Volvo evc won’t hold calibration

[jrudge]

2004 squadron 58. D12/715. Evc A

The port throttle will not engage in idle for either forward or reversed.

Each time a calibrate it it works for a few days and then either forward or reverse will not engage. I only use the upper helm. Not tried the others.

if I go past the idle point it will engage, and once the throttle goes back to the idle point it will be fine ( ie in gear ).

I assumed the potentiometer was dead. Changed it. No difference. Cleaned all the helm
Contacts with contact cleaner. No change.

I calibrated and held the lever very slightly towards neutral so the detent was a bit more than calibrated. This seemed to work for a few weeks then same again.

it is not the actuator being slow. You can leave it on the idle detent for as long as you wish and it won’t trigger.

no error codes.Any ideas ?

 

[Sticky Fingers]

Suggest you could try the lower helm. If that works OK it's isolated the issue to the flybridge throttle unit or maybe its cables. if it's the identical fault then it's something else, maybe the EVC. If the lower helm works fine you could swap the throttles over. If that works fine when reinstalled on the flybridge, job done. If not, then it's something else.

 

[Portofino]

As Scala head towards swopping with lower .But first ( I know it’s hot etc ) try a few days below , stress test the lower throttles before ripping everything apart .Once you are confident swop .
Interesting ( your lower helm time is not over ) if the upper now fitted below plays up .Or vice versa .
If so then it’s a wiring issue upstairs assuming both work fine below .If the issue follows the throttle it’s that .

 

[petem]

Did you check the actuator/micro switches?

 

[jrudge]

Did you check the actuator/micro switches?

There are not any micro switches on the throttle body. The actuator is not at fault as if you go past the detent it goes in immediately

 

[petem]

There are not any micro switches on the throttle body. The actuator is not at fault as if you go past the detent it goes in immediately

My understanding is that there are micro switches in the actuator. I'm sure I've read previous threads where these have become loose causing similar issues as you're seeing (could have bene in a KAD44/300 sterndrive actuator though).

Gear selection is going to involve a number of components...

Potentiometer - Ruled out
Loose connection - Ruled out
Electronic issue - possible - could be some kind of EEPROM issue in the ECU?
Actuator - See above
Linkage - Possible?
Gearbox - Possible?

If you want to DIY fix this then you're just going to have to work through each component until you find the culprit.

 

[jcwads]

Cable adjustment? Are you 100% sure the actuator isn't worn? Symptomatically if it is a little tired, the initial engagement could fail.

 

[petem]

Cable adjustment? Are you 100% sure the actuator isn't worn? Symptomatically if it is a little tired, the initial engagement could fail.

I'm not sure that shaft drive boats have cables from the actuator to the gearbox. But it would still be useful to rule out an a actuator or linkage issue.

Incidentally, for those people with VP sterndrive boats, it's now possible to replace the plastic gears without having to buy a complete new actuator at €1000 or so.

 

[petem]

J, did you resolve this?

 

[jrudge]

No, but it seemed to go away for a few weeks and then comes back from time to time. The lower helm works fine so it is an upper helm issue of some sort

 

[steadyeddy]

Bad connection