Hi, sorry haven't been on here since buying my 3200 but work has kept me away from home and my new toy !!! Took it to Robert at Maserati shed for a annual service and cam belt, what a nice guy he is a very reasonable makes owning one these cars a pratical choice. Before I took it him I was having a few issues with the car revving by it's self, so after reading on here about the pedal pot problem I linked the yellow and white wires together. After this mod the car has been a dream but can I leave it like this or this more of a diagnostic tool? Also don't know if any of you are ever near Lymington/Lyndhurst but if you are and fancy a pint let me know, would be great to pick some of your brains. Cheers Matt
pedal pot
- Thread starter Amis
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conaero
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Hi Matt, as far as I am aware, you can leave it like this, and no, its not just for diagnostics, but you obviously do have an issue with either your pedal pot or throttle body. If I was you I would get it upgraded to the contactless system, PM Boomerang on her for details and prices.
Parisien
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YHTM
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Thanks for that - that's worth me driving down for the day. Anyone had their exhausts fitted?
bill
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Matt
I can't emphisize enough that you should definetly NOT do this long term. The redundancy in this throttlepot is for a good safety reason and by bridging the two circuits this safety feature is not there.
Hope his helps
Bill
BennyD
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Bill, what is the safety feature and why is it there?
bill
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In simple terms, like the throttlebody, it has two potentiometers which the ECU reads and compares. If there is difference between the two readings, its recognised as problematic and the engine is put in limp home mode. By connecting the yellow and white wire, it ensures the ECU reads the same signal from both inputs and does not go into limp mode. However, it also has no way of double-checking if the signal is correct. The result subsequently could be anything from the inconvenience of no throttle to the potential disaster of out of control engine!! There are other things going on but fundamentally that's why these wires should never be joint as a fix to a throttle pot error. It will get rid of the error but it will also lights the fuse of a time bomb!
boomerang
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Again i have to refer to earlier discussions.
NOBODY has been able to tell me the disadvantage of the coupled wires in practice.
We have gone through this many times on both forums and even an Aviation technician stated the redundancy system as Maserati developped it, is questionable in its functionallity.
I have discussed this matter on various occasions with chief mechanics of main Maserati dealers and they too where not able to tell about disadvantages of the linked wires.
In the meantime i can confirm the prototype of the contactless pedalpot has been mounted in a 3200 GT today and after solving some minor issues, the car runs like a dream now with the new sensor!
Only thing is, that the pedalpot of the 3200GT differs from the one on the 4200/GS.
I will dive into the later types as soon as possible, because my Gransport is responding less consistent on the throttel too lately, so a contactless conversion is wanted.
NOBODY has been able to tell me the disadvantage of the coupled wires in practice.
We have gone through this many times on both forums and even an Aviation technician stated the redundancy system as Maserati developped it, is questionable in its functionallity.
I have discussed this matter on various occasions with chief mechanics of main Maserati dealers and they too where not able to tell about disadvantages of the linked wires.
In the meantime i can confirm the prototype of the contactless pedalpot has been mounted in a 3200 GT today and after solving some minor issues, the car runs like a dream now with the new sensor!
Only thing is, that the pedalpot of the 3200GT differs from the one on the 4200/GS.
I will dive into the later types as soon as possible, because my Gransport is responding less consistent on the throttel too lately, so a contactless conversion is wanted.
bill
Junior Member
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Luuk
We have been here before, on both forums as you put it, so I guess we ll just have to differ on this one. I am not sure if you are familiar with FMEA (failure mode and effect analysis) but I am sure if you carried one out on the electronic throttle system it would run into several pages and you will end up with the redundancy designed both in the throttle body and the throttle pot. Just out of intrest is your contactless throttle pot a double circuit design or single?
We have been here before, on both forums as you put it, so I guess we ll just have to differ on this one. I am not sure if you are familiar with FMEA (failure mode and effect analysis) but I am sure if you carried one out on the electronic throttle system it would run into several pages and you will end up with the redundancy designed both in the throttle body and the throttle pot. Just out of intrest is your contactless throttle pot a double circuit design or single?
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boomerang
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Yes it is a dual output version, thus supporting the beloved redundancy system.
It is the Magneti Marelli safety regime in the ECU that makes the effectiveness of the choosen redundancysystem discutable in my opinion.
The redundancy system in the Throttlebody is not a point of discussion though.
At the end of the throttle line, this redundancy system is absolutely nescesairy for safety indeed.
It is the Magneti Marelli safety regime in the ECU that makes the effectiveness of the choosen redundancysystem discutable in my opinion.
The redundancy system in the Throttlebody is not a point of discussion though.
At the end of the throttle line, this redundancy system is absolutely nescesairy for safety indeed.
bill
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I know what ECU stands for it's the comment above I was referring to!
Luuk it seems that we are not going to agree about the aproach to the throttlebody/throttle pot issue. I am happy for you that you have found your solution and I hope it works well for you. The data from my throttlebody upgrades and logic that I follow does not have a need for a throttlepot conversion. I might well be wrong longer term but so far i don't share your thoughts
Cheers