9
votes
3answers
17k views

How is “outside temperature” measured in a car?

Most cars have a display for outside temperature, and I have been wondering how it was measured... In other words, where exactly is the sensor and how reliable is it?
9
votes
3answers
12k views

How do I safely siphon gas from a tank?

Our 2003 Windstar was recently totaled in an accident (everybody's ok). This happened the day after we filled the tank. Before we hand over the car to the insurance, we'd like to get the fuel out of ...
9
votes
2answers
278 views

Why do we need to cool air after it leaves a turbocharger?

When we are using a turbocharger to compress the incoming air, the air gets hotter. Usually this hot air is cooled by using intercooler before it is passed to the engine. But what is the reason ...
9
votes
4answers
21k views

Why does a Turbocharger only produce boost when the engine is under load

As per the Title. Why does a turbocharged car only produce significant boost whilst the engine is under load. Is is something to do with how much exhaust is being produced or is there some kind of ...
9
votes
6answers
12k views

Do I need to torque my spark plugs?

I have never torqued them before on several vehicles that I do tune ups on. I just apply a bit of anti-seize lube and get them "snug" and everything seems to work fine. Should I be using a torque ...
9
votes
2answers
212 views

Proper Jack Location

In general, where is the best place to put a jack to prevent damage when lifting?
9
votes
7answers
27k views

Does a strut tower bar have any useful effect on chassis stiffness for a car with 100K miles?

Aftermarket strut tower bars are generally considered to be decorative on many brand new cars. However, it seems to be a bit more logical that a chassis with 100K miles would have developed some flex ...
9
votes
5answers
18k views

What causes brakes to pulsate right after rotor and pad replacement?

I have a 2002 Infiniti Q45. I replaced the front rotors and pads on Sunday. It was the first time I've done this on a car, though I have done it countless times on various motorcycles. I was careful ...
9
votes
4answers
7k views

Causes of early clutch failure EXCLUDING driver style

UK 61 plate, Ford Diesel Mondeo Estate, Econetic: clutch replaced at 31,800 miles; failure caused by 'driver style' I use my car daily for commuting and for business. It's supplied to me as a company ...
9
votes
2answers
17k views

What is BCM(Body Control Module) in a car?

I own a Fiat Grande Punto. Recently I was told by the authorized auto workshop that the BCM in my car has failed and needs to be fixed. So i have two questions regarding that - What is a BCM and ...
9
votes
4answers
1k views

How to troubleshoot excessive timing retard?

I've seen numerous cars that for one reason or another, retard timing excessively at wide open throttle - getting worse over time. Seat of the pants impression is that power drops off steeply as RPMs ...
9
votes
3answers
708 views

Is 60/40 solder fine for splicing wires that have to endure hot engine bay temps?

I need to splice the pigtail connectors from my old O2 sensors onto the new O2 sensors since the new connectors have a different shape. As the sensor is right behind the engine and will experience ...
9
votes
6answers
114k views

When do brake rotors really need to be replaced?

I need to replace my rear brake pads. A mechanic suggested I also replace my rotors because they are rusted around the edges. The rotors are in fact quite rusted, however, there is no rust on the ...
9
votes
5answers
2k views

How to properly change out spark plugs?

I am looking into how to change out my spark plugs on my 4 cylinder 2005 Mazda 3. All I know to do is: 1: Open each cylinder. 2: Use a spark plug socket (with the rubber insert) to remove the old ...
9
votes
7answers
8k views

Most important preventive maintenance for high-mileage car?

My 2001 Chevrolet Prizm (a NUMMI) is about to hit 125,00 miles. I bought a little over 5 years ago, at which time it had ~79,000 miles on it. I bought it from a used car dealer that seemed to have ...
9
votes
1answer
5k views

What is the cause of belt squeak in the morning?

For the past month or so my 2003 Honda Accord squeaks in the morning when I start driving to work. After a couple of minutes of driving the squeak stops. I'm pretty sure it's from the belt area. What ...
9
votes
1answer
842 views

Front left controller arm corroded and broke on my 2002 Hyundai Elantra

I was driving home, heard a crunch, and then my entire steering wheel felt loose and turned a quarter turn to the left even though my car was still going straight. I was about 10 feet from home so I ...
9
votes
2answers
996 views

Should a mechanical “click” Torque Wrench be set to zero when not in use?

