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Not responding to throttle input and has heavily oscillating idle

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Rene_Z4MC
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Not responding to throttle input and has heavily oscillating idle

Post by Rene_Z4MC » Sat Dec 23, 2017 9:53 pm

Another quick update:
Did an ECU read-out with OBD Auto Doctor (trial version) and found P1417 which is indeed throttle control related.

Possible causes
- Faulty Throttle control
- Throttle control harness is open or shorted
- Throttle control circuit poor electrical conenction

Like said before the symtoms are currently no longer there and I've checked TPS connection etc but didn't find any issues.
Not really a satisfying outcome but will use the car for now (engine light is off again) and see what happens.
Will keep you updated :)
2006 Z4M Coupe Interlagos Blue, CS Wheels with Michelin PSS, Eibach, CDV delete, RTAB limiters, Vibra Technics Engine Mounts, OEM Strutbrace, ZHP gear knob

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Rene_Z4MC
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Not responding to throttle input and has heavily oscillating idle

Post by Rene_Z4MC » Wed Feb 07, 2018 6:56 pm

Just a short update for future reference;
End of December I've cleaned the throttle bodies and IACV, been using the car on a daily basis since and did not have any issues anymore. I think that dirty/stuck throttle body/linkage must have been the root cause.
Thanks for all your support
2006 Z4M Coupe Interlagos Blue, CS Wheels with Michelin PSS, Eibach, CDV delete, RTAB limiters, Vibra Technics Engine Mounts, OEM Strutbrace, ZHP gear knob

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Yorkie Z
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Not responding to throttle input and has heavily oscillating idle

Post by Yorkie Z » Wed Feb 07, 2018 7:30 pm

Glad it's all running fine again. Long may it continue :thumbsup:
A Dirty M///

Mangozac
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Not responding to throttle input and has heavily oscillating idle

Post by Mangozac » Wed Feb 07, 2018 9:30 pm

Did to lubricate the throttle body linkages too or just clean them?
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Rene_Z4MC
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Not responding to throttle input and has heavily oscillating idle

Post by Rene_Z4MC » Wed Feb 07, 2018 9:58 pm

Used some WD40 to clean everything, after that a little PTFE spray here and there to lubricate
2006 Z4M Coupe Interlagos Blue, CS Wheels with Michelin PSS, Eibach, CDV delete, RTAB limiters, Vibra Technics Engine Mounts, OEM Strutbrace, ZHP gear knob

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vester86
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Not responding to throttle input and has heavily oscillating idle

Post by vester86 » Sat Feb 10, 2018 12:34 am

Sound very much like the problem i had a winter ago

https://z4-forum.com/forum/viewtopic.ph ... e#p1418085

although not the same engine, might worth looking at??

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