General internal combustion engine questions.

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2
votes
2answers
38 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?
3
votes
2answers
247 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 ...
1
vote
0answers
23 views

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

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% ...
3
votes
1answer
821 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
3answers
24 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 ...
8
votes
3answers
973 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 ...
1
vote
1answer
56 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 ?
0
votes
0answers
23 views

aerodynamics and engine revamp [on hold]

Totally new to this. Would appreciate help in gaining knowledge about working of engines.if anyone could suggest a couple of books for me to start. crazy about f1 and would like to know about how aero ...
2
votes
0answers
16 views

honda xr650l first ride after winterization

Before winter I had the oil changed, filled the gas tank and added the recommended amount of stabil fuel stabilizer. Then rode around for about ten minutes then switched the petcock to off and ran the ...
3
votes
0answers
34 views

newly rebuilt engine, long warm-up & severe shaking

I have a 2002 Toyota Celica GT with a newly rebuilt engine (ran out of oil and threw rods) but problems still persist. I was told by the mechanic to allow myself a 500 mile break in time of not ...
0
votes
0answers
10 views

Non-start condition with my Honda civic lx 1992

I am having a problem with my car. It turns over but doesn't start. I put a new main relay, a new battery, a new fuel pump, and a new distrubtor. When I have the key on number 2 and let it sit on for ...
1
vote
1answer
95 views

my car acts like its going to stall at a stop

my car drives fine but when i come to a stop light or any stop it acts like it will stall but never does. did some easy things like oil change. no check engine light is on but it seems to keep ...
5
votes
1answer
42 views

What is the Carter Gas Filter for?

I'm confused with this, are there any combustion gasses in the carter and why do they need to be filtered? What is the Carter gas filter, where is it located and what is its use? Is there a way to ...
3
votes
2answers
773 views

2013 Yamaha XT250 engine clicking/ticking noise

I just bought my xt250 as my first bike after getting my permit about a month ago. It's 2013. At 100 miles I dropped the oil and changed the filter. As a small woman I've also installed lower links to ...
2
votes
1answer
1k views

Car sputtering and stalling when idle and going into first gear

My 2005 Honda accord is starting to sputter and stall. It started all of a sudden one day and figured it might be my oil so I had it changed since it was time anyway. That seemed to work fine there ...
3
votes
0answers
30 views

Oil pressure decresases when I step on the gas

I have a 1982 Mercedes W123 with a 2L gas engine. I have noticed some weirdness with the oil pressure and want to know if this is an indication of a problem. Let's say I am driving at 60km/h and the ...
3
votes
0answers
41 views

Semi synthetic oil engine break-in

I've finished rebuilding the engine of my motorcycle (4 stroke 650cc single-cylinder). For now it runned only once varying between 1000 and 2000 RPM for 5 minutes with a couple of short bursts after ...
1
vote
1answer
27 views

2005 Honda Civic - Oveheating

So my car has been overheating for over 1 year. It overheated during summer or when I went 80mph only. I recently saved up enough money to get the car fixed. I brought it to my mechanic and informed ...
4
votes
2answers
132 views

Royal Enfield Classic 350 - Motor Break-in Best Practice

How many km's should be driven with a lower speed to setup the bore for a Royal Enfield Classic 350, what is the minimum speed for that duration and how many km's should we maintain that lower speed?
1
vote
2answers
56 views

Engine hesitates and sometimes stalls after filling gas tank

On my car (2005 Dodge Grand Caravan) when I fill up my gas tank, almost immediately afterwards pulling out of the gas station my van sputters, misses, hesitates, call it what you will. The past couple ...
4
votes
2answers
3k views

Host of small performance problems in 2006 Hyundai Elantra

I bought a used 2006 Hyundai Elantra (Automatic) back in early 2011. At the time, I was needed to have a car quick, and it seemed like a good deal, but the longer that I've owned it, the more problems ...
0
votes
1answer
125 views

96 Toyota Camry won't stay started

My 96 Camry starts first time every time then stalls after 10-20 seconds? Last year it ran fine but rarely would stall @ running speed. I had to set for 2-3min before it would start then it ran ...
2
votes
1answer
318 views

Having difficulty starting car in the morning/first start after a while

I've got a pretty old car (Nissan Pulsar J1J 1991 auto, 203K kms on odometer) and it drives pretty well - I'm using in on a roadtrip across New Zealand and have taken it on pretty mountainous terrain ...
2
votes
1answer
52 views

What are reasons my engine would sputter when turning off?

I have Subaru Impreza 2.5i (2.5 NA). My car's engine sputters a bit when turning it off. Specifically it seems like the cars engine keeps turning for a little longer right after I remove the keys. ...
4
votes
3answers
1k views

What does it take for a modern muscle car to sound like a classic muscle car?

To preface, I would grade my exhaust knowledge with a "B-". I know what the major components are and what they do, but I don't know if and when certain exhaust parts became mandated or introduced ...
5
votes
1answer
53 views

Leftover parts after head gasket change; are they engine mounts or braces?

About a year ago, I replaced a head gasket on a 1994 Chevy Cavalier 2.2L. After I put everything back together there were two parts left over. The car runs good considering it's 20 years old, however ...
3
votes
1answer
311 views

Brake Specific Fuel Consumption of 2-stroke vs 4-stroke

How much fuel do various types of engines burn per power output? I'm especially interested in naturally aspirated piston engines, and comparing two-stroke to four-stroke. The wikipedia article gives ...
1
vote
0answers
21 views

Old Air Compressor Rebuild (and general piston engines) - Oil On Cylinder Walls?

