19
votes
2answers
1k views

How exactly does a differential work?

I understand that the differential (or "diff") is the thing that allows the drive shaft to transfer its rotational velocity to the front or rear axle in order to move the car. As far as I know, the ...
12
votes
2answers
335 views

Yamaha R1 intake tract configuration

Interesting Configuration The Yamaha R1 has a very strange intake design. Notice the intake horns in the image below. They sit above the throttle bodies and are not attached directly to them ...
5
votes
1answer
95 views

Brake Mean Effective Pressure, how is this an effective measurement tool for engines?

Many engine designers measure success with Brake Mean Effective Pressure What are the equations used to calculate Brake Mean Effective Pressure? Why is this a more or less effective measurement ...
7
votes
1answer
85 views

Vespa PX 150 Fuel and Carbon issue

I am using Vespa PX 150.It is using Contact Point system. The issue is it is consuming fuel more than average and the plug is full of carbon after approx 50 Km.The engine not start unless I clean the ...
8
votes
1answer
83 views

Pneumatic Valve Spring Operation in Formula 1

In the 2006 Formula 1 World Championship the rules allowed for pneumatic valvesprings. These engines were required to have a 90° V8 engine with 2.4 liters of displacement, 4-valve-per cylinder layout ...
4
votes
1answer
38 views

Mercedes Benz E300 BlueTEC HYBRID

Could anyone please tell me what BlueTEC HYBRID and Blue Efficiency mean and the pros and cons of those ? Are those better than BMWs Efficient Dynamics ? Common faults they undergo ? Maintenance ...
6
votes
1answer
67 views

2000 Celica engine dies or shakes when I pump gas

I have a 2000 Toyota Celica. At first it used to slip gears and then I had a mechanic check it out. He said its a solenoid in the transmission which he changed. The car sputters sometimes when at ...
1
vote
1answer
75 views

Water Powered Cars - What are these things?

Whilst looking up the answer to another question using Google regarding the water output from a normal internal combusted engine powered car, I noticed that - to my surprise - all the top hits were ...
10
votes
2answers
77 views

Do I need to replace both front struts if one is OK

I have a car that is 7 years old and unfortunately hit a curb which bent the front strut on the drivers side. Do I need to replace both struts? Or just the damaged strut? It is similar to this ...
1
vote
1answer
53 views

Toyota Premio SMART Key

I have lost my Toyota Premio Smart Key, how do I get a replacement? Is there anything I should do to prevent the old key from being used if it was stolen? Thanks in advance
4
votes
1answer
58 views

Nissan Leaf 2013 - 2015 Model

I like the Nissan Leaf. I want to know if it can travel a maximum 180 Kms. Is there a portable device that could charge the vehicle? Why do car experts say it is not good to charge it daily from a ...
3
votes
0answers
22 views

LandRover Defender Discontinues [closed]

Today morning I came across this sad story. Land Rover Defender production to end this Friday (29th Jan 2016). Link : http://www.dailypost.co.uk/business/business-news/land-rover-defender-...
7
votes
2answers
153 views

Key Doesn't come out of Town and Country

A few days ago I could not get my keys out of my 2005 Town and Country. Soon after, the battery ran out of juice. If I jump the battery, I can start the car and drive it. But when I park the vehicle I ...
2
votes
1answer
30 views

Where can I buy the i-mid wheel button's for a 9th generation Civic? [closed]

I have a 9th Generation Honda Civic (2012). It has wheel buttons which have worn down (actually transparent the cheap paint came off), and one of the sides even chipped. This is on the left side of ...
7
votes
0answers
54 views

My engine stalled and wont restart - after downshifting - Automatic Trans [closed]

My engine stalled and wont restart - All I did was downshift... 2005 Chrysler Town & Country Limited. V6 - 3.8 Liter EFI. For some history, a couple days ago I noticed a clicking sound - it ...
3
votes
1answer
59 views

1995 Mercury Grand Marquis, loud whine corresponding to engine revving

My '95 Grand Marquis (or as I like to call it, a Grandma Rquis) is suddenly very loud. There doesn't seem to be any issue with the performance, and when it's idling, it's as quiet as can be. I'm ...
3
votes
1answer
33 views

2006 Mazda 3 low brake pedal

I have an problem with the brakes after the ABS has been activated on snowy roads the brake pedal drops about 75% and stays there for quite a while. Eventually it comes back up to a regular pedal ...
6
votes
2answers
65 views

What is the best “automatic” gear to be in when going up a snowy incline?