I have a standard click torque wrench. I was told I should set it to zero when not using it in order to keep the accuracy high. Is this true? Secondly, I have not been doing this since I purchased ...
9
votes
1answer
25k views

How do I program a Chevy Malibu Key with chip in it?

I have a '07 Chevy Malibu and would like to know how to program the key. I lost the original, but was able to get a spare from the dealership. I do not want to pay the locksmith $150 to program the ...
9
votes
3answers
956 views

Are there any advantages of idling a vehicle vs. turning it off and back on again?

I was sitting outside, eating my lunch the other day, and a small bus (you know, one of the short ones) pulled up to the sandwich shop I was eating at. I noticed that the driver got out of the bus, ...
9
votes
2answers
2k views

Is there a measurable benefit to replacing spark plug wires?

My 92 Civic has very old spark plug wires, probably original, but their resistance is in-spec (under 20k ohms), they have no external damage, and the vehicle has no misfire or other symptoms ...
9
votes
1answer
5k views

Is this what is making my car sound like a racecar?

Recently, my car (2000 Mercury Grand Marquis) started sounding like a racecar: the engine became very loud. There's clearly something going wrong with the exhaust system. I'm trying to understand ...
9
votes
3answers
799 views

What to know before buying and OBD-II reader

I read the features to look for in an OBD-II reader, but I am curious if getting one is the right move. I'm just planning to get a cheap one, which is proving to be interesting shopping local. What I ...
9
votes
3answers
455 views

What are good features to look for in an ODB-II reader

I recently took my car in for the engine light. It turned out to be a minor problem (crack in gas cap let water in). It would be nice to have a low-cost ODB-II reader to be able to find out for ...
9
votes
3answers
143k views

Will Putting An Extra Quart of Oil In My Car Ruin It?

I put too much motor oil in my car's motor. About a quart - have I ruined my car? I've been driving it. I know I need to get the oil drained. But I'm worried that I've ruined my car which has been ...
9
votes
2answers
321 views

How to I stop the 'never-ending' turn signal?

I have an '07 Chevy Malibu, whose turn signal doesn't seem to disengage whenever I make a turn, unless it's more than roughly 160 degrees (a U-turn). What are some of the possible causes and are ...
9
votes
2answers
250 views

What factors affect the maximum air pressure that should be put in a vehicle's tires?

For just about every car, there's at least two different "maximum tire pressure" ratings. The vehicle manufacturer's rating. This is usually found on a sticker attached to the driver's door. The ...
9
votes
2answers
22k views

Must I Replace All 4 Tires on an All Wheel Drive (AWD) Subarau, when only 1 is damaged?

I have a 2005 Subaru Legacy 2.5i Wagon. I just destroyed the passenger-side rear tire. The tires have approx. 6/32" tread remaining, per an informal measurement with a coin (I used this guideline ...
9
votes
3answers
3k views

What is a hot patch, and how is it done?

I recently picked up a piece of metal in my tire, leading to a flat. The mechanic said he could not plug the tire, and that a "hot patch" was required. What is a hot patch, how is it applied, and ...
9
votes
4answers
3k views

2000 Jetta runs rough, shutters on cold start only on wet days.

This is an issue I've had off and on for, embarrassingly, at least a year: On misty or wet mornings, everything starts out fine but, a few minutes into the drive (like clockwork. I even know the ...
9
votes
1answer
1k views

How do I find the correct pins in a CAN-BUS connector?

This question might be too technical for this forum, but I'll give it a go. I have a 2012 BMW R1200R motorcycle with CAN-BUS. I'd like to make an Arduino interface to the connector on the bike, but I ...
9
votes
1answer
2k views

Car Parts Software To View Parts of a Car

Is there computer software that lets you see parts of a car for common car models, like European brands, and browse them in 3D. Is there anything that would have autocad schematics or something like ...
8
votes
5answers
28k views

What does the 'cc' mean on a motorcycle?

I'm relatively new to motorcycles, my flat mate taught me how to drive his two Royal Enfields around New Delhi, and for the past year and a half I've been taking care of them as they break down ;) ...
8
votes
4answers
6k views

How do I select the right oil for my car?

