General internal combustion engine questions.

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4
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2answers
400 views

Troubleshooting a Misfire

Car: 2005 Dodge Grand Caravan In the past few days I started to feel the engine stumble. Yesterday the engine light came on and the error was a that cylinder 4 was a misfire (there was also a ...
4
votes
1answer
5k views

Which Reluctor Wheel on LS Engines?

Around 2005 or 2006, GM started using a 58-tooth reluctor wheel, where before they used a 24-tooth wheel in the LSx based engines (LS1, LS2, LS3, etc.). This wheel is used as a way for the computer to ...
4
votes
2answers
176 views

Can I use a CNC machine or waterjet to make an adapter plate to adapt a 5 speed transmission to a rare, obsolete engine?

I am the sad, proud owner of a Nissan SD33T (Diesel), mated to a 4 speed T-19. The power this engine outputs (101HP, 160#/TQ stock) means it struggles on the highway, and I don't want to sacrifice my ...
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 ...
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?
4
votes
1answer
282 views

When I remove a spark plug is it bad news if dirt or grime falls into the engine

Despite my best effort to clean up a corroded spark plug and blowing the area with an airline before removing would it be bad news if dirt or grime falls into the engine in the process of removing it? ...
4
votes
1answer
828 views

09 Camry engine rumbles

This is a pretty straight forward question, but I have an 09 Camry 5-speed manual. It only has about 25k miles on it and has been regularly serviced. However, as of late I've noticed that when I ...
4
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1answer
2k views

Car Stalls When Coming to a Stop

Make: Chevy Model: Cavalier (4 cyl.) Automatic Year: 1993 Miles: 230K Normally my Cavalier drives just fine without problems. However, if I drive for 45+ minutes then it will sputter and stall out ...
4
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2answers
2k views

Engine stalls in hot weather

I have this strange problem with my Nissan Sentra 2002(80K miles). When it is about 90 deg F outside and driven more than about 10 miles the engine seems to miss badly(like for e.g. when you run out ...
4
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2answers
2k views

does a car normally continue moving at a constant speed when in gear and the foot is taken off the accelerator pedal?

I remember when driving a passenger car, when I took my foot off the accelerator pedal completely, but remained in gear, the car would normally continue to move at some low speed, different for each ...
4
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1answer
45 views

Replacing an engine in a Chevy pickup ('85 K10). Is 190hp enough?

My friend is looking to replace the engine in his older Chevy '85 K10 pickup and found this engine http://www.summitracing.com/parts/nal-10067353/overview/year/1985/make/chevrolet/model/k10. Is the ...
4
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2answers
133 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?
4
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3answers
522 views

BMW e36 320i motor looses power significantly out of a sudden

I have a 1992 BMW e36 320i, when i start in the morning, or in cold weather, the cars functions normally and has a lot of power. However, after a little, or when the weather is hot, the car ...
4
votes
3answers
4k views

Slower Engine Start When “Cold”

I have a 2012 Honda Civic EX (4 Cyl Automatic, 5-speed transmission, Regular Gasoline). I get it serviced regularly and it has around 28k miles. The engine light has never come on. I am noticing this ...
4
votes
1answer
1k views

Grinding Sound at Specific RPM/Speed

I have a 2011 Ram 1500. For about a month I thought I was hearing a clunk between 2nd and 3rd gear. I finally decided to listen carefully by turning my radio off. I now certainly notice it, but it is ...
4
votes
1answer
392 views

2001 Pontiac Grand Am SE oil in the coolant

Recently my car started chugging and "vibrating" at low speeds, and the check engine light is flashing on and off. On inspection, I found oil in the coolant. I don't know a lot about cars, but a ...
4
votes
3answers
2k views

Car runs uneven and jerky, but why? (Mazda 626)

I have a Mazda 626 (sedan) -97 and lately its been running uneven and jerky. Have had in in for repairs and changed battery, oil+filter and spark plugs. Still had problems and tried to use a engine ...
4
votes
3answers
17k views

What would cause a car to lose power a few seconds after starting, then run normally?

