Automotive

In addition to ignition, power and monitoring gauges and lights, today's motor vehicles feature computerized engines, transmissions and braking systems, electronic mapping systems, Bluetooth and Internet connectivity, sensors that detect other vehicles, motorized seats, and digital audio and video systems; several manufacturers are producing electric and hybrid automobiles and self-driving cars.

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A friend has asked me help him repair his dodge hemi.  The engine is overheating when the ac is turned on.  He says he spoken to an expert mechanic who says he needs a new water pump.  I have  explained that there is nothing to wear out in a water pump except the bearings or the seal. When water starts getting through the seal it comes out the weep hole  in the bottom of the pump. Because the impeller is made out of metal, it never wears out so the pump always works even when it is leaking.  The  Engine has a new thermostat. But he's also told me that he regularly has to stop and put water in the radiator.

Therefore one of two things are happening. Either the leak is so bad that the radiator  isn't holding enough water to satisfy the engine needs and AC needs at the same time.  I believe the AC coil is integrated into the radiator core itself.  Low water would quickly cause the engine to overheat.  Or, the radiator is clogged up  and needs to be flushed out.  

He has been putting distilled water in the radiator to save money. I suggested that he stop that and start putting 100% antifreeze in the radiator. I believe antifreeze has a much higher boiling point. I might be wrong about that.   In any case, as long as the water pump is turning and the belt isn't slipping, the water pump, in my opinion, is pumping water like it should and the problem is elsewhere.  Am I correct? Am I missing anything?
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My 1998 Chevrolet C1500 shows an airbag light on dash.  Does this mean my air bag is defective?  Should I get this checked out ASAP?
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Hi,
How lidar technology can disrupt automotive industry, The evolving self driving industry has witnessed major advancement in lidar technology. It would be great if someone could explain about hybrid lidar concepts.
Thanks in advance.
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Auto mechanic uses on prem application called RO Writer.  Intermittently, the number pad on their Logitech wireless keyboards stops sending data to the application.   User switches to a different application and it works fine. So the problem is isolated to RO Writer. They haven't communicated the problem to vendor because there's a low expectation of any positive response.

Number input at top of keyboard works fine. Numeric pad stops functioning until you restart the app.

Thoughts?
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I have an Ariens Lawn tractor and my daughter put in dirty old gas into the tank and ran it for a bit.    Then it stopped and  I can't get it started anymore. I dumped the gas out and put in new gas and it won't start.  Tries to start but does not.    What do I need to try and get it going?  Another terrible thought is that it wasn't gasoline.   It did not have much of a smell, maybe because it was so old.  When I looked in the tank before I dumped it the gas looked pretty brown, but that could have been because this was old and dirty.
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I installed a new aftermarket stereo in my 01 Tahoe. Everything worked but when I turned the truck ignition to on from accessories... I lost all sound. I pulled it out, opened my door to reset everything and plugged the stereo back in. Started the truck and the same thing happened. I can only get the sound back on by turning off the truck, open door for reset, unplugging stereo, plugging stereo back in and turning truck key to accessories. I tried the deck in my buddy’s 01 Tahoe nod it worked fine. I tried putting his deck in my truck and the same thing happened. I put my stock one back in and it works fine. I’m completely stumped by this?! Help?!?
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Ford ka 2001 1.3 not starting fuel pump changed and serviced at garage took car back to garage did not do a non start once in two weeks got it home parked on slope driveway would not start
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I changed my oil and transmission and filter and the hino268 and the truck has a SBS light coming up and the truck is too slow and can't go past 50 mph
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My diamante 98 just had replaced the battery and the alternator and i had it parked for like 2 to 3 months and now when i jump start it after i drive it for a bit and check a few hours later all the power is gone again i already checked the fuse the main relays and everything is fin even when i get it turn on the car works fine and if i turn it off and then turn it on again it does turn on but if i leave it for a while dead again and for some reason when i try to jump start it again it takes a long time for the power to go through the car why would that be
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Automotive

In addition to ignition, power and monitoring gauges and lights, today's motor vehicles feature computerized engines, transmissions and braking systems, electronic mapping systems, Bluetooth and Internet connectivity, sensors that detect other vehicles, motorized seats, and digital audio and video systems; several manufacturers are producing electric and hybrid automobiles and self-driving cars.

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