I can give you my cars make and model and the conditions that I drive in, but I'm looking for a general guide to selecting the right oil for a car. I'm not really knowledgable when it comes to cars so ...
8
votes
5answers
629 views

Should I buy a car or get my current one repaired?

I am in a bit of confusion on what I should do. If this is not the right place for such a question, I apologize and I will gladly kick myself out - just let me know. I have a Honda Accord EX 2000 for ...
8
votes
5answers
12k views

Is it normal for the oil to be dark in color right after an “oil change” in a 10-year old diesel car?

I took my 2002 Jetta TDI wagon to a neighborhood shop about 10 miles, 24 hours ago. They supposedly changed the oil, but the color is very dark, almost black. Definitely not light-colored/transparent. ...
8
votes
3answers
3k views

Catalysator broken? Odd rope coming out of the exhaust pipe

[UPDATE] SOLVED! Hurray! The muffler had corroded inside and it blocked the exhaust system, making bad to motor. I got it fixed and the car energy efficiency improved from 12-15 liters/100km to ...
8
votes
4answers
48k views

What could cause my Honda Civic to not start? And how can I address the issue?

I need help trouble shooting my honda civic. It will not start. I was driving it earlier today and I went to drive it again when it would not start. I'm glad I was at home when it decided to quit. ...
8
votes
5answers
4k views

Car crash: when does a car catch fire?

Which kind of crash does it need for a car to catch fire? I'm asking because I was discussing about an accident where a car crashed into a full-grown brown bear. Is it realistic under normal ...
8
votes
5answers
836 views

Is shifting to neutral on a decline more fuel efficient than keeping the gear engaged?

I always had the habit of shifting to neutral on long declines and using the brakes to slow down as needed. Intuition made me believe I'd be saving fuel as opposed to keeping a gear engaged. However, ...
8
votes
3answers
2k views

Can my tire blowout be attributed to a lower speed rating?

Yesterday I had a tire blowout. When I visited a tire shop (Costco Tire Center) afterward, the person there told me that my tires are under-rated for my vehicle. My vehicle is a Honda Accord 2002, ...
8
votes
3answers
4k views

Is it harmful to drive at high rpms

Does driving at high RPMs (3000-3500) in a manual transmission car cause any extra wear and tear to any mechanical parts? It obviously hurts gas mileage, but does it hurt anything else?
8
votes
4answers
2k views

Gasoline is dripping out of a rubber tube outputting on the bottom of my motorcycle - is this normal, or is it a problem?

What bike? A BMW 650, 1996 model. What's the problem? I noticed a slow, but steady, drip of gasoline from one of two rubber tubes that output to the bottom of the bike. I think the other rubber ...
8
votes
2answers
618 views

How much air should a tire lose each month?

How much air does a tire typically lose each month? Do nitrogen-filled tires actually lose less air (well, nitrogen) each month? If so, what's normal for them? According to a tire store manager I ...
8
votes
3answers
31k views

How long can I drive on a donut spare?

This is a pretty common question and I get a lot of conflicting responses from "Extremely dangerous could blow out at any minute" to "I've driven on it for a month". A mechanic at midas told me I ...
8
votes
2answers
3k views

Why might I experience a power falloff after starting my car with the AC On?

I have a 2000 Chrysler Neon which generally runs well. I have noticed that if I start the vehicle, turn the AC on and reverse out of the driveway, the engine seems to struggle/sounds like it is going ...
8
votes
9answers
22k views

Couldn't start my Volvo due to Key Error. Called assistance and he fixed it by hitting the key with a screwdriver. What could be the error?

My Volvo S40 (06) would not start when I turned the ignition key. I got a message that was somewhat like "Key Error, please try again". I tried with both my keys so it wasn't the key itself. I think I ...
8
votes
4answers
632 views

What problems may occur if clutch is not used?

I was curious about what problems may arise if clutch is not used when shifting gears. Are the problems similar for both cars and bikes?
8
votes
1answer
5k views

Where can I find my car's colour code?

I'm currently shopping around for a touch-up pen to repair some very light scratches on my car. I've found out that our local hardware automotive store can mix the exact colour for any vehicle. ...
8
votes
1answer
376 views

What is name of this part in the picture?

Could you guys please tell me the name of the part in red square in English?

15 30 50 per page