14
votes
1answer
1k views

What is a governor and what is it used for?

I was watching a classic car restoration program on YouTube in which they were working on a '50s Cadillac with an automatic transmission. The mechanic in the video diagnosed a transmission glitch as ...
4
votes
2answers
2k views

Old Cars Burning Oil: How much is too much?

I've heard that it's "normal" for older cars to burn a certain amount of oil and that it's not really a problem. My question is how much is too much? At what threshold does burning oil become a ...
3
votes
1answer
62 views

How to control a car (accelerating, braking, steering) programmatically? [closed]

I would like to make a prototype autonomous car out of an off–the–shelf car (Toyota Yaris to be exact, but the instructions should be universal). One of the first steps is to get access to the ...
6
votes
2answers
22k views

Coolant/antifreeze leaking out of engine block (See photo/video)

I'm not sure exactly what is going on with my vehicle ('98 Wrangler, 4.0L), but it's pretty obvious something is wrong. I think I might have had some minor coolant leaking after the past few times ...
6
votes
1answer
59 views

BMW E90 pre facelift - REST heat button / fuse

In my E90 I have a REST button: It seems not to work, when I press it, the LED won't light and the heating won't work. Could this be a defect fuse? And if yes, which one (could it be 15 and/or 67)? ...
4
votes
1answer
23 views

Valve Guide Replacement - 1988 Jeep Wrangler

I've done some valve guide replacements on motorcycles. In the process I've typically done I heat the head up in an oven to about 300 F and shoot nitrogen into the guide which shrinks it and it ...
6
votes
3answers
339 views

How To Pump Up Car Tires (finding the optimal PSI for your tires)

I have noticed that all the tires on my VW Passat B5 have "44 PSI" written on them except the spare that has "51 PSI". This seems incredibly high to me so when I filled them up recently at the petrol ...
23
votes
3answers
3k views

Why does a gas engines torque and horsepower curve always meet at 5252 RPM?

I'm watching a TV show called Tech Garage and they just made the claim that an engines torque and horsepower curves always meet at 5252 RPM. Assuming this is true, why does this happen? Is it ...
6
votes
3answers
2k views

Motorcycle with EFI not starting well

I have a 2012 Kawasaki W800. On cold mornings it is difficult to start - it turns over quite a few times before it catches. This is compared to my old carburettor bike which started instantly with the ...
7
votes
3answers
6k views

Motorcycle popping on acceleration

I have a 1975 Honda XL250 that I bought earlier this summer. Up until recently its been running great. It was leaking a little gas, but nothing too serious. When it started to get worse, I opened up ...
5
votes
1answer
129 views

2008 Toyota Corolla 141 Fuel Consumption Too High

I recently got a Toyota Corolla 141. The petrol consumption is too bad. It does only around 7.5-8 Km/l. Could you please let me know the reason behind this ? I was told that the vehicle is too heavy ...
4
votes
1answer
35 views

Blows cold until the car is moving

2009 Equinox Sport. The car is warm but, the air blows cold until the car is moving. I am assuming the thermostat is stuck until the flow is increased but, would like to verify or troubleshoot better. ...
6
votes
1answer
65 views

What exactly is meant by the phrase “plugging in your engine”?

I have found a relevant quote from here that might be related: Plugged-in engines are already half-warmed when started. Fuel consumption is thus reduced by an average of 15 per cent over the first ...
6
votes
1answer
166 views

Alternative fuel consumption metric to MPG to measure actual engine efficiency?

MPG is all very well and good, considering that most people that are concerned about their fuel consumption tend to want to get as many miles as they can out of it before they need to fill up again. ...
5
votes
0answers
45 views

Steering ratio for European Ford Focus Mk2 (2004-2010)

What is the steering ratio for the European Ford Focus Mk2 that was in production between 2004-2010? I can not find it anywhere... I need it for a research project. There is somewhat relevant answer ...
4
votes
2answers
215 views

Car battery won't charge above 50%

I had a problem starting my car after not driving it for two weeks. After charging the battery with a CTEK trickle charger via the cigarette lighter socket, the car started fine. I had my car battery ...
10
votes
2answers
89 views

Does Ford's heated windscreen/windshield normally drain excessive current?

