HES Question - BMW Luxury Touring Community
 
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post #1 of 2 Old Jul 25th, 2014, 7:14 pm Thread Starter
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HES Question

Has anyone had a HES drift from its original position without being touched? Or should I say has anyone had sensitivity problems with either HES sensor pickup? Detonation/Ping had started gradually to the point of being unbearable. I have gone to the full CCW position with good to fair results. Would this be a problem with the HES getting weak and not being able to do the job as in new condition? I know that detonation/ping has been a problem with the older big twins as mine (1996 R1100R). I have done the water torture, new plugs, borescope,T.B. sync. valve timing/lash. Did the timing using Timing light, and also checked using the fuel pump method and found pump cycle to be off, so a full CCW rotation was needed to get the pump to cycle. Is there something wrong with the HES? This Beemer is my first oilhead.

Wisdom appreciated.
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post #2 of 2 Old Jul 25th, 2014, 8:03 pm
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Re: HES Question

Check your fuel pump pressure.


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