2
votes
3answers
905 views

Does the size of engine cylinder affect the efficiency?

I mean that, if cylinder have a design in which piston can change its working area alternate. Is there any chance to affect the burning ratio in loss or profit to efficiency?
3
votes
1answer
1k views

Risks of “excess and lack” of Engine oil

I ride a Honda Stunner CBF 125 CC daily for approx 30 kms, with an average speed of 45 km/hr. I noticed that my motorcycle has been consuming too much engine oil like it not used to few years ago. ...
3
votes
2answers
125 views

Over heating problems please help

Hi I have a 2001 Ford Explorer that is over heating. I don't know what is causing it. I just replaced the radiator, water pump and the thermostat. It was fine for a few months then my girlfriend was ...
3
votes
1answer
599 views

Opel Corsa D engine issue?

I have a 2011 1.4 petrol Corsa D. When accelerating the car lurches. This doesn't happen all the time and is seemingly random. It may happen when I accelerate from 60 on the motorway back to 70 or 30 ...
4
votes
2answers
638 views

Motorcycle - sudden brake failure - suddenly gone - is it safe?

Recently, my old Honda ST 1100's front brakes failed. It was very sudden; meaning one moment, they worked perfectly, the other, not anymore. There was no gradual decline; no warning, nothing. The ...
2
votes
1answer
549 views

Motorcycle: Irregular brake bite (front single disk)

My motorcycle's front brake is giving a irregular bite. I don't know how to express it in words please check the illustration below. --------$^^^^^^^^-^-^-^-^-^^--^^^---^^^^^^----^^^| ~60Kmph ...
0
votes
1answer
98 views

Switching off the AC before turning off the engine to increase longevity - urban myth? [duplicate]

I was riding with a friend and he insisted that it's better for me to switch off the AC before turning off the engine because when you turn on the car the AC won't get switched on with it and the ...
5
votes
1answer
10k views

How should the lights for a trailer be hooked up?

I have a tent trailer and the lights don't work right. It has a 4 wire connector to my car but one of the wires on the trailer connector was worn out and probably not working. So I got a new 4 prong ...
2
votes
2answers
170 views

Steering wheel vibration at 60+ MPH

I recently purchased a new set of tires for my 2007 Frontier. Capitol Precision Trac are the make. Before I replaced the worn tires my truck never shook and was always smooth no matter the speed. ...
6
votes
2answers
12k views

Oil pan threads stripped?

EDIT Helpful links on how threads got stripped and by who: http://tl.acurazine.com/forums/showthread.php?t=878261 Seems to be a common problem with some shops, where they don't take good care. ...
3
votes
3answers
2k views

2001 Maxima starts but won't stay running

I have a 2001 Nissan Maxima 3.0L V6 that starts no problem but dies almost immediately. If I give it gas as I start it and hold the idle around 1500-2000 for a few seconds, then ease off, it will stay ...
2
votes
1answer
106 views

Coolant leak - 4g63 sohc 2.0L non turbo

Recently I was experiencing coolant leaks in between the engine block and the wheel on the passenger side. This only occurs after the car has been driven aggressively and once the car slightly ...
5
votes
1answer
4k views

How can I diagnose gradual electric power loss in a VW Golf Mk5?

I'm experiencing loss of electrical power to my Mk5 Golf. It seems to happen mostly when the car hasn't been run for two or three days. We changed the battery a few months ago. More recently, there ...
2
votes
1answer
114 views

How extend a drilled hole

How do I extend/make a hole oval? It is in a rectangular beam (6 cm) and needs to be extended 5mm in one direction. When mounting a tow bar, I discovered that some holes in the tow bar are not ...
2
votes
2answers
416 views

What is the best way to determine if my hydraulic motor mounts are bad?

I am experiencing delayed forward movement at take off. I apply the accelerator nothing happens until it jolts forward. When I stop it lunges forward, which leads me to believe it is the motor mounts. ...
1
vote
2answers
277 views

Air-conditioning intermittent failure

I drive a 2007 model Skoda Fabia 1.4Ltr mpl. My air conditioning trips off after driving for 5minute. Hardly stays on during traffic. Fan still rolls but cooling stops. Also noticed it tries staying ...
12
votes
3answers
9k views

How to begin learning engine tuning?

