Internal Combustion Engine. Most engines in road going vehicles are 4-cycle internal combustion gasoline engines.

learn more… | top users | synonyms

1
vote
0answers
19 views

Multiple misfire on a 1998 Infinity Code

I bought a 1998 Infinity, and it has been running poorly, with a poor gas usage. I went and had a parts store run the computer, It gave me the code Multiple miss fire, along with Knock sensor, Evap ...
1
vote
0answers
36 views

BMW 520d e60 2008 diesel engine won't start after switching off

I have a strange behaviour of my car. Engine starts well at any weather condition but after driving and switched off engine cannot start again for 20 - 40 minutes. After this time it starts like ...
4
votes
12answers
18k views

What can I do to give my lawn mower more power?

I have a 21" Craftsman push lawn mower with a Briggs and Stratton 7 hp engine that is about 6 years old. I've got it cutting on the highest setting, and it still has issues cutting the grass without ...
4
votes
1answer
35 views

Stuck valve, loss of pressure. Risky or only poor performance?

I have a 1998 Toyota Tacoma 2.7L 4cyl with 202,000. The engine has been running rough and will occasionally sputter and die when I let off the gas pedal. I had it diagnosed and they think it's a ...
7
votes
3answers
17k views

What is a rod knock?

What is a rod knock? What causes a rod knock, how bad is a knocking rod, and how can I tell if a rod is knocking?
4
votes
1answer
73 views

Triumph America 2002 running lean on one cylinder

I have a problem with my America 800 it's running lean on the right cylinder and when I adjust the mixture screw it makes no difference. The mixture was checked using an afr meter. The rubbers ...
0
votes
1answer
23 views
7
votes
1answer
105 views

Warm fuel injected engine stutters when accelerating

I have a 1994 Honda Concerto 1.5l gasoline car, fuel injected. When the engine is cold there are no accleration problems. But once it warms up it stutters if I step hard on the gas. When it does ...
2
votes
0answers
33 views

2007 Nissan Quest RPM issues

I have a 2007 Nissan Quest 3.5S. I notice that exactly at 20mph the rpm will be at a specific rpm then fluctuate to a higher rpm then come back down to normal rpm. Is this normal?
3
votes
0answers
34 views

1st and 2nd cylinder not combusting in dual carburetor'red setup

So I have a Maruti Esteem engine with a dual carburetor on an engine dyno and everything was already installed when I joined this lab. We seem to have a problem when trying to fire the engine. 1st and ...
1
vote
0answers
29 views

I need to replace an engine in my heritage

My 2002 heritage has over 48,000 miles on it and is making a lot of noise so I would like to replace it with a 2003 road king motor. Would it line up and bolt in without any trouble.
9
votes
1answer
58 views

Wankel Engines - Port Tuning

Port Tuning Wankel Engines In many ways, a wankel engine is like a two-stroke engine. You can open up the ports to change the timing regarding exhaust and intake. I've ground many an intake, ...
15
votes
3answers
35k views

What exactly is a “burnt valve” and what causes it?

I've come across this term a couple of times in the context of diagnosing engine-related issues, but don't know what it refers to. Here is an example from an automotive forum I frequent: I gotta ...
18
votes
6answers
33k views

Is it OK to mix oil of different viscosity in a Wankel engine?

I have a Mazda RX-8 (with a Wankel rotary engine). Mazda advises North American owners to use 5W-20 oil. The engine was just replaced 200 miles ago by the dealer so it currently has 5W-20 in it. ...
7
votes
1answer
127 views

Short shifting after full throttle

Other than normal wear and tear, are there any detrimental effects or added harm done to the engine by going full throttle in 1st and/or 2nd gear, then shifting up well before redline (say 4k rpm on a ...
1
vote
1answer
36 views

89 Pontiac Trans Am GTA Stalls No Start

A friends 89 Trans Am with a 5.7 (L98) PFI stalls and will crank, but not restart until the car sits for a few minutes. I haven't actually looked at it yet. I'm guessing something is getting heat ...
8
votes
5answers
13k views

Why can some cars go through water while others can't?

