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
68 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 ...
10
votes
1answer
98 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
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 ...
6
votes
1answer
168 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
35 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
165 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
295 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
202 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
32 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
24 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
67 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
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 ...
4
votes
1answer
44 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
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 ...
7
votes
2answers
96 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
297 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
52 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
59 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
104 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
98 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
253 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
45 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
411 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? ...
40
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
108 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
239 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 ...
7
votes
1answer
481 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 ...
5
votes
1answer
71 views

2006 Honda Fit loses power after starting, but runs normally when warmed up

I have a question similar to this one: "What would cause a car to lose power a few seconds after starting, then run normally?". The answers from that question didn't help me for my car and I am having ...
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 ...
8
votes
1answer
59 views

Need help installing engine with 2-wire crank sensor into 3-wire setup

My problem is the 2008 chevy trailblazer 4.2 has a 3-wire crank sensor and the reluctor ring on the crank looks similar to a bicycle sprocket. While I did not look at the reluctor ring on the 2005 ...
16
votes
8answers
2k views

Will having a radiator full of engine oil do damage to the motor?

I've got one question; I was looking over this car that I was going to buy and there was engine oil in the radiator. I asked the guys why it was in there and he said he didn't have enough coolant to ...
5
votes
1answer
144 views

Does a screw in the tire mean sidewall damage and tire replacement?

I bought my 2015 Hyundai Sonata last March (2015) and it has about 17,000 miles on it. I just found a screw in the rear driver side tire. Shows a slow leak when I took to a tire shop and they applied ...
5
votes
1answer
85 views

How to get the most money out of potentially totalled car?

I crashed my car :( Accidentally rearended a pickup :( It's not drivable because the radiator fell out, but I was told by the guy who towed it that the frame wasn't damaged. I don't know what to do ...
18
votes
3answers
167 views

What's the most environmentally responsible method of car parts cleaning?

I'll be the first to admit that this one has been hard for me. I clean cylinder heads, axle bearings, calipers, crankcases....the list goes on. I want to be clear here. I am not talking about ...
4
votes
2answers
63 views

2006 Pontiac torrent

2006 Pontiac torrent won't start. Brand new battery one week old, will not start with remote starter or either key! All the lights come on , radio and electronics but when I turn the key the final bit ...
5
votes
0answers
46 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 ...
3
votes
1answer
45 views

98 Saturn SL2 Starter and Water Pump Will Not Work [closed]

I just put in new radiator and sometimes the car will start, but not lately. It is also heating up quickly. I think that both the starter and water pump are not working due to some sensor or fuse they ...
7
votes
1answer
110 views

Engagement delay when shifting from neutral to drive or reverse

My 2001 VW Eurovan (T4) has automatic transmission and about 160k miles on the clock. When I use the transmission selector to move from N to D or from N to R, there is a noticeable delay until I feel ...
8
votes
2answers
143 views

Natural Gas Engines - What are these things?

Someone I knew when I was younger converted a car to run on compressed natural gas (CNG) because CNG was extremely cheap in comparison to petrol or diesel. How can cars be converted to run on CNG and ...
6
votes
3answers
104 views

Steam Engines - What are these things?

I know that steam engines are considered to be old fashioned, impractical and rarely used. Why are they considered impractical therefore rarely used? How exactly might a steam engine work to power a ...
6
votes
1answer
74 views

External Combustion Engines - What are these things?

What are external combustion engines? How do they work? What types of external combustion engines are there? What are all the common advantages and disadvantages of external combustion engines in ...
5
votes
1answer
79 views

Is the Ford Fiesta 2008, style climate D, 1.4 TDCi engine made by Peugeot?

Is the engine made by Peugeot or Ford? Apparently if it's Peugeot, it could be prone to the turbo failing due to engine fault.
1
vote
1answer
25 views

What “type” of engine does a Ford Fiesta, 2008, style climate D, 1.4 TDCi have? [duplicate]

a mechanic asked me this and I didn't know the answer.
9
votes
3answers
298 views

Location of exhaust manifold

In four cylinder engines, why are some cars designed with the exhaust manifold towards the front of the car while other cars have it towards the back? Is there any advantage in one design over the ...
3
votes
2answers
62 views

Hyundai Accent starting issue

My car started fine a couple of days ago and today when I went to start it, it won't even turn over. The lights work, the battery is only a year old. Not sure where to check next. Any suggestions??? ...

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