When getting my battery tested for an issue in this post, the mechanic noted that when my Ford's "quickclear" windscreen heating element was activated and the engine running, the voltage coming from ...
7
votes
1answer
554 views

Why is there a hissing noise when I open my petrol cap?

When I fill up with fuel, there is often a loud hissing noise, as if you are opening a bottle of fizzy drink or something whenever I unscrew the petrol cap. It also seems like there are vapours ...
4
votes
0answers
50 views

2011 Ford Fusion Heater Issue

The battery went dead 2 days ago. After a jump start I began my drive to work. I initially noticed heat and then heard a sound as if my blower motor turned up to 11 (it was already at max at this ...
1
vote
0answers
31 views

BMW 320D E46 Facelift [closed]

I`m about to get a BMW 320D E46 Face lift model (2000) and that is 120K driven. I would like to hear whether its worth in terms of repairs, maintenance cost ? Do I need to go each and every garage for ...
4
votes
1answer
45 views

Toyota Corolla won't start without fiddling with the central locking first

Something's happened recently, and I figured out to start the car, I needed to use the Central locking remote to lock and unlock the car while being inside to turn it on. The button for the remote is ...
3
votes
2answers
4k views

2007 Chevy Aveo - battery, alternator, or something else?

I bought this car when it had 120,000 miles on it, a few weeks ago, for a grand from my friend who sold it to me with the caution that it had a few issues. I am a novice driver and needed a car to get ...
4
votes
1answer
31 views

Odd Transmission slip

My transmission gets these odd slips every once in a while. For example, today I was driving slow through town, I believe in second gear, and my foot was very light on the pedal. As I release the ...
6
votes
3answers
2k views

What determines when an automatic transmission shifts?

I'm working on developing an automatic bicycle (mostly microcontroller based) and I'd presume I'd be shifting in a similar way to a car. So my question is, what factors does the transmission take into ...
4
votes
1answer
41 views

2001 Jeep Cherokee sport check gauges light

Jeep quit at stop sign and left wife stranded man im in the Dog House. Question: any thoughts off the cuff for me? Last week check guages light came on charging gauge dropped all the way negative ...
7
votes
2answers
85 views

How can head port volume affect the power curve of an engine?

Recently I learned that even more things other than the ones already mentioned here can effect the power curve that is produced by the engine. Here is an example of one. I understand that there are ...
3
votes
2answers
590 views

How to know when automatic-transmission box needs to be changed?

My friend is very odd: this thread about durability comparison between automatic/manual durability meant to him that manual is always better option because you can learn to change the clutch and only ...
12
votes
7answers
14k views

Engine oil change and getting rid of old oil completely

After running the vehicle for a certain distance usually we will change the engine oil. This will not only give engine new life with the brand new oil but will also get sludge and other sediments out ...
4
votes
0answers
43 views

1989 7.3 IDI wont start

I have a 1987 F250 with a 1989 7.3 IDI swap, the truck always used to run great. I went outside to try and fire her up and she wont start. I've tried plugging in the block heater and using ether. It ...
0
votes
1answer
57 views
19
votes
8answers
136k views

What's the point of the D3 gear in an automatic transmission?

My Honda Civic has a D gear and a D3, which apparently prevents it from going into 4th. Why would I want to do this? What is it good for? Does it make my fuel efficiency better or worse? Does it ...
8
votes
1answer
414 views

Why did manufacturers go to other than 1:1 transmission ratios?

While reading this question it came to mind: Why did manufacturers start building transmissions without a 1:1 ratio? In the older transmission you'd see the 1:1 ratio all the time, either as the ...
8
votes
1answer
241 views

Consequences of a Dirty Intake Manifold

This is similar to, but not the same as my question Effects of Dirty Piston Heads and Intake Valves. Basically, I often see people talking about taking the intake manifolds off older cars to clean ...
6
votes
1answer
44 views

Cadillac CTS How to deal with water in spare wheel compartment

I live in UK and winter season is wet to say the least - I just found a swimming pool in the back on my Cadillac in spare wheel compartment. It's not to close to the edge but not to far ether. The ...
8
votes
3answers
102 views

What are common cold weather starting issues with cars?