Why can some cars (mostly old Russian cars on YouTube) seemingly go through water while others can't? I'm talking about situations when the water level is at half the height of the car, so the engine ...
3
votes
2answers
49 views

2006 Audi A4 2.0

I am in the process of increasing horsepower with more boost in my turbo. What's the max boost I can do if I did the k&n air filter upgrade and put a 2.5 down pipe and 2.5 inch exhaust all the way ...
0
votes
0answers
19 views

Motorcycle bore and stroke [duplicate]

Manufacturers often detail bore and stroke in their promotional material and claim 'achieving the ideal compression ratio' How do different bore / stroke / compression ratios affect an engine's ...
5
votes
1answer
88 views

Car is shaking, feels like the car doesn't have as much power, gear knob also shaking and exhaust smells of fuel (and was louder than usual)

Okay so the car is a Nissan 200SX S15 and as i'm relatively new to the manual transmission I wanted to practice hill starting (which is where I screwed up). I pretty much let go of the clutch way too ...
0
votes
0answers
19 views

Excess oil in car engine [duplicate]

Mechanic changd the oil filter forgot to drain the old oil and continued to add the new oil So basically the engine has double the capacity of oil Will this caise damage to the engine
3
votes
3answers
73 views

EFI engine car failed Emission test?

i have an EFI engine car (Nissan N16 Super Saloon - 2000yr) i bought it 6monthes ago as an used car. After i bought it, i had check engine lights on, then i drove it to a mechanical shop few times ...
1
vote
3answers
14k views

Best Ways to Pass Emissions?

I recently bought a 1989 Mercedes 300E that didn't run. Has a straight-six gas engine. Thanks to the miracle of Seafoam and a lot of luck, I was able to get fuel delivery happening again. I then ...
3
votes
2answers
105 views

Motorcycle bogs down under load

I recently did a head gasket repair on my 1986 Kawasaki GPZ1000RX and now that everything is back together it starts up fine, idles fine, and revs high without a problem while in neutral, but when I ...
6
votes
4answers
2k views

Why are most engines made with even numbers of cylinders?

Why are most engines made with even numbers of cylinders? Are odd numbers of cylinders somehow less efficient than even ones?
4
votes
1answer
329 views

2011 Jeep Liberty ran without oil, did this cause my engine to blow?

I have a 2011 Jeep Liberty and the oil pan rusted out and it was driven for a while without oil. The oil pan was fixed a couple days later. This happened in April 2014, in Oct 2014 the engine started ...
1
vote
1answer
32 views

Lawn tractor won't start

Not sure if this is the right stack exchange forum to post this in or not, hoping it is... I have a Toro lawn tractor which is having issues starting. I have been using it fine for the last few weeks ...
3
votes
1answer
46 views

Is a greasy exterior a sign of bad maintenance?

All car's I've had (second hand and between 15-30 years old) have always had a greasy veil over engine components. I understand moving components need to be lubricated but this gives off the ...
2
votes
1answer
24 views

2004 Volvo S60 starting issue

I am interested in buying a 2004 Volvo S60. The guy selling the car says: "It won't start. When you try to start it. its as if the battery was bad, but it's not" Does anyone know what that means? ...
5
votes
2answers
3k views

Effects of driving through deep water WITHOUT hydrolocking (car still bogged down and died)

So, yesterday we had very heavy rains, and unfortunately I was driving in an unfamiliar area of town. I drove through high water, which caused my car to sputter and so I turned around. The car behaved ...
5
votes
3answers
26k views

Burning smell and faint white smoke

I have a 1999 Audi A4. Recently there is a burning smell when driving that is noticeable when stopped after driving. At night I noticed a faint white smoke blowing out of the front in the headlights. ...
4
votes
0answers
76 views

Car turns off when travelling at high speed

I usually keep a speed of 150-160 km/h (93-99mph) on the highway without any problems whatsoever. However, yesterday I decided to go up to 170 km/h (106mph) and the engine doing around 4600 rpm, when ...
6
votes
3answers
1k views

