Piston Slap: A GPS-targeting Sleeper Agent?

TTAC Commentator Waftabletorque writes:

Dear Sajeev,

I’m having an issue diagnosing a navigation system problem on my 2002 LS430. I’ve gone a few years with the GPS link not working, which means it no longer receives a satellite signal and defaults to dead-reckoning mode (the GPS symbol disappears on the touchscreen). It’s a nuisance issue but it’s low on my priorities.

It also happens that I’ve been using a dashcam for the last four years. I never linked the two together until I had a couple of dashcams go bad in 2016, and spent the whole summer without one. Well, my GPS started working again, and I chalked it up to a warm summer fixing some sort of electrical wiring fault in the antenna.

Once I got my fourth dashcam in September, I noticed my GPS stopped working again. It was getting cold in the mornings and I thought my good luck spell had ended. Then, it occurred to me that maybe the GPS gets disabled when the 12V was in use. I’ve since found that it’s true for all three of my 12-volt ports (cigarette lighter, arm rest, rear seat cigarette lighter).

None of my other electrical loads (seat heaters, defrosters, seat massagers, headlights, fridge, etc) seem to trigger this issue, and I replaced the car battery in 2013.

So, what’s my next step? Is this a grounding issue? Voltage issue? A conspiracy of aftermarket electronics deliberately disabling automotive functionality?

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What's Wrong With This Picture: Surveillance In The Age Of Taurus Edition

Like the song says, I always feel like… somebody’s watching me. But rarely are they as obvious as this old Taurus I spotted north of Columbus, Ohio over the weekend.

What’s going on here, B&B?

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ATS Red Light Camera Claims Driver Pulled 4g Turn

The city of St Petersburg, Florida uses camera systems sold by American Traffic Solutions (ATS, formerly American Traffic Systems) to issue tickets to drivers allegedly running red lights. According to The Newspaper, when the activists at St Petersburg Red Light Cameras reviewed logs of the 21,602 photo tickets issued in the city from October 29, 2011 to April 30, 2012 they discovered that the ATS cameras were reporting that they “measured” Bugatti Veyron level speeds from cars not realistically capable of that kind of velocity.

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Washington: Council Drops Cameras In Response To Voter Revolt

The city council in Mukilteo, Washington voted on Monday to reverse itself on the issue of photo enforcement. After over 1909 voters signed a petition to call for an election to ban red light cameras and speed cameras, council members began to have second thoughts about their contract with American Traffic Solutions (ATS) to operate automated ticketing machines. ATS also operates in the neighboring town of Lynnwood.

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  • DO I have owned a 2012 LR4 since day one and it has been the best vehicle I have ever had the pleasure of having in the garage. I know how easy it is to hate on Land Rover but this LR4 is comfortable, has a ton of storage room and is so versatile. With 110k miles, mine is now relegated to ‘other’ car use but is still the go to for off road adventures and snow runs. Nice to see one featured here - I think they are so underrated.
  • Tane94 I'd be curious to know whether 87 octane is no longer the most popular grade of gasoline by sales volume. My Costco often runs out of Premium grade and I suspect 93 octane might now be the most popular grade of gas. Paying 40-50 cents more per gallon 87 vs 93 octane because of turbo engines is the real story
  • Redapple2 125 large? You re getting into 911 territory.
  • Redapple2 Industry worst quality prevents any serious consideration. I ll take an Evil gm Vampire Denali first.
  • MaintenanceCosts Thing mentioned in the article: 77 pounds lighter than the standard version!Thing not mentioned in the article: The "lighter" curb weight is 3902 pounds. That is a few pounds heavier than my 2011 335i *convertible*.