3
votes
0answers
45 views

What driving speed gives the best fuel economy? [closed]

If you are running low on fuel in a gasoline powered car I guess driving at a constant speed is best and turning off stuff like the AC would be wise . I suppose keeping the car in a reasonably high ...
8
votes
2answers
285 views

What factors are considered when deciding on gasket material?

Automotive gaskets come in many materials, shapes and sizes and find application in many places. I'm curious to learn more about why manufacturers use certain materials for certain applications. I ...
11
votes
3answers
150 views

Multimeter - Basic Functionality and Howto

Multimeters I'm looking for some responses regarding multimeter basics for the site tag-wiki to point OP's at when we want them to use one. The question is; What are the basic functions of a ...
5
votes
0answers
42 views

what would cause lack of movement in the gas pedal, causing slow acceleration? [closed]

I have a 2002 Hyundai Elentra. Until yesterday every thing was fine. Yesterday I noticed the car was not accelerating normally. I also noticed my gas pedal basically had almost no movement. No ...
9
votes
3answers
227 views

How do you test analogue electrical circuits?

When trying to diagnose problems with conventional analogue electrical circuits, such as lights, speakers, heated rear windows, etc, as well as short-circuits and unexplained current draws, it can be ...
12
votes
4answers
5k views

Difference between high octane and low octane?

What is the difference between high octane and low octane fuel? I'm not asking if one is better than the other for my vehicle, specifically, but rather what occurs differently both scientifically and ...
2
votes
0answers
37 views

2004 GMC Yukon Denali, intermittent no crank/no start/no noise

OK, it started doing this a few months back with no rhyme or reason. Before this happened, sometimes would start beeping after engine start. A long 18 beep procession. Don't know if related. When ...
8
votes
1answer
102 views

Disconnected wires near battery in BMW e46

I noticed a disconnected wire dangling next to the battery in the trunk of my 2005 BMW 330ci. It was actually a red and blue wire that veered off from the thick red one in the middle of the image. ...
6
votes
1answer
126 views

Ticking noise while idling that increases with acceleration

2013 Chevy Cruze. 86000 miles. Our car has been ticking while idling, and the noise gets louder and faster when accelerating. Oil has been changed regularly. Water pump was changed recently due to a ...
5
votes
1answer
49 views

Strange brake noise

https://goo.gl/photos/8J9acXhHpqFL3nau5 My car just started making this noise when I apply the brakes. It persists for a few seconds after but only if the car is moving. Any ideas what is wrong? ...
5
votes
1answer
45 views

1995 Dodge Viper

So my friend is interested in this 1995 Dodge Viper he's seen on a pre-owned showroom and I have some questions that I'd like to ask. What kind of questions related to that specific car should we ...
5
votes
1answer
59 views

Van makes knocking noise, even after it has been off for hours

I have an '05 Sienna. At 7 this morning, it was making a knocking noise when I went to leave for work. It had been off since about 9:30 last night. Clicked unlock on the remote and nothing happened. ...
12
votes
4answers
1k views

Tire SideWall Damage. Replace?

Yesterday I bumped into a curb and my tire has sidewall damage. Is this tire safe to drive on? or do I need to replace this tire?
1
vote
2answers
52 views

Overfilling the oil level [duplicate]

I recently had my oil changed on my 2004 Buick Century. Does overfilling the oil level harm the engine?
10
votes
2answers
745 views

What bolt is a replacement for the front sway bar bolts on a 2004 Subaru WRX wagon?

In replacing my worn-endlinks recently with lovely Kartboy pieces, I noticed that I had a seized bolt in one of the rear links. I was able to get a short-term replacement until I order a new Kartboy ...
5
votes
4answers
2k views

RPM bouncing when in idle, especially when AC in switched on

I have a diesel common-rail 1.5l engined car. Lately I am facing an issue where the RPM needle is bouncing in the tachometer when the car is idling. The normal idling RPM is around 820. When idling, I ...
10
votes
1answer
51 views

City Jetta Passenger Windows Unresponsive

I have a 2008 VW City Jetta. About a month ago, I had a remote car starter installed - big mistake. Upon installation, all passenger automatic windows were no longer responsive from either the driver ...
4
votes
1answer
81 views

Battery light flashing after alternator install on 2004 Ford Escape

I just put new alternator on my 2004 Ford Escape, and now my battery light keeps flashing on and off, and it will sometimes stay on. The battery has been checked and is charging 100 % . The alternator ...
11
votes
3answers
19k views

What disadvantages a car with 4-speed transmission have compared to 5, 6 or 7 speed with similar engine?