Estimate for head removal / reinstall

In changing the spark plugs in my 2000 Ford Mustang GT (4.6L), I sheared one of them (number 3) The ceramic is totally removed, as is the hex nut. The threaded portion as well as the ground electrode ...
2
votes
1answer
21 views

1999 Chevy Suburban Sluggish Start

My Suburban started doing something odd on starting before, but I'm not completely sure how to describe its behavior. It get's past the battery part fine when it's starting, and the starter motor is ...
1
vote
0answers
27 views

Cause of greasy gunk accumulation under exhaust headers

When examining my engine bay earlier, I noticed a large amount of black gunk built up on the bottom part of the engine under the exhaust headers. I removed the exhaust header heat shield and found ...
0
votes
0answers
17 views

1999 Jeep Cherokee 4.0L engine

Where can I get a wiring diagram for a 1999 jeep cherokee? I am having problems with a couple fuses blowing in the power distribution center under the hood and it causes the check gauges and check ...
0
votes
1answer
29 views

very low speed in fact no pick up at all and lot of vibration of my ford fiesta diesel

I don't know how to maintain a Ford Fiesta diesel car's engine which has lot of noise with no pick up and power steering oil leakage. My car has lot of problems like pick up, speed, mileage, rattling ...
3
votes
0answers
26 views

Mitsubishi Eclipse dies while driving, then won't stay on after cranking back up

I drive a 2001 Mitsubishi Eclipse RS 4 cyl. It has a replaced engine from a Galant. The car has started dying on me seemingly randomly - I haven't seen a pattern in the fuel level, time of day, speed ...
2
votes
2answers
104 views

Jet ski maintainance

I have two old jet skis, one of which isn't working too well anymore. I'd like to learn how to fix it. I'd probably not be able to sell it for very much anyways. Are there any good books or resources ...
1
vote
0answers
15 views

Peugeot 207 gti depollution fault

Car starts rough but runs fine ,no loss of power. check engine light on and depollution system faulty on dash. Local garage scanned car and came up with camshaft sensor fault but they think timing ...
2
votes
4answers
92 views

Check engine lights came up after Air filter change?

Yesterday I changed air filters in my car (Nissan supper saloon N16 - model year 2000). After installation the check engine light came on when I started the engine and the engine seemed to be running ...
2
votes
2answers
5k 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 ...
6
votes
1answer
119 views

No power at higher RPM

I just had to do some fixes on my 1993 Kawasaki ZR750. I had some rust in the tank so I got it cleaned and sealed. To be thorough I also checked the rest of the system. Here's what I did: ...
4
votes
1answer
59 views

Why does my car cut off the first time I try to start it?

I'm trying to figure the problem with my 2004 Nissan Skyline I purchased about a year ago. Every time I start my car it cuts right off and for it to stay on I have to press the gas pedal in order to ...
0
votes
2answers
45 views

Safe Vehicle Operating Temperature while towing

I have a F-350 Dually that is capable of towing 16,000lbs. I regularly pull 14-15K lbs. I have a programmer that gives me a digital display of both my EOT and my ECT. What would you say is the ...
5
votes
4answers
13k 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, ...
13
votes
3answers
291 views

Why does GM still insist on push rod engines?

GM continues to design and produce push rod (Over Head Valve or OHV) engines while most of their competitors have gone to over head cam (OHC) configurations for their performance engines. Is there a ...
4
votes
3answers
4k views

Lots of oil in radiator, but no coolant in oil and oil is not low

Theres oil in the radiator and the overflow tank of my 2002 GMC Envoy. The oil is fine, and has no water in it. The SUV gets regular oil changes, and the oil presure is fine. Water temperature is ...
5
votes
1answer
574 views

Jerks on 2nd gear at low speed

My car jerks on second gear when I slow down while on second gear and then want to accelerate back. After changing the plugs and air filter it got a bit better but after driving 500+ miles it is back ...
2
votes
3answers
1k views

Manual engine has no power in third fourth and fifth gear when driving up an incline.

When my engine is in neutral it reaches red line with no problem. It also has power in first and second gear. The problem happens when i am driving up a long incline, I will be in third or fourth ...