So I have recently acquired (for free) a circa 1973 Speedaire 20 gallon compressor with no history. After a short while of use the check valve failed and when I removed it I noticed it and the air ...
5
votes
3answers
2k views

What happens when you run out of fuel?

My question is specific to diesel or gasoline (petrol) engines. Many people told me that it is very bad to run out of diesel since it can damage the engine and it's difficult to re-engage it ...
0
votes
3answers
161 views

Derbi Senda 50cc won't run correctly?

I have a Derbi Senda SM 50 2005 plate. It has a good spark, however, it's not reading any compression. It's had a new top end and gaskets! What could be wrong? Sometimes it starts when you bump start ...
0
votes
2answers
49 views

Sludge in the radiator

I have a 08 Kia Rio 5. A mechanic recently rebuild the engine, replaced water pump, changed timing belts etc etc, but now it's leaking oil - not just that, I also found sludge in the radiator and ...
22
votes
9answers
27k views

Is it necessary to 'burn in' or 'break in' a new car?

I've just bough a new 2011 plate car. I've heard stories of people 'burning in' engines for the first few hundred or couple thousand miles using methods such as: Not driving above 50 mph. Varying ...
6
votes
4answers
1k views

What happens if unsuitable oil is used in a vehicle engine?

I recently heard an urban legend-like story about a guy in a developing country who decided engine oil was too expensive and so used some vegetable oil instead. The story says the car ran for some ...
2
votes
0answers
24 views

Typical voltage drop when air con, radio, lights, etc. in use

Imagine the engine/alternator are running and the battery voltage is 14V. If I now turn on the air conditioner, radio, headlights, seat warmer, cigarette lighter, should I now expect the voltage to ...
4
votes
1answer
4k views

OHV vs. OHC: which is faster in speed, horse power?

What are the main differences in OHC and OHV engine designs, and which is faster or more powerful? Also, which is more reliable?
1
vote
1answer
90 views

Saab 93 Automatic died when waiting for traffic light and won't start again

I just bought a 2006 Saab 93 Aero 2.0T automatic in October, 72000 miles. Everything seems perfect. But 2 weeks ago, the engine died while I was waiting for red light in the town centre, I just braked ...
10
votes
1answer
161 views

Changing Firing Order in a 4 Cylinder Car

Backstory In motorcycling you can get cams that change the firing order and time from a traditional 1,3,4,2. It's was very common in American roadracing in the 1990's to hear 4 Cylinder engines that ...
2
votes
0answers
26 views

Will a 95 4AFE engine work on Euro 4 gasoline?

I am hearing news in our country that they might upgrade our fuel from EURO 2 gasoline to EURO 4. I am worried that it might damage the engine on my 95 corolla, which I still plan on keeping for at ...
6
votes
3answers
406 views

Trying to figure out the name of this car part!

I got new tires today and saw that the part that's circled is broken on my car. It looks like it just snapped at the top because part of the bolt appears to still be in whatever the tube is. Anyone ...
4
votes
3answers
2k views

Polo TDI 2004 - intermittent power, smoke, turbo issue

Car: Polo TDI 2004 1.4 with 190,000 km (118,060 miles) on the clock. While Issue: driving it intermittently (distance/time are not factors it seems) it starts to spew black/dark grey smoke and all ...
2
votes
2answers
39 views

Engine doesn't want to stop

I have a '59 Nash Met. with a straight 4. It runs great, but when I turn it off the engine continues to run for up to a minute, sometimes violently shaking as it comes to a halt. Any idea what causes ...
0
votes
1answer
22 views

weather causing power loss

Why would my engine lose power when the weather temperature gets warmer. While driving the vehicle will not have as much power when it gets warm or hot.
4
votes
2answers
1k views

Add 2 stroke oil to a 4 stroke petrol engine during burn-in period

I'm planning to get a new petrol (gasoline) car soon. A friend of mine, who worked as a motorbike mechanic when he was young, told me he puts a small quantity (125 ml / 4 oz) of 2 stroke oil in the ...
3
votes
1answer
44 views

Overheating & boiling in the overflow tank

I have had the gases checked in my overflow tank (which boils short distances) and also over heats. Two different mechanics tested the gases and said it's not the head gasket but yet it still boils ...
1
vote
1answer
45 views

2006 Volvo s40 started smoking suddenly

Had my car serviced two weeks ago fuel consumption and great and been driving smoothly. Yesterday driving from work it suddenly started smoking terribly. Stop at the gas station checked the oil and it ...
4
votes
1answer
304 views

2015 STI White smoke

My 2015 Subaru WRX Sti is emitting white smoke from the exhaust. The smoke smells like burning electronics. When I pull over and open up the hood, I also see white smoke in the engine bay. The smoke ...
5
votes
5answers
7k views

How reliable is a second-hand Subaru 2.5 RS 04-05?

Basically, I've been a Subaru enthusiast for a few years but never been able to purchase one because I'm still a student. However, this summer I will be able to. The issue is that I need a reliable ...
5
votes
4answers
5k views

Car dying at low RPM only after filling up with gas

My question is closely related to one about a Jag dying at low RPM, but is slightly different because it only occurs after refueling and because the problem persists after cleaning the throttle body, ...
3
votes
0answers
30 views

Rebuild for longevity

So, I have a question about a 98 2.0 rt neon. I am going to get a top/bottom rebuild on it, the block has 260000 km on it. I have seen rebuild kits on the market anywhere from 300 dollars (ebay ...
4
votes
2answers
691 views

Dealership Installed “Oversized” Oil Drain Plug As Solution

In this question, we discuss stripped oil pan threads. I learned it is a result of user error - over tightening and cross threading, by the dealership I consistently go to. Many people have come ...