Based upon the current weather in parts of the Northern Hemisphere, I would imagine there are some people suffering from all manner of cold related vehicle issues. What are some of the leading issues ...
7
votes
4answers
717 views

Corrosion on battery, won't start, making clicking noise, won't charge

I'm trying to charge the battery on my 2002 Celica. Here is some background: Battery is a bit old, around 3 years or so. Corrosion has been building on the battery to the point that it almost ...
4
votes
1answer
694 views

Volkswagen Golf MK4 - Oil temperature sensor coding out

I have a Volkswagen Golf MK4 TDI 85kw (AJM). After driving for a while and stopping, when I turn the ignition on I get an "Oil sensor workshop" message. After connecting VCDS I got this fault: ...
2
votes
2answers
183 views

Formula to calculate emission rates

OBD tells whether I have passed the emission test or not. I want to know the formula by which it calculates the rate of CO, NOx, HC emission from my car and compares it with some set threshold value ...
7
votes
1answer
68 views

Clutchless Shifting - Wears Rings or Assembly?

What gets worn, the synchronizer rings or the assembly? If both get worn, what are the specifics of that? And how long can they typically be expected to last (miles) if most driving is performed ...
3
votes
2answers
1k views

Is it possible to disable beep for opening door before shutting off the engine?

I have a Toyota Hybrid Camry with keyless ignition. If open the door (after I park the car) but before I shut off the engine the car will beep at me. This will continue until I get out and close the ...
2
votes
1answer
50 views

Radiator and coolant ports

I think I have a leak in my radiator because water came pouring out from under my car mazda 6s 2002. The only thing is when I opened my coolant cap it was still full. What could be the problem?
4
votes
0answers
21 views

2000 Mercury Marquis Check Engine Light Issue

I have a 2000 Mercury Marquis. When the temps were -20+ I went out and started the car often letting it run at 20 minute intervals. On the last day of the cold spell the check engine light stayed on. ...
7
votes
1answer
399 views

What is a head?

Due to this question I now have a fairly well-rounded understanding of what a head gasket is. I assumed that sometimes, when people would talk about "heads" that this was just an abbreviation of ...
10
votes
1answer
401 views

What is the safest way to jumpstart a car surrounded by snow, ice and water? Can I get electrocuted?

All of the water and snow in the coming days can make jumpstarting a car pretty unnerving. With all the electricity in car batteries and jumper cables laying in snow and water, what are the concerns? ...
8
votes
3answers
1k views

Looking for suggestions about what to try and fix on my tecumseh snow blower engine that stalls after you stop putting load on it

I have a troy bilt snow blower with a tecumseh engine and it starts great and runs great. Most of the time, anyway. It will scoop up snow and throw it just fine, and then for no obvious reason it ...
6
votes
1answer
243 views

why is it not good to stall a cold engine

I've always known that you cannot stall (regular turn off by turning key (i'm not sure how that's called in english)) an engine if it is not yet reached it's work temperature. For example, if i go to ...
7
votes
3answers
394 views

What actually happens when there is not enough coolant in a car engine?

I know that a lack of engine oil can destroy an engine, so I was curious as to whether it is just as bad to drive a car with a very low engine coolant. What is engine coolant? What exactly are all ...
4
votes
2answers
3k views

Lancer ex 2008 CVT - Slow Down warning on display!

Yesterday, i had the "slow down" warning on my display when i was doing above 180kmph on the motorway and i was no longer able accelerate. it was as if i was driving an electric car. Though after some ...
7
votes
5answers
153k views

What is the meaning of BHP and torque in bikes or cars?

BHP = Brake horse power. It says that it is brake horse power but it is generally relates with high pick up (your bikes reaches top speed in lesser time). So what does this actually mean?. Torque = ...
2
votes
0answers
21 views

What actually is brake horsepower (BHP)? [duplicate]

I know that BHP is the measure of power of an engine. I realised that I have no idea how the number (for example 540 BHP) relates to the engine itself. Does 1 HP mean one rotation of the crankshaft ...

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