My car is a Volvo S80, it's great in ground-level snow. I tried going up an incline in "D" and it wasn't having it, basically just slowed down and stopped dead in its tracks. I have never used the 3 ...
10
votes
3answers
392 views

What exactly is a catalytic converter and why does it need to operate within a certain range?

I heard here that a catalytic converter needs to operate within a certain "chemical range" otherwise it will generate unnecessary heat. What exactly is a catalytic converter? How does it work? What ...
15
votes
6answers
2k views

Why or why not increase engine efficiency by running the car “fuel-lean” (using a turbo or supercharger)?

Everyone wants their cars to use less fuel, right? I read the following passage about running the car fuel lean from this website: Run the engine fuel-lean, that is, use excess air. It is well ...
4
votes
1answer
81 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 on-...
10
votes
1answer
137 views

What are the pro's and con's of compression braking vs. exhaust braking?

My truck supports 2 types of engine brakes: Compression release brake Exhaust brake Both can be selectively deactivated using switches. What are the pro's and con's of each type of engine braking ...
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. ...
14
votes
1answer
2k 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 ...
6
votes
1answer
181 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. ...
1
vote
0answers
37 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 ...
5
votes
1answer
195 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
2answers
301 views

What battery should I buy for my vehicle?

My girlfriend has a Nissan Versa 2014 (although this question still applies for any other car), and I need to buy a battery for it. I went to both Walmart and Advance Auto parts and there are lots of ...
13
votes
2answers
260 views

How does a transfer case split power between front/rear?

I've read somewhere that transfer cases (on 4x4 vehicles) split the power from front to rear, but don't do it equally. Something along a 60% rear/40% front (though I'm sure it could be any percentage ...
4
votes
1answer
34 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 ...
4
votes
1answer
26 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
1answer
78 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)? ...
6
votes
1answer
67 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 ...
4
votes
1answer
47 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 ...
6
votes
1answer
46 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 ...
7
votes
2answers
124 views

Water leaking from bottom of engine

2003 Nissan XTerra The lower heater hose was leaking. Note: NOT the radiator hose. Ordered a replacement but kept driving wile waiting for it to come in. Got to the point that I had to fill the ...
8
votes
1answer
391 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 ...
4
votes
0answers
53 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 ...
0
votes
1answer
60 views

How much extra should I expect to pay to have a Turbo replaced at the dealership as opposed to at a garage? [closed]

The turbo on a Ford Fiesta 2008 TDCi is bust. How much should I expect to pay?
7
votes
1answer
71 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 ...
5
votes
1answer
148 views

How do I change my HDD navigation from Japanese to English?

I have a Toyota 2009 Mark X ZiO trd Sportivo and the model code for my navigation system is DBA-ANA10 and my car chassis number is ANA10-0030599. How do I change the language from Japanese to ...
8
votes
1answer
61 views

Would bored out 307 need new heads

I have a Chevy 307 with casting number 3970020 and everything I've read says this particular block can be bored out to 4" effectively making it a 327. I plan to have my machine shop test it and make ...
7
votes
2answers
109 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 ...
9
votes
4answers
380 views

Disabling OBD2-Interface in a car

If a car-thief wants to steal a modern car, he often uses the OBD2 (On Board diagnosis) to "hack" the car. Simplified: He achieves this by plugging his "hacking device" in the port, which aquieres ...
4
votes
0answers
22 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. ...
4
votes
0answers
47 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 ...
10
votes
1answer
420 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? ...
42
votes
6answers
3k views

What is the most efficient method of getting your car unstuck from snow?

If your car is stuck in snow and you don't have any chains, what can be done to get it out? This can be an unnerving problem to have and it happens pretty easily with normal driving on ice. You wind ...
8
votes
3answers
112 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 ...
9
votes
1answer
304 views

How does intake manifold runner length effect the power curve of a car?

Recently I learned that a number of things such as the cam profile, compression ratio and the intake manifold runner length and volume can all effect the power curve of the engine. Here is an ...

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