I start my 2003 Honda Civic each morning and drive to work. A few hundred feet down the road, the engine will sometimes behave as though it is running out of gas and lose power momentarily. It ...
4
votes
2answers
477 views

engine underpowered in idle - what can be done to improve a diesel engine power at low RPM just a bit?

There is an engine which is a bit underpowered when idling, it can not even keep the car moving on a flat road when in gear and idling at 700..800 RPM - see link. What can be done to improve its ...
4
votes
1answer
50 views

E46 engine chirps when idling in the morning

The title pretty much sums it up. If I haven't driven the car in a few days, the BMW E46 engine makes a faint chirp for about 30 seconds when I start up the engine. It's more like a rapid chirp, as ...
4
votes
1answer
89 views

Coolant leaking into engine

I had my truck in for service - 2006 Sierra Denali - due to an oil leak. They replaced the "engine oil cooler lines to pan gasket". Within a couple of days had a major issue - coolant had gotten into ...
4
votes
2answers
3k views

Lugging the Engine (Manual Transmission)

So...lugging the engine obviously isn't something that is good. But why? For example when you feather a clutch to get the car moving, it lugs for a quick moment when you hit the catch point (When ...
4
votes
1answer
139 views

Removing difficult engine bolts

Currenly trying to remove part of the engine mount off my Vauxhall Astra to get to the thermostat and I've hit a stumbling block by two VERY tight screws that are almost impossible to get a wrench on ...
4
votes
2answers
97 views

'93 Ford Ranger 3.0L V6 Engine Only Runs Without Fan

I've recently replaced the belt tension pulley and a little after a week the engine had trouble running. The next day I tried to start it it wouldn't run without constantly pressing on the gas while ...
4
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2answers
862 views

01 sentra running hot

I have an 01 nissan sentra which had been running hot. If i start the car in the morning and turn temp control to hot and fan on and let the car warm up, i will have no heat and the car runs hot. Just ...
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 ...
4
votes
1answer
3k views

Car starts fine after sitting for half a day but has trouble immediately after being driven

I have a ten-year-old car that I don't use too often (it mostly sits in the garage). Last month, I took it for a ride and the engine overheated. I took it to the service station, and the guys there ...
4
votes
1answer
177 views

Random Misfiring - Tried All Basic Fixes - Tech Says Engine Ground

Starting about a week or two ago, my 3.4L engine (2004 Chevy Monte Carlo LS) has thrown a p0300 code, random misfire. Here are the things I've done: Changed spark plugs and wires Knocked fuel ...
4
votes
1answer
637 views

2005 Honda Accord cold start idle is low

I'm not a car expert so I don't know if I'm being alarmist or not but this problem just started happening the past week and seems to be getting worse fast. Hopefully the terms I'm using is helpful in ...
4
votes
1answer
685 views

Engine suddenly died on uphill, then went back to life after a few tries

Car: BMW 318 TDS Compact. 90HP. 168.000KM Situation: was driving a very intense uphill section at 70km/h, in 4th gear (2.000 rpm). Everything was ok. Engine sound, temperature, etc... Suddenly, ...
4
votes
2answers
132 views

vanagon lurches forward, won't accelerate past 20mph or so

I have a manual 1982 diesel VW Vanagon with a 1996 Passat TDI engine in it. This morning (low 40s temp), accelerating up a hill, heard a hissing sound in left rear. Check tires, no problems. Able ...
4
votes
1answer
459 views

Astra Turbo sounding like a diesel

http://www.youtube.com/watch?v=ph6JOhFJcJA The video above demonstrates the sound I hear when my car is at operating temperature. I don't know why it would sound so rough. It doesn't sound quite as ...
4
votes
1answer
1k views

High pitch whistle at a very particular throttle level

The symptom: while accelerating, at a very particular throttle level/pedal angle my engine recently started whistling in a very high pitch. If I let go of the gas or push it in more the sound goes ...
4
votes
1answer
1k views

