General internal combustion engine questions.

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5
votes
2answers
745 views

Should bore my cylinder or just hone them?

I'm in the process of rebuilding the 5.4L engine out of my 1999 Ford F250. I'm going to replace the pistons (and rings) because the black (teflon?) coating on the piston skirts is worn off and there ...
1
vote
2answers
758 views

Should I replace a “blown” engine on my John Deere mower?

I have a 2005 John Deere 115 19 HP automatic riding mower. After leaving it in the garage all winter, I started the mower, drove it about 50 yards, and engaged the blade. It went about 20 feet, made a ...
3
votes
1answer
62 views

Jeep Grand Cherokee redlines after engine overhaul

I just replaced pistons, lifters, pushrods, and head on a 1999 Jeep Grand Cherokee. It started right up, but the RPM went to redline. I checked throttle body components, the linkages are OK, but the ...
6
votes
4answers
1k views

Engine oil change and getting rid of old oil completely

After running the vehicle for a certain distance usually we will change the engine oil. This will not only give engine new life with the brand new oil but will also get sludge and other sediments out ...
1
vote
1answer
96 views

How can I identify which cylinder is responsible for a petrol engine misfire?

My petrol engine has developed a persistent misfire. How can I figure out which cylinder is the culprit in order to hone in on the root cause?
1
vote
2answers
154 views

I have an issue with Stepping on gas and no increase in speed

It only happens rarely.. but sometimes when stepping down the gas it would suddenly max out the speed gauge, and you hear the very loud engine noise as if i stepped down the gas all the way, but what ...
1
vote
1answer
49 views

How are the engines of street cars different from trucks and performance cars?

Consider three cars. All three cars have different engines, but all engines are 3 lit. V6s. The engine in first car is made for great gas mileage. The engine in second car is made to be able to tow ...
3
votes
1answer
2k 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 ...
-1
votes
1answer
46 views

engine noise on a carburated 327 chevy engine

What does it mean when i rev my engine up to about 4500-5000 rpms and it squeals could it be my serpentine belt
0
votes
0answers
23 views

1989 nissan pintara

What could make my pintara die whilst driving it. I got it to start again twice to get it home but both times it died without warning and now it won't start at all. It turns over but seems to have no ...
4
votes
1answer
104 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 ...
3
votes
1answer
283 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 ...
1
vote
1answer
47 views

Which operations are done when key is turn to On position?

I would like to know which operations or functions do the car when I turn de key to On position (the key positions before start the engine) in gas engine and in diesel engine. For example, in a ...
3
votes
2answers
125 views

Seized engine on 13 yo Infiniti, out to pasture for 1 yr. Donate for scrap or worth a revisit?

We live in the temperate Northern California foothills, and lo these many months ago, my wife took my father's 2001 Infinity up the Reno mountain pass without seeing (or checking) the dangerously low ...
1
vote
1answer
162 views

Hyundai Tucson Diesel 2.0 2008 - Difficulty Starting

Hyundai Tucson Diesel 2.0 2008 and takes at least 4-5 attempts to start before it idles badly for about 10 seconds and then is fine. Doesn't die at the traffic lights, no problems at all otherwise. ...
2
votes
2answers
705 views

What is that knocking sound my engine makes when the revs drop too low?

I have a 2013 Subaru Impreza with a 2.0 liter engine and a manual transmission, and when I let out the clutch too fast while in reverse or 1st, sometimes the engine RPM will drop so low that it makes ...
1
vote
1answer
136 views

Engine hesitates when accelerating - 1996 Sunfire

I have a 1996 Pontiac Sunfire with the 2.2L engine. When I accelerate slowly the engine seems to run fine. However, if I accelerate quickly the engine seems to hesitate. I have already replaced the ...
2
votes
1answer
503 views

2003 Honda Civic 1.7 vTec - White Smoke from the tailpipe

I have a Honda Civic 2003 gx 1.7 liter vTec stick shift 4 cylinder. Just today I had to put oil in my car. Drove for about 5 minutes got to a light and when I shifted into first gear a white cloud of ...
2
votes
2answers
824 views

Formula for calculating output power after putting a rpm reduction gear

I'm thinking of starting of converting an old car to an electric car. I have a question, but google won't answer me my very long not very well explained question. Take this scenario. I would take a ...
2
votes
0answers
96 views

2004 Chevy Malibu Classic Acceleration & starting problems

I was riding along and my 2004 Chevy Malibu Classic stopped accelerating. I was pressing the gas but it wouldn't go any faster. I coasted off the highway and turned it off, then I started it back up ...
2
votes
2answers
531 views

Squeaking under the hood only while throttle is pressed

My 2001 F150 with 255xxx miles has a squeaking under the hood. It is only present while the throttle is pressed while driving. It is loud enough to be heard in the cab, but not over the radio. It ...
1
vote
1answer
85 views

1981 amc concord won't start

I have a 81 amc concord. I drove it and it died and went to start it again there was nothing. Replace starter battery and starter relay. There is no headlights no buzzer no radio no dome light. Any ...
4
votes
2answers
171 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 ...
-1
votes
2answers
137 views

The disadvantages of mitsubishi lancer 2007 [duplicate]

I am planing to buy a new car that has to be good enough to be used everyday . I have tried the speranza and the brilliance but weren't good and not reliable to be used everyday . Many friends ...
3
votes
3answers
129 views

97 Honda Civic dies in neutral

I have a 97 Honda Civic that will occasionally die in neutral. This is what I have done so far: Replace both O2 sensors Replace MAP sensor Replace Air filter Added Lucas treatment to fuel tank ...
4
votes
3answers
379 views

Why are drive by wire systems so unresponsive?