Quite simply, I want to begin tuning and modifying automotive engines for hobby. I have always been fascinated with cars, and I want to become knowledgeable in as many aspects of car tuning as ...
4
votes
3answers
2k views

Removing badly rusted and broken bolt from suspension

I'm stuck trying to replace the rear lower control arms on my 92 Civic. One of the bolts was broken, and while I've now gotten the old arm off by taking a Dremel to the bushing and bolt, part of the ...
2
votes
0answers
119 views

Where is the alarm siren located in a Ford Ka 2010?

I have a Ford Ka 2010 and the alarm siren stopped sounding. The problem doesn't look related to the alarm central unit. The lights still flash and you can hear the relay clicking sound coming from ...
4
votes
2answers
736 views

What does the vacuum hose below the EGR assembly on a 1997 Ford Escort attach to at either end?

I'm trying to figure out what the vacuum hose that attaches to some sort of assembly underneath the EGR on a 1997 Ford Escort with a 2.0 Split Port 2000 engine connects. It is attached to the ...
4
votes
2answers
9k views

Oil leaking from spark plug socket

I have oil leaking from a spark plug socket on my 1981 Volkswagen Rabbit pickup truck. Before you ask, it's swapped with the 1.6 gas motor instead of the 1.6 diesel. The oil leak appears to only be ...
2
votes
1answer
214 views

Negative-grounded vehicles: some switches on positive, some on negative, why?

As far as I can tell, on my van which is negative-grounded, all fuses are somewhere between the positive terminal and the load being protected by the fuse. However, some switches are on the positive, ...
0
votes
1answer
817 views

2007 Rabbit - Intermittently wont start

Vehicle: 2007 VW Rabbit. Auto. 2.5L Problem: The problem started one week ago. When starting car sometimes it will only turn over once and then silence. Solution is to wait a minute or so and then ...
3
votes
1answer
220 views

Are 'voltage stabilizers' a scam?

I have a 2002 Saturn SC2. I was told that adding a voltage stabilizer could improve its performance. Is this true? The units appear to simply be some capacitors hooked up between the battery ...
2
votes
1answer
96 views

Astra G 2.2 - Electrical Issue

I have an Astra G 2.2. It was working just fine, no issues. Recently passed MOT with no advisories or issues. Today I topped up the oil and replaced the overhead interior bulbs with LEDs. They ...
5
votes
5answers
63k views

Is there a way to prop up a window that falls down?

The windows on my car stopped working a few months ago. I could hear the motor running but the wouldn't go back up. Managed to get them closed by putting my hand flat against the window and pushing ...
1
vote
3answers
281 views

Does downshifting ( Engine Braking ) help when my car brakes CAN lock the wheel?

Know facts: When your car brakes (e.g. because of the weight) can't stop the car, it's recommended to use downshift (engine braking) to help brake the car. The best way to stop the car is to brake ...
4
votes
2answers
767 views

I accidentally kept my vehicle Choke ON while riding?

I have Honda Dio 2015 Model. Yesterday, I kept the Choke ON while riding. I wanted to know what are the damages it probably causes to the engine? Does it have any after effects on the engine?
2
votes
1answer
42 views

Derbi Cafe 125 stalling when changing to 1st

I have a Derbi Cafe 125. This morning I started the bike up, let it run for a few minutes, changed from N to 1st, and the bike cut out. This happens repeatedly until I walked to work. I then realized ...
2
votes
1answer
355 views

What is a “confidential vehicle identification” number?

What is the "confidential vehicle identification" number? What cars bear that and where is it located?
3
votes
2answers
781 views

1990 Toyota Pickup 22re fuel injection EFI relay is getting hot

While driving my truck, the engine stopped dead, like it ran out of gas. I used a by-pass wire to go around the EFI and Circuit open relay, the truck ran fine. I noticed a ground wire leading from the ...
2
votes
2answers
2k views

Prius burns off oil very fast. Is this normal?

