maserati 3200 throttle potentiometers ( pedal sensors )

[LGAssetto]

Seems my Throttle body has gone to ?

I am not a betting man..... But I would put money on it been the throttlebody. The offer still stands!! Let me know

Hi Bill et al.

My 3200 Assetto is low mileage and only used on occasional weekends so hard to believe its worn tracks as I've been reading, however after the number of mechanical issues to miles is the greatest of any car I've ever owned I'm assuming the worst and need both TB and Pedal Pot.
The symptom has been engine light intermittently on and ocassional weird revs. This culminated on the weekend with an "episode" it spurted revs for a minute or so then locked into something beyond limp mode, walking pace only, its an Auto.. I managed to get it home luckily all happend within a few hundred metres.
Problem now is getting it to a tester for diagnosis, however following instructions on the forums I've tried the yellow/white wire trick, and unplugging battery to reset for an extended period, with no effect the accelarator has no response whatsoever.

So I'm reasonably resigned to it being the TB, and after reading about your contactless version Bill, are these for sale,if so from whom and where?

Also are the contactless PP's also available for sale, or can mine be refurbed/rejigged by anyone?

Thanks in advance

Lyndon

 

[Parisien]

Welcome to the forum Lyndon, thanks for joining, hoping we can be help!


P

 

[boomerang]

Hi Lyndon, good to have another Asetto owner here, wonderfull and rare version of the 3200GT!

Everything points at the TB indeed, especially as you did the "white-yellow wire thing" allready without results.
Still, hooking up the car on the SD2 tester would make you sure about faillurecauses.

Regarding the contactless PedalPot(PP): As you may have read, we had quite a discussion here about legal matters and risks, trading a safety related issue as a PP.
Though the contactless prototype runs fine in an automatic car for half a year now, i am not brave enough to start trading the thing to be honest.
Quite a shame in fact, because the complete throttle circuit would be wearfree after mounting both the contactless components.

 

[bill]

Hi Lyndon and welcome

It does sound like you have tipical symptoms of a failed throttlebody. The contactless upgrade is completely safe and fully warranted. It still has the inbuilt redundancy of the original design only with out the wear! I am slightly worried about the only idling after crossing the wires symptom though. Does the CEL come on straight away after that? Do the revs to 2800 only symptom come back after the wires are put back to normal? Had a customer who did this and damages the throttlebody beyond repair....

Let me know if you need help

Cheers
Bill

 

[boomerang]

I am slightly worried about the only idling after crossing the wires symptom though. Does the CEL come on straight away after that? Do the revs to 2800 only symptom come back after the wires are put back to normal? Had a customer who did this and damages the throttlebody beyond repair....

Let me know if you need help

Cheers
Bill

Throttlebody faillure because of the crossed white and yellow wires?!
Please Bill, that is impossible.

 

[NickP]

I had no throttle response before doing the cross wired trick and before the wireless throttle pot was fitted. Best to get it on an SD2, I'd get the wireless throttle pot done regardless, then if you still have problems its the pedal pot...

 

[AerosGS]

Does someone have an old pp to send me -I might be able to source a long life replacement if I can examine it...

Cheers

 

[boomerang]

http://www.sportsmaserati.co.uk/sho...tle-PEDAL-potentiometer-CONTACTLESS-PROTOTYPE!

This one WAS the long life replacement we looked for, but as i said before, i am afraid trading the thing to be honest, while this very one from the picture still runs fine.

 

[LGAssetto]

Thanks Nick,

I'm going to try changing both as previously when tested the potentiomenter showed up as an issue, i cant move it from my driveway at the moment so will be best doing both i think.

I had no throttle response before doing the cross wired trick and before the wireless throttle pot was fitted. Best to get it on an SD2, I'd get the wireless throttle pot done regardless, then if you still have problems its the pedal pot...

 

[LGAssetto]

Hi Lyndon, good to have another Asetto owner here, wonderfull and rare version of the 3200GT!

Everything points at the TB indeed, especially as you did the "white-yellow wire thing" allready without results.
Still, hooking up the car on the SD2 tester would make you sure about faillurecauses.

Regarding the contactless PedalPot(PP): As you may have read, we had quite a discussion here about legal matters and risks, trading a safety related issue as a PP.
Though the contactless prototype runs fine in an automatic car for half a year now, i am not brave enough to start trading the thing to be honest.
Quite a shame in fact, because the complete throttle circuit would be wearfree after mounting both the contactless components.

