Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

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Direct Injection Injectors - How do they prevent blow back into the fuel system?

So I imagine a direct injection injector as a fuel injector squirting fuel directly into the combustion chamber. The amount of pressure in the combustion chamber would seem to be enough to push the fuel back into the injector. Obviously that is not…
DucatiKiller
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Does Tig welding a frame add more strength where fish plating isn't required?

Usually when someone builds a custom frame they are typically Mig welded and fish plated but if a frame is Tig welded does that generate better penetration when welding pieces together so you don't have to fish plate? My understanding is limited in…
Hᴇʀʙɪᴇ
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Wheel rim chrome repair

I recently bought a used vehicle which has some aftermarket rims on it. For whatever reason the previous owner failed to take good care of them and there are areas of them (some are 2 or 3 inches) that look like the chrome plating or finish has been…
Andrew
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Can't get into trunk of 2000 mercury marquis

Anyone have any ideas to get into a locked, jammed trunk of a 2000 mercury marquis? They key, the remote, and the button on the door all do not work, although a clicking sound is produced. You can't access through back seat. I think its because…
user16650
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How is AFR calculated from ODBII readings

In another post (A most intriguing cold-start misfire mystery) I found this quote: Mass air flow = 3.66 g/s Fuel flow = 1.27 l/h, Fuel rail pressure = 380 kPa This indicates to me that AFR is around 14.88, close to stoich. How is AFR calculated…
cdunn
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Horsepower at wheels calculation

I have used Torque Pro App for sometime in my Hyundai i10 Era (2011 model) and it gives me Horsepower at wheels. But the values seems to be much less. To find out the problem, I logged the car OBD speed using Torque Pro app, calculated the Hp at…
Soumya Sen
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Can I balance my wheels at home?

My 2003 Opel Agila steering wheel shakes and the car vibrates from 65-80mph, and I think it's because my wheels aren't balanced as I have had new tyres, tracking and wheel balancing about two months ago. I went on the motorway today, and the car…
George
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Coolant expansion tank issue

My coolant tank is filled up to the correct level before driving off but I've taken a half an hour drive and it is very low and warning light comes on. Once stopped it cools down and the level rises. I've had it checked and theres no leak. Any ideas…
Anthony
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Pontiac G5 transmission sometimes grinds when shifting into first while stopped, occasionally stalls car

I have a 2007 Pontiac G5 with a 5-speed manual (Getrag F23 if you're curious) and about 145k miles. This problem has been ongoing for a couple years now but is progressively getting worse. Sometimes when I shift into first while stopped, like at a…
thesammon
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Is there any advantage to keeping the battery "topped up"?

I got an engine/cabin heater installed into my car right before winter, which was great for driving comfort this winter. One of its "side-effect" features is that it charges and keeps your battery at 14.1 volts while it's connected. Does this have…
Alex
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Is tire life by mileage a failure point or wear point?

When getting new tires and a seller refers to a tire with a 60,000 mileage life does that mean that the actual tire is expected to reach a full wear pattern by a certain thickness or is that from a tested failure rate around that mileage? Though,…
Hᴇʀʙɪᴇ
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What precautions are needed when charging a car battery in an apartment?

Suppose a car owner lives in an apartment building and parks his car nearby. He wants to detach the battery, bring it home and charge it with a mains-powered charger indoors. How to properly handle the battery so that no damage is done to people and…
sharptooth
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How do I get to see my Mode 06 in OBDii

Mode 06 in OBD2 is good to get an insight of what faults the car might encounter in the future. But I am unable to find out what command should I send to get Mode 06 data. It has TID$01 CID$01, so how do I send the command? 060101 or 0601? Please…
Soumya Sen
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Is the unreliability of the 400 Small Block Chev an Urban Myth?

The Gen 1 Small Block Chev gradually grew to 400cid. To achieve this massive volume the bores were siamesed and the conrods were shortened.The engine when produced in passenger car form had the same HP rating as the popular 350 but it made more…
Autistic
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Why is one of my interior components electrified?

I have a 2007 Nissan 350Z and there is a trim bar inside of my car that feels electrified. I even touched my tongue to it (please, I know) and I can feel electricity. It's similar to if you have ever taken a 9volt battery and touched it to your…
Ppoggio
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