3200 TB & Pedal Pot
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Hi there.
Good to know I am not the only one with problems. Long story short
1) TB has been changed
2) The pedal pot came new from Candini in Modena on February and installed. Everything was fine for a few months.
A couple of weeks ago, while standing still, the engine run to 7000. I stopped the engine, detached the battery and then put it back on again. No change, so I brought the car back to the garage and the guy told me, after a scan check, that the problem is the pedal pot. The funny thing was that he installed the old pedal pot, gave a couple of bang on it and it worked fine. He did the same with the new pedal pot and everything was fine again : 1000 rpm.
I have seen different suggestions and ideas either here and in other pages but, as my case is a bit peculiar, I wonder if you could provide the right path to solution.
Many thanks in advance
Marco
Good to know I am not the only one with problems. Long story short
1) TB has been changed
2) The pedal pot came new from Candini in Modena on February and installed. Everything was fine for a few months.
A couple of weeks ago, while standing still, the engine run to 7000. I stopped the engine, detached the battery and then put it back on again. No change, so I brought the car back to the garage and the guy told me, after a scan check, that the problem is the pedal pot. The funny thing was that he installed the old pedal pot, gave a couple of bang on it and it worked fine. He did the same with the new pedal pot and everything was fine again : 1000 rpm.
I have seen different suggestions and ideas either here and in other pages but, as my case is a bit peculiar, I wonder if you could provide the right path to solution.
Many thanks in advance
Marco
davy83
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Hi Marco. Sounds like probably two problems. Are your white and yellow wires connected together in the loom in the car? Because revving to 7000 rpm suggests full throttle demand, and if you have two redundant outputs this should never happen, unless they both fail open circuit at exactly the same time? the high revs would probably be due to a ground connection being open circuit, and if banging it makes it better then it suggests there is a bad contact on the car wiring. I would start by replacing the connector on the car side with a new one you can get them from RS components or Mouser or i can sell you the parts if it helps, i have these somewhere, they are not expensive. The parts you need are
| mating TE connector | TE 175658 |
| Mating connector contacts | TE 173630 |
Hi Davy, many thanks for your answer
The guys at the workshop told me that there is a component insidie the ECU which is heating up irregularly and it could be the probable cause. Now ECU is under investigation; however I just passed your suggestion above to the workshop...let's see what pans out.
Sorry for my late feedback.
The guys at the workshop told me that there is a component insidie the ECU which is heating up irregularly and it could be the probable cause. Now ECU is under investigation; however I just passed your suggestion above to the workshop...let's see what pans out.
Sorry for my late feedback.
davy83
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The original pedal pot sensor from Bosch to my reckoning only lasts a few years, my car had 3 replacements in the first 10 years, and so I made my own contact-less replacement as to me this seemed crazy (the contact less replacement has been 7 years on my car now without problems). It depends how much you drive it of course, since it appears to be wear that causes the failure. And its not just the part breaking that causes the problem its the matching between the two outputs. Maserati set a very tight level of matching on the two outputs and so very slight uneven wear makes it throw an error (this is why joining the white and yellow wires works, as it makes the two outputs the same, although this also removes the system to prevent WOT on sensor failure). This was changed on the 4200 so this problem went away.
Danny
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Davy, I still haven't fitted the one I purchased from you as my current one was (until recently) still doing fine. However, I heard from someone who fitted your pp, that his loud pedal is now very light, making the drive a little bit nervous. Could it be that you used a different spring (or a different angle) for your contactless pp?
davy83
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Hi Danny
I tried as best i could to get the spring forces to be the same as the original so the feel would not change. Its not as easy as it looks
. There is some variation in the spring forces and so some of them are lighter than others, if your friend is unhappy with the feel i can try to stiffen it up a bit and replace the spring, its not that easy to do, but i am happy to try! I guess the one fitted to my own car is probably a bit lighter than the original but i have got used to it.
I tried as best i could to get the spring forces to be the same as the original so the feel would not change. Its not as easy as it looks
. There is some variation in the spring forces and so some of them are lighter than others, if your friend is unhappy with the feel i can try to stiffen it up a bit and replace the spring, its not that easy to do, but i am happy to try! I guess the one fitted to my own car is probably a bit lighter than the original but i have got used to it.
allandwf
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They must vary slightly, as mine is almost identical.Hi Danny
I tried as best i could to get the spring forces to be the same as the original so the feel would not change. Its not as easy as it looks
davy83
Member
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Sent
I may try to post it somewhere here for all to share, its not a secret.
Could you please send the installation procedure to me? Thanks
My email marco@deepmail.com[/QUOTE]
I may try to post it somewhere here for all to share, its not a secret.
Could you please send the installation procedure to me? Thanks
My email marco@deepmail.com[/QUOTE]
davy83
Member
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Yes also heard of some technique with smoke to see air leaks. If you suspect air leaking it it most likely a vacuum hose around the plenum or the most common is the cover under the plenum comes loose and this creates a leak, you need to remove the whole plenum to get into this however.
MRichards
Member
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Any service shop will do a smoke test to detect leaks in the system. It's quick & easy.
It's just a furnace which burns oil to produce a dense smoke which is pumped into the air intake. Any leaks will allow smoke to escape,instantly visible. In my country we burn Christians instead,produce lots of smoke.
It's just a furnace which burns oil to produce a dense smoke which is pumped into the air intake. Any leaks will allow smoke to escape,instantly visible. In my country we burn Christians instead,produce lots of smoke.