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05-27-2016, 09:12 AM | #111 | |
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I suppose all the people just replacing the TAs should see less mileage before a fault on the second set of TAs. |
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05-27-2016, 09:40 AM | #113 |
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here is the FET P/N from a couple sites
http://www.digikey.com/product-detai...5CT-ND/4552481 http://www.mouser.com/ProductDetail/...L15cG6TxodtuX5 I would recommend finding a friend with a board preheater. It's kind of like a stove for a PCB. It really helps to melt the solder under the FETs. Last edited by drummer20; 05-27-2016 at 09:49 AM.. |
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05-27-2016, 10:45 AM | #115 | |
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I am not comvinced lubing your 4 year old linkage at 25k miles proves lubed linkages will prevent actuator failure. If yours were 8 years old and had 100k+ miles on them, then I would agree they seem to be lasting longer than average and that lubing them could be the reason. But yours seem too young and low mileage to fail anyway, whether lubed or not and the future seems like speculation. |
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05-27-2016, 11:00 AM | #116 |
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judging from this thread http://www.m3post.com/forums/showthread.php?t=1234084
there is a guy with 70k miles and original TAs who regularly cleans his throttle actuator linkages with soapy spray bottle and a light pressure washer and then compressed air. Apparently, the bearings are sealed so it's more about cleaning them then actually being able to lube them. 3M 08897 is the preferred "lubricant" apparently but it's really just operating as a spray cleaner |
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05-27-2016, 11:48 AM | #117 | |
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Mine was not as dusty as many pictures I have seen, but as I said, it squeaked already and manipulating it was much easier after lubrication. Your car may be O.K. at even more miles, but I won't take any chances. BTW: These are the areas to lube - I used WD40, because it is not so much about the lubing, but getting the dust out of the gaps: Matter-of-fact, theorizing about increased actuation because of rough idle turns out to point into the wrong direction: Actually, I believe that the stiffness of the actuation causes cog wear in the area that is passed most often (low RPM) and thus it is most stiff just there. So, in order to keep idle RPMs steady, the control unit has to use more force in regulation, which causes an overshoot once it is applied. It is not rough idle causing the wear, it's just the other way round.
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Last edited by meyergru; 12-22-2017 at 10:04 AM.. |
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05-27-2016, 11:57 AM | #118 |
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I used white Lightning clean streak then hit all the linkages with the aforementioned 3m dry silicone lube and the squeaks definitely stopped. This combo also leaves no residue to attract additional dust/dirt which is a major plus
Last edited by Shredicus; 05-27-2016 at 12:04 PM.. |
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06-18-2016, 09:46 AM | #119 |
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Forgive me if this has been beaten to death. I just received a throttle monitor bank 1 fault 2b25. Anyone have luck changing out the gears soon after receiving faults and staying in the clear thereafter?
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06-21-2016, 11:44 AM | #120 | |
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I did the gears preventatively and I am going to try a fix the circuit board when mine goes but just because it's kinda interesting to me. But I am a board designer and I have all the soldering tools and even professional solder tech to help me out. I identified most of the IC chips on the board already and even found the datasheet for the actuator which shows the pinout for the connector. |
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06-27-2016, 04:16 AM | #121 |
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1 month ago I had problem with 1st bank TA. When I opened it, there was black FET, I changed it but it was only few days till error comes again. So I did change the gears in booth TA with the plastic gears set from ebay, changed 2 FETs, also lube the TB shafts and all the stuff there. Now It's working fine for almost one month, no errors...
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06-27-2016, 01:48 PM | #122 | |
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06-30-2016, 10:13 PM | #123 |
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This may save some time in trouble shooting / testing electronic issues in the board. Putting everything back together to start the car is not necessary! Simply connect the TA to the harness, dont even need to bolt it down. Turn on ignition by pressing start button twice without foot on clutch or brake pedal. If the board is ok the actuator arm will twitch back and forth once. If it doesn't, the board is toast. I plan to do this for each transistor replacement.
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07-27-2016, 11:48 AM | #125 | |
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07-28-2016, 04:13 PM | #126 |
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Here's a FYI for anyone looking to trying to repair their throttle actuator's circuit board. In the throttle actuator DIY thread, I posted a pretty extensive list of which ICs can be swapped on the board with links to parts on digikey or mouser.
http://www.m3post.com/forums/showpos...&postcount=582 |
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09-11-2016, 11:34 PM | #127 |
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So I have done the gears and the mofset's on both actuators and the initially faulty actuator still throwing codes...When starting the car it's hit or miss. 1/6 times of starting the car it seems to be without fault but the other times it's comes on from start of after 5 mins of idling/driving. From a visual inspection of the rest of the board I have notice a difference between the bank 1 and bank 2. I have noticed little blemish in what I think might be some kind of resistor. I don't know if anyone could possible source this of if its even possible to swap but just courious before I but a new actuator. Thanks in advance for any incite.
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09-12-2016, 02:18 AM | #128 | |
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Drives: '11 M3 ZCP LeMans Blue
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09-12-2016, 10:36 PM | #129 |
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Have you swapped the circuit card to the other bank to see if it follows? that should tell you if the board or the motor is at fault. either way your running out of options and may be faced with buying a new one soon.
i swapped gears and it held up for a month. just swapped mosfets and its back running again. next time i'll likely have to cave and throw down the $900 unless I trade the car in before then... |
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12-22-2017, 08:04 AM | #131 |
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Reviving this thread to see if anyone has been able to find the FETs lately. All of the links in this thread as well as what I can find on Google are showing the part is discontinued and no longer being sold.
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