Thanks Boomerang, great looking car however I've never owned a more unreliable vehicle, since 2008 I'm close to 10k spent on it, this is the latest in a longline, and finally it seems something I can do the labour on...

I'm going to try and dig up all the commentary on the legal side of things, and mines automatic whether that makes any difference i'm not sure
thanks again

 

[LGAssetto]

Hi Lyndon, good to have another Asetto owner here, wonderfull and rare version of the 3200GT!

Everything points at the TB indeed, especially as you did the "white-yellow wire thing" allready without results.
Still, hooking up the car on the SD2 tester would make you sure about faillurecauses.

Regarding the contactless PedalPot(PP): As you may have read, we had quite a discussion here about legal matters and risks, trading a safety related issue as a PP.
Though the contactless prototype runs fine in an automatic car for half a year now, i am not brave enough to start trading the thing to be honest.
Quite a shame in fact, because the complete throttle circuit would be wearfree after mounting both the contactless components.

Thanks Boomerang, great looking car however I've never owned a more unreliable vehicle, since 2008 I'm close to 10k spent on it, this is the latest in a longline, and finally it seems something I can do the labour on...

I'm going to try and dig up all the commentary on the legal side of things, and mines automatic whether that makes any difference i'm not sure
thanks again

 

[LGAssetto]

Hi Lyndon and welcome

It does sound like you have tipical symptoms of a failed throttlebody. The contactless upgrade is completely safe and fully warranted. It still has the inbuilt redundancy of the original design only with out the wear! I am slightly worried about the only idling after crossing the wires symptom though. Does the CEL come on straight away after that? Do the revs to 2800 only symptom come back after the wires are put back to normal? Had a customer who did this and damages the throttlebody beyond repair....

Let me know if you need help

Cheers
Bill

Thanks Bill,

the idle was permanent on before trying the wire cross, the wire cross hasnst changed anything, and I've left it that way, and was intending leaving it that way after having read his forum, is that best or shouldI be changing it back once the PP and TB are changed?

Thanks again Bill
Lyndon

 

[deano]

Just to add another little twist to this thread the current audi v8 and v10 are running the same/similar throttle pedal potentiometer to the one used on the 3200,only the wiring plug is different,which is no hard job to swap over,and theses have prooved trouble free to us,

 

[Danny]

This is interesting. Could you please tell us a little bit more about which Audi throttle pots exactly, how you established that they are more or less similar to the 3200 and what your experiences with the Audi pots are?

 

[boomerang]

The pedalpot of the 4200/Gransport looks the same too, as well as pedalpots in som big Scania trucks, also using the Bosch lookalike....
But you will have to do some measurements on the unit to be sure it is electricall identical.
The 4200/GS variant for example has totally different outputs, compared with the 3200 one.

 

[davy83]

listen this is all getting a little excitable, any of you guys got machining capabilities? I have a contactless pedal sensor and the basic ingredients for a contactless replacement, but need some aluminium parts made to make it into the solid reliable part we are all looking for. Any one willing to help out by machining some small parts should mail me back and we can get this pedal sensor into circulation pronto!

 

[Chris Eggleton]

Good afternoon Gentlemen,
I am currently going through the very same issues and problems with my 2000 year 3200GT. The car has been in limp mode for quite some time now, before I hooked up with a good old fashioned mechanic here in the Hunter Valley NSW, Australia. I also enlisted Dave Shanks expertise in this area, who makes contactless pedal potentiometers for the 3200 (unfortunately out of stock att, but I have an order in when he get's up and running).
A great fault finding procedure is the accelerator pedal, and throttle body reset which, in my case temporarily cancels limp mode, and is indicative that the throttle pedal isn't 'talking' to the TB. Dave also showed me a procedure on start up which determines if the TB is defective involving monitoring the TB start up procedure, the TB start up routine involves it moving the butterfly valve around doing a start up test and then should sit in a fixed position and should whistle. If the whistle stops it's failing its own start up routine. Also the throttle butterfly should move smoothly with minimal play or you may have a build up within the TB internals of carbon dust preventing smooth operation.
Check out this you tube videos for fault finding techniques.