'98 Camry has occasional rough running / low speed idle problem

My '98 Camry (with the four-cylinder engine) usually starts, idles and drives like a dream. About a year ago I had the entire exhaust system replaced (including cat) due to corrosion. Since then it's ...
4
votes
1answer
486 views

Misfiring Engine Hyundai Accent Executive

My Hyundai Accent Executive is 2001 model. Recently the engine started misfiring badly during idling with Air conditioner on. It is almost like the engine is going to turn off any moment. The ...
4
votes
1answer
2k views

How to clean the MAF sensor on a 1997 Nissan Altima?

I have a 1997 Nissan Altima sedan. I’ve been told the issues I’m having with my car is from the mass air flow sensor. I was wondering how to clean/repair this sensor and contact points the best? What ...
3
votes
5answers
3k 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
3answers
146 views

What good is it for an engine to have lower CCs and higher BHP?

I was watching "The Perfect Road Trip 2" by Top Gear, where at some point Richard Hammond is driving a Mercedes A45 AMG. He says that the car develops a whooping 355 BHP, and all that comes from a ...
3
votes
3answers
7k views

Engine power specification at different rpm?

Car companies advertise power of an engine at different rpms. Car 1: 80 PS at 6000 rpm Car 2: 85 PS at 6500 rpm What does the power at different rpm mean? Does it mean Car 1 has better power than ...
3
votes
2answers
101 views

Top Dead Centre

I replaced a cylinder head gasket on my 1993 Holden Apollo (Same engine as the toyota camry 5S-FE). However when I went to get TDC I think I may have forgotten to put the car in Neutral. Could this ...
3
votes
2answers
3k views

BMW E30 M20 oil warning light goes on on hot days but the motor sounds and performs fine

The car: BMW '90 E30 320i Cabrio with the six-cylinder M20 engine. The problem: the red engine oil warning light inside the instrument cluster (not the check control) lights up after some driving. ...
3
votes
3answers
108 views

What are some typical maintenance things that every owner should do regularily?

Right now I just get a car wash every month, and my oil changed and whatever is included in that. Usually just a quick "inspection". Is there anything else I should be doing for my car? Or also, is ...
3
votes
3answers
132 views

do all quattros have shafts connecting front and rear axles

I have recently purchased a 2009 Audi A5 Quattro, and in looking underneath the car there does seem to be a place for a shaft to connect the front axle to the rear axle (which you would expect) but ...
3
votes
1answer
97 views

Which engine part is this?

I own a speedboat that is powered by a 5 liter V8 Mercruiser with 200bhp. Yesterday when trying it out for the 1st time this season, 2 things happened: 1 - the boat was always trying to turn left ...
3
votes
3answers
153 views

What kind of gasoline additives will help maintain the engine efficiency/life?

Aside from the traditional maintenance of oil changes, and keeping fluid levels correct - what else will help prolong the engine's life? I recall a few years back gasoline additives were the thing to ...
3
votes
2answers
3k views

Motorcycle popping on acceleration

I have a 1975 Honda XL250 that I bought earlier this summer. Up until recently its been running great. It was leaking a little gas, but nothing too serious. When it started to get worse, I opened up ...
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 ...
3
votes
3answers
580 views

Can I use high temp RTV instead of a gasket?

I read somewhere that I can use RTV silicone instead of a regular rubber gasket as an engine seal. Is this feasible?
3
votes
2answers
882 views

Why does a car's engine vibrate at start, despite the circular geometry of its component's dynamics

If a well balanced system starts moving, it should not vibrate ! Or if it does, it should vibrate even more at high speeds ! But a car clearly vibrates hard during the startup, to then stabilize.
3
votes
1answer
194 views

2001 Audi A4 corroded part… What is it?

I noticed under my hood that a piece looks corroded through. My car hasn't given any warnings or check engine lights and no liquid is coming through. No one I ask knows what it is. Please help! ...