I replaced the oil on my mom's Prius today, which is 3200 miles or so since I replaced it last. The car only takes 3 quarts of oil, but only drained a little over 2 quarts. My jeep, on the other ...
1
vote
0answers
56 views

Would “one cylinder's out” semantics include a head gasket? [closed]

I sold a car on craigslist with part of the title being "Runs, but one cylinder's out". I had taken the car to Firestone to diagnose why one cylinder wasn't firing right and they said it has 0% ...
4
votes
1answer
8k views

VW Mk4 Golf/GTI airbag indicator warning light

My 2002 VW GTI MkIV recently had the airbag warning indicator light turn on. The VW dealership wanted to charge around $600 to fix it. They told me the seatbelt latch was at fault because it had an ...
2
votes
1answer
453 views

Current from key to solenoid of starter motor relay

I am considering installing a starter motor immobilizing relay inline with the starter setting of the key and starter solenoid. I recently got a MAH-112-C-4 online. It has a 30A switching ...
3
votes
1answer
1k views

Identifying American (Mercury) Mariner outboard

We have Mariner 9.9E outboard motor. Having hard time figuring out year and Yamaha equivalent (early Mariners were Yamahas in disguise). There is very little information on those, and it is hard to ...
3
votes
1answer
1k views

Stiff clutch on Toyota Corolla: can it be adjusted?

I have a 2003 Corolla (mileage ~70K) that drives very well generally, except for one problem: The clutch has always been quite stiff since I purchased it a couple of years ago, and I think it's slowly ...
2
votes
1answer
4k views

How do I fix power window buttons?

The power window buttons in my 2007 Ford F-150 seems to have stopped functioning for the passenger and both rear windows and sometimes my driver window stops working. Since it is happening to three ...
1
vote
2answers
6k views

Misfire the next morning if car runs only for 15 seconds

So I had this gremlin in my wife's BMW 330i for at least 4 years. The car runs great but once in a while you would start it in the morning and the engine would sound rough with some shaking. After few ...
1
vote
1answer
96 views

Which car is this?

Can anybody help me to identify the year, make and model of this car?
3
votes
5answers
1k views

How can I increase the life of my diesel engine when my car does lots of small trips?

What things can I do to increase the life of my diesel engine when I make lots of short trips in the car? My daily routine means that the trip to work goes via another destination which gives my ...
3
votes
3answers
593 views

2003 F150 5.4L V8 Long Term Fuel Trim High Bank 2

I am currently chasing a lean condition in my Ford F150. My fuel trims were reading high on one bank (bank 2) and I am curious when I find the vacuum leak or whatever is causing the high readings, how ...
5
votes
2answers
2k views

What do the numbers on motor oil specifications mean?

What do the numbers and letters in a motor oil specification mean? For example: 0w-30 5w-40 10w-20 Which values are better? Also, sometimes there are additional letters and numbers ...
6
votes
2answers
1k views

Diesel engine starting / first start of the day problems

I’m new to the forum, and no mechanic, so please be kind! Vehicle in question is a 1999 T35 Renault Master 2.5 D. It has had first start issues since I’ve owned it, with white smoke (un-burnt fuel ...
3
votes
2answers
74 views

Tire rotation to fix low tire pressure?

I took my 2010 Civic to the mechanic. He indicated that the tire pressure is low, and suggested rotating my tires as a fix. I thought tire pressure is already pre-specified and should be at a ...
5
votes
1answer
1k views

What are some Seafoam Alternatives

I read this procedure for using Sea Foam ( also listed on their website ) to clean the intake manifold, injectors and crankcase. I think this would be useful for my vehicle, however Sea Foam isn't ...
13
votes
3answers
11k views

Why (almost) all dirt bikes have single cylinder engine?

Every dirt bike i know has a single cylinder engine. I myself ride a Yamaha XT660Z which has a huge 660 cc cylinder. What are the characteristics of those engines? what are the benefits of such ...
3
votes
3answers
568 views

2000 Honda Accord Shakes under acceleration

I have have Honda Accord 2000 with manual 5 gear transmission. During acceleration it shakes like front end is ready to jump out. Engine doesn't misfire or anything - I have plenty of power on all ...
4
votes
1answer
73 views

Why can I not set my Tempomat (cruise-control) to a speed below 30km/h?

Why is it impossible to set a speed below 30 km/h on every Tempomat I've ever seen? Is it for legal reasons or technical difficulties with low speeds? It would be helpful in a stop and go situation.
1
vote
1answer
2k views

Noise when the engine is idle

I would like to know why my car is making noise when the engine is idle, but the noise is silence when I pressed the clutch ?

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