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Discussion summary
YOUR RESEARCHI hate those mieces to pieces.
Leading reported evidence
Install battery powered high frequency noise generators
Performed · outcome unconfirmed
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Unsuccessful attempts
1
Discussions
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Performed · outcome unconfirmed
Have since installed battery powered high frequency noise generators under the hood and in the trunk.
Leading evidence: 'Install battery powered high frequency noise generators' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install battery powered high frequency noise generators' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Little buggers got into the electronics behind the rear deck and chewed through wires to the tune of $600 dealer repair (not under warranty).
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Suggestion
Default mode is always to run the engine on the rich side to save it from possible lean out and damage.
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16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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I was quoted $900 for a job on the car from Porsche in Lancaster PA. Found an indie who completed the job for me for $329. The job was for installing 2 knock sensors. He discovered that a mouse had bitten through the wires of one of the sensors. Lack of a knock sensor not working brings on the CEL and the computer leans the gas/air as a precautionary measure. The difference in acceleration is amazing. I will have to put mouse traps down in the garage from now on.
Hurdi: You probably already know this trick, but when I store my car in the garage for winter I put smalll net bags of mothba--s in strategic places. In frunk and engine compartment plus mouse traps around beneath car. If this happened during the driving season...get a good barn cat!
You are thinking of a lean mixture 'pinking'. The knock sensor picks up on a metal knocking and leans the mixture so top red line revs are never reached. The OBC leans the mixture if any of the knock sensors are not working correctly. Now my top revs are awesome. The acceleration is kind of scary
I don't mind giving my age away Ben. In fact I am kind of proud to be driving a 911 at a ripe old age of 75. How about this. I was driving around Pocono Race track yesterday.
Yeah, I don't understand the point either. Knock=detonation; the way you fix detonation is to increase the richness of the a/f mix or retard timing. Leaning a car when the knock sensors are not working seems counterintuitive.
Had similar problem with our 2015 Audi A8. Little buggers got into the electronics behind the rear deck and chewed through wires to the tune of $600 dealer repair (not under warranty). Have since installed battery powered high frequency noise generators under the hood and in the trunk. Also put one in the engine compartment of the 996 as well as a plug-in model along the garage floor. So far no more damage, but fall is here and it's move-in time for critters.....keeping an eye out!
I agree! Default mode is always to run the engine on the rich side to save it from possible lean out and damage. Lean makes the engine make more power but rich kills power
When a knock sensor is not working the OBC leans the mixture. I had a disconnected one in mine. (the mice had bitten through the wires). A good knock sensor does not listen for detonation but for a metal against metal sound. There is a big difference between a PINKING sound (detonation) and a metal against metal sound. Well at least that,s what I think happens.
This is gibberish unless you can point to a technical document that explains (a) the difference between detonation and pinking (hint: they are synonyms), and (b) why ANY engine control unit would lean a mixture if there is detonation, pinging/pinking, or failure of the sensors that detect detonation?
When my smoke alarm quits working, the alarm company doesn't drive over and douse my house with gasoline; if the knock sensors aren't working, why would the ECU do anything that would almost certainly
increase
the chances of detonation/knocking?