This seemed to be most relevant site to ask my question. I am planning to purchase a new car and my shortlisted car has 4 speed automatic and 1.6 litre engine. The thing that worries me is that it ...
7
votes
1answer
177 views

Why would my odometer reset to the same mileage whenever I turn off the ignition?

I have a 2000 Nissan Altima and the odometer (not trip meter) reads 86186 miles when I first start the car. As it's driven, the odometer seems to work correctly, incrementing miles. But if I turn off ...
47
votes
7answers
7k views

What to check when buying a used car?

I'm looking to buy a used car. What do you think I should check (mechanically) before buying it (especially if it's diesel)?
3
votes
3answers
114 views

While raising the accelerator suddenly my bike's speed goes down

While driving, I faced some problem in my bike. when I raise the accelerator suddenly my bike's speed goes down. Anyone knows what is the problem?. I'm using yamaha ss 125 cc bike.
7
votes
2answers
268 views

Distinguishing between mechanical and electrical failure in ignition diagnosis

After a month and a half of not driving the car, yesterday I tried to turn it on, however the only sound that I heard was the rotation of the starter, which is not engaging the flywheel (the engine is ...
6
votes
3answers
318 views

Car stored for 6 months shows low oil level after 300 miles

Just bought a car from a BMW dealer and the guy told me it was sitting for almost 6 months before I came to purchase it. When I left the dealership the oil was above the min mark showing green. Drove ...
6
votes
1answer
82 views

Weird grinding sound from the gear box

It is not like when you try to shift a manual stick without the clutch. But a lot lighter than that varying in amplitude (louder and lower) and probably is only there when the engine is cold (Because ...
3
votes
1answer
2k views

2003 Suzuki Katana 600 won't start

My bike doesn't want to turn over. It ran just fine last week, but something has changed. I have enough power with a new battery and I can hear the motorcycle trying to turn over. The exhaust pipe ...
10
votes
2answers
2k views

Pulsar 180 - How Can I Measure the Mileage?

Could anybody please tell me how to measure the mileage of my Pulsar 180 bike accurately? I have tried by emptying my tank. I failed miserably, and I had to take my bike walking long distance.
4
votes
1answer
85 views

Should I worry about buying this bike?

I'm looking at buying a 2014 Ninja 1000 with 1,400 miles on it. I asked the guy about the maintenance he's performed and he said he hasn't done anything to it so far. I know you should change the oil ...
5
votes
2answers
217 views

Motorcycle won't turn over immediately after a pit stop

Motorcycle: 1980 Honda CB900 Custom. After refilling the battery with distilled water, getting it charged and letting the motorcycle sit for a few days... I then went for a ride yesterday. The ...
8
votes
3answers
700 views

2007 BMW Z4 won't start when my phone is plugged into the cigarette lighter plug

Sometimes when my cell phone is on charge in my 2007 BMW Z4 before I start it, nothing happens when I turn the key. The car is acting like it, as if I did not have the clutch pushed in - the key ...
3
votes
1answer
98 views

Which operations are done when key is turned to On position?

