quote:
Originally Posted by rumen1 View Post
What I have just saw is that the some of the tooths on one of the rear shock absorbers are missing. I am not sure how many tooths there are in total, but I would say about 30% of them are missing. So maybe that's the issue... But can I buy this little part only?
I thought that may have been the case as those little gears do break..

You can order from Ricambi they are sponsors here, I tried to find the part for you as I recall they were advertisng some time back.
I guess you will have to send Daniel a pm/email

http://www.ricambiamerica.com/index.php
a1exander is offline  
post #7 of 30 Old 06-08-2013, 11:59 AM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
I use Eurospares (nevermind they have terrible service), because I work with a company in the UK, which sends things to me very fast.

But I have looked at this diagram and I'm not sure which number is it.



I guess it's the number 13, which is described as "actuator support" (price is 36 euro) , because number 14 is described as a "nut" and it costs 3 euro... What do you guys think?
rumen1 is offline  
post #8 of 30 Old 06-08-2013, 10:56 PM
Owner
 
a1exander's Avatar
 
Join Date: Jul 2010
Location: Johannesburg RSA
Ferrari Life Posts: 1,094
Rumen I shall look for you today and let you know.

It is not No13 and that specific gear is not sold by Ferrari.

The aftermarket has produced that gear as they are known to break.

I was lucky to have some gears sent to me via a friend at Bilstein as I had 2 broken.
a1exander is offline  
post #9 of 30 Old 06-08-2013, 11:03 PM
Owner
 
a1exander's Avatar
 
Join Date: Jul 2010
Location: Johannesburg RSA
Ferrari Life Posts: 1,094
I have sent Daniel a message and hopefully he will contact you.
You can also contact him via pm or e-mail.

Ferrari Life - View Profile: Jack Russell Racing
a1exander is offline  
post #10 of 30 Old 06-09-2013, 04:19 AM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
OK Peter, thank you so much. I am surprised that this isn't sold by Ferrari.
rumen1 is offline  
post #11 of 30 Old 06-26-2013, 01:56 PM Thread Starter
Owner
 
rumen1's Avatar
 
Join Date: Jun 2012
Ferrari Life Posts: 123
OK, got the gear, changed it and nothing.... All gears are perfect now, all the actuators are working, but the light still stays one. What a mistery!
rumen1 is offline  
post #12 of 30 Old 04-24-2015, 05:16 PM
 
Join Date: Jun 2011
Ferrari Life Posts: 14
Can you comment on the resolution to this problem?
gobble is offline  
post #13 of 30 Old 04-24-2015, 06:30 PM
 
Join Date: Jan 2015
Ferrari Life Posts: 156
did you reset it or are you fixing things trying to make it go away?
shootfighter65 is offline  
post #14 of 30 Old 04-25-2015, 05:57 AM
 
Join Date: Dec 2014
Location: NNY
Ferrari Life Posts: 5
Was the car moving when the light came on? Any issues noted with the speedometer? The suspension system ECU utilizes the vehicle speed as one of the inputs. If you start the car multiple times without moving it, the suspension fault light will come on but should go off when the car is moved. Look at the second section of the WSM around page F31 for a better explanation.
NSXn355 is offline  
post #15 of 30 Old 04-25-2015, 10:26 AM
Owner
Elite Member
 
tazandjan's Avatar
 
Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,858
Bill- Welcome to Ferrari Life.


Note: Thread was two years old when Rumen last posted on it.

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
tazandjan is offline  
post #16 of 30 Old 04-25-2015, 12:07 PM
 
Join Date: Jun 2011
Ferrari Life Posts: 14
Quote:
Originally Posted by tazandjan View Post
Bill- Welcome to Ferrari Life.


Note: Thread was two years old when Rumen last posted on it.


Hi Taz


I'm having the same problem after my major and found this thread. I HATE when people start a thread about a problem then never bother to post the fix. This is a case of that.


I went round my car and found a single bad gear. Replaced that. I also took all four actuators to Captain Z CNC and he found two to be bad. I had those rebuilt. When the car is turned on all four actuators spin and all four gears look good and spin about 1/4 turn.


The only wildcard is that I sent the rear shocks to Bilstein for rebuild. One had to have a shaft replaced and the gear on one seems to turn harder than the other three.


I may be stuck taking this thing to someone with an SD tool.
gobble is offline  
post #17 of 30 Old 05-01-2015, 04:50 AM
Owner
 
Join Date: Mar 2014
Location: NYC
Ferrari Life Posts: 94
Gobble,

Saw your resolution elsewhere. Would you post here as well?
badabing is offline  
post #18 of 30 Old 05-01-2015, 09:19 AM
Owner
Elite Member
 
tazandjan's Avatar
 
Join Date: Aug 2011
Location: Albuquerque, NM
Ferrari Life Posts: 11,858
G- The best folks for solving the hardware issues is Delta Vee. Ron Schemmerhorn does an excellent job on the Bilsteins and can even change the valving if you want him to.

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
tazandjan is offline  
post #19 of 30 Old 05-01-2015, 10:09 AM
 
Join Date: Jun 2011
Ferrari Life Posts: 14
Quote:
Originally Posted by badabing View Post
Gobble,

Saw your resolution elsewhere. Would you post here as well?

Problem solved!

I had two actuators rebuilt plus fixed a broken gear and that didn't shut the light off. So what next?

Each actuator goes through a distinct pattern when the key is turned on. The pattern is to find the stops. The pattern is longer when off the shock then when on the shock because it cuts short when it finds the stops when mounted. When not mounted it goes through the full sequence.

I listened to each with a stethoscope while mounted and one sounded really weak. What was happening was that it had to be pushed down rather hard on one of the rebuilt shocks to make the snap ring click and that was causing the actuator to bind up and not cycle. I swapped one of the rebuilt actuators onto that shock and could hear that one run through the cycle. When the "weaker" one was moved to the front it fit a little looser and cycled just fine.

So if you ever have a suspension light first check the gears on the shocks then check the functioning of the actuators. You should hear (can't see) each run through the starting sequence and find the stops. If it goes through a long sequence you may have a busted gear (because it never found the stops). If it goes through a short sequence it's ok. If it's hard to hear it may be binding up and not doing the self-test which will trigger the light.
gobble is offline  
post #20 of 30 Old 05-01-2015, 10:10 AM
 
Join Date: Jun 2011
Ferrari Life Posts: 14
Quote:
Originally Posted by tazandjan View Post
G- The best folks for solving the hardware issues is Delta Vee. Ron Schemmerhorn does an excellent job on the Bilsteins and can even change the valving if you want him to.


That used to be the case, but he added Ferrari tax to only the Ferrari shocks and instead of calling it Ferrari Tax he calls it Lifetime Warranty.


Bilstein rebuilt mine for less than 1/3 of what he's charging now.
gobble is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
Copyright 2012 ONE Media, Inc.
FerrariLife is independently run with no affiliation with Ferrari SpA
Ferrari for Sale | Maserati for Sale