Purchased a honda Fit seeing their reasonable price and good engine power. However I have a lag between me pushing the pedal and the engine responding. I constantly have to downshift to get any power ...
3
votes
2answers
252 views

Mini Cooper P1638 code

I have a 2007 Mini Cooper. It keeps throwing code P1638 on my code reader on these really really cold mornings, and the engine seems to search for idle, reving betwween 500RPM and 1400RPM. The car ...
3
votes
1answer
389 views

Should I run my generator dry in preparation for storage?

I think this is on-topic after reading the FAQ, so I figured I'd go ahead and ask. I gave my gas generator its scheduled 3-month interval "workout" last night, and after letting it run for about 30 ...
2
votes
4answers
1k views

Is starting idle RPM always lower in colder temperatures?

I've noticed that my 2008 Jetta 2.5L 5W40 generally starts up with an idle RPM of at most 1.2K RPM around the freezing temperature (say when the temp sensor reads 33°F), or even at just about 1K ...
3
votes
2answers
2k views

My battery was too low, and now my check engine light is on

I've noticed it in the last year (2013) that my 2008 Jetta with the original OEM battery would be taking a little longer to start than before, sometimes (but very rarely) not starting in the amount of ...
3
votes
1answer
81 views

How to reach bolt at the rear of BMW M41 Engine?

I can't manage to properly reach the top right screw (zoom picture of it on the second picture). How could I do that ? (the tool I have is too long to be able to go on the rear, there is nearly no ...
3
votes
2answers
274 views

Going more than recommended Speed in Break-in Period

I have a new Yamaha motorbike. Seller told me not to ride speed more than 50 Kmph for first 1000KM but I rode it 60 for 10 - 15 minutes due to some reason. How does it affect to my Motorbike ?.
0
votes
0answers
49 views

Remove dark layer of particles stuck in Diesel engine tubes?

My BMW E36 M41 engine seems to have a dark dust in the small tube that goes out from the EGR valve. (the other tube contains a sort of dark liquid...) Is it advised to cleanup that dark matter ...
1
vote
2answers
66 views

Can a variable engine exist?

I have really no knowledge about mechanics but such a curious guy. Excuse my Ignorance. Does a variable engine exist? Like as the vehicle slows down the engine will slow down and when the vehicle ...
4
votes
1answer
427 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, ...
5
votes
2answers
96 views

How to work on engine out of car?

I'm currently doing an engine swap on on 97 Corolla Levin, need to swap over the exhaust manifold, water pump etc from one engine to the other, but not sure what the best way to handle the engine ...
3
votes
2answers
203 views

What will happen if there is something else also with petrol in car

Today someone broke my car fuel outer case and taken out fuel. I came home by driving but then i have now one doubt in my mind. What if he put something else in tank like water, sand, etc in there. ...
1
vote
1answer
90 views

How to spot remove high temp engine paint?

I've recently painted an engine post reassembly, due to cost reasons. No doubt I've encountered overspray on certain parts. I know sandblasting the engine proper is a huge no-no, and soda blasting ...
2
votes
1answer
59 views

Engine Whine Problem

I have a 2000 Ford Explorer V6 4.0, manual. I bought it brand new and have put just over 175,000 miles on it. I was driving down a dirt road to my home and noticed what sounded almost like a hissing ...
2
votes
1answer
2k views

How much does displacement affect performance?

I'm interested in learning more about the steps that can be taken to increase the performance of an engine. I'm curious how much displacement affects performance. For example, compare the following ...
1
vote
1answer
102 views

Engine swap considerations

I'm interested in restoring an old car that has a relatively underpowered engine. I'm curious how difficult it would be to replace it with a different (cheaper, more common, more powerful) engine. ...
2
votes
2answers
120 views

What does CC refer to when describing an engine?

I have been learning about various older cars on Wikipedia. I've always wondered what the "cc" refers to in the engine description. For example: 1964–1969 Porsche 911: 1991 cc 1965-1969 Porsche 912: ...
4
votes
1answer
3k 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 ...
2
votes
2answers
264 views

Problems in building higher displacement 2 stroke engines

I understand(from preliminary research) that when engine gets bigger(higher displacement) it is practically not possible to have a two stroke engine. What are the implications in building a higher cc ...
2
votes
3answers
112 views

When should we change the machine lubricant? Cold engine or hot engine?

According to the manual, we should change the lubricant when the engine is still hot to easy the lubricant flow out completely. But from other perspective, loosening the bolt at the high temperature ...
4
votes
2answers
159 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 ...
6
votes
4answers
27k views

Slow Accleration And Moving RPMs

UPDATE: I bought a scan tool and downloaded the torque app. I don't get any error codes. I decided to drive it again today. I drove about a quarter mile and barely got to 20MPH. I turned around and ...
2
votes
2answers
109 views

1997 ford f150 lariat

We have a 1997 ford f150. My husband replaced the thermostat, but it still reads cold and doesn't put out any heat. Any suggestions? We are in Ohio, it's December, and it's freeeezzzing - need heat! ...
5
votes
4answers
499 views

Engine repeatedly dies at shorter and shorter intervals this cold morning, finally won't start

I have Pontiac Grand Am 2004. It's been needing some regular maintenance, but other than that runs mostly fine. When I went out to start it this morning, it started fine. I went to start brushing snow ...
3
votes
3answers
4k 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 ...