I would like to know which operations or functions does the car do when I turn the key to On position (the key position before starting the engine) in gas engine and in diesel engine. For example, in ...
5
votes
2answers
93 views

Very slight arcing of good spark plug wires

While looking for the reason of occasional misfires I checked if my spark plug wires are arcing at night. There was no textbook arcing with popping sounds and pretty lights, but there was extremely ...
9
votes
2answers
60 views

Losing coolant fast after just fixing radiator

I have just got my coolant tank and radiator replaced after a leak in the radiator and a cracked coolant tank. I filled the coolant tank last month and now it is nearly empty. I am just wondering if ...
8
votes
2answers
182 views

Follow up question on spark plug heat range

@vini_i gave a great answer to my previous question here (What is spark plug heat range) Part of that answer is that the reason for spark plugs having different heat ranges is that if it runs to ...
6
votes
2answers
52 views

Do I Need to Replace Complete Rear Brake Components

I inherited Mom's 1999 car with 47K on it, it was garaged for several years. I've noticed the brakes squeal intermittently dependent on how hard the brake pedal is applied. So I had a brake inspection ...
3
votes
1answer
50 views

Engine Temperature from OBD data

Engine Coolant temperature is obtained from OBD. But there is no PID to get engine temperature. Obviously, they are related, rather proportional I guess. But can there be a case where my engine is ...
9
votes
2answers
545 views

What is a “crank throw” and how can I determine the number of crank throws on an engine?

This term is confusing me a little and I wanted to make sure I understood it correctly. Based on my understanding of the Wikipedia article, it looks to me like a crank throw is what allows the piston ...
0
votes
0answers
10 views

use SAE80W/90 instead of EP90 [duplicate]

Can I always use SAE80W/90 API GL5 instead of EP90 for my good old Masport lawn mower's gears? I can't get EP90, which the manual asks for, anymore. ...
8
votes
2answers
99 views

Old starter clicked, wont turn over engine. New starter wont even click - no noise at all

My old starter would click, but not turn the engine over. I got a brand new starter and installed it. The only two wires connected to the starter are completely different and can only be fit in the ...
9
votes
5answers
98k views

Car shakes when in gear at red light

I bought a '96 Toyota Camry about a month ago. When I first turn the car on and the engine is cold, I can have the car stopped (in gear) and it will not shake. The idle RPMs will be at 1000. After ...
7
votes
3answers
2k views

What kind of engine oil should one use in a diesel?

I got an 1987 Toyota Land Cruiser with a 2H diesel engine. I never changed oil on a diesel engine prior to this truck, so I'm a little confused. Toyota Factory Shop Manual recommend API CC oil type, ...
7
votes
1answer
51 views

2004 VW Passat B5.5 - Is one of my heated wing mirrors actually broken?

I have been having an issue recently which may or may not be related to this other problem that I have been having regarding the heating element in the left wing mirror on my car. I have that with ...
4
votes
0answers
25 views

How to restore and care for leather?

I have an old car and I am wondering about the processes involved in cleaning the leather on it and bringing it back to an almost new looking state. The roof exterior roof is leather and the whole ...
6
votes
1answer
7k views

How does low oil level cause misfires or VTEC malfunctions?

So a few days ago my 2003 Honda Civic EX started misfiring while accelerating, especially with the A/C turned on, making popping noises, and then yesterday got a P1259 "VTEC system malfunction code". ...
9
votes
1answer
361 views

Locked out of my accord

My 2013 Honda Accord EXL the battery died the key fob won't open the door and neither will the manual key what can I do
14
votes
3answers
32k 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?
12
votes
1answer
131 views

How does the tachometer on my dashboard actually work?

Recently, I asked a question about the speedometer, how it works and how accurate it is. But that got me thinking... how does the rest of the dash actually work? I understand that the RPM measurement ...
4
votes
0answers
55 views

2006 VW Jetta Diesel won't warm up [closed]

A couple of years ago the VW (2006 Jetta) quit warming up. No heat, no defrost, temperature gauge reads cold! I changed thermostat and tested both 'stats at the same time. Both opened right at 195 ...
10
votes
2answers
443 views

Ferrari 3.0L V8 - muffler positioning, and x-flow for specific sound

I am re-designing a Ferrari exhaust system with 2 objectives: 1: enhance the specific high pitch raspy sound that you expect from a small Ferrari V8. 2: achieve a good free-flow design. There is ...
5
votes
1answer
14 views

1999 Grand Prix started to consumed gas

My 1999 Grand Prix is well-maintained. After an oil change it started to consume gas and oil as usual for a week, then started to shake when idling, and slow and gaging when accelerating and feel ...

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