Hot answers tagged

20 votes

Why has my car burnt through all the oil?

If it is burning it's oil, the oil is getting somewhere it shouldn't do - and changing the plugs and coil will make no difference to that! As the oil smoke is coming out of the exhaust, that suggests ...
  • 28.6k
16 votes

How can I detect vacuum leaks without access to a smoke machine?

There are several methods to detect vacuum leaks of unmetered air into the fuel delivery system One method is to use soapy water in a spray gun. The real issue here is how are you going to detect a ...
  • 32.8k
14 votes

How can I detect vacuum leaks without access to a smoke machine?

One tool overlooked here is an ultrasonic leak detector. They work by listening to the noise of a leak. Obviously they would be better used in a totally quiet environment, but it's a possibility. ...
  • 6,529
10 votes

How can I detect vacuum leaks without access to a smoke machine?

Some people have stated listening for a vacuum leak noise and if located within a vicinity disconnect and add a new line of the same diameter and get a cigar and blow smoke from the cigar in the line. ...
8 votes

How can I detect vacuum leaks without access to a smoke machine?

@DucatiKiller gives a very good assessment of how to look for leaks. Using these same efforts, you can also use gas from a propane torch around the same areas described. When the gas finds a vacuum ...
8 votes

How can I detect vacuum leaks without access to a smoke machine?

One other way to look at this, sort of from a different direction. As I get older I really like being able to do more with less and do so safely. I think its sometimes awesome that an old guy with ...
  • 6,529
8 votes

How can I detect vacuum leaks without access to a smoke machine?

This is how I diagnosed a vacuum leak in my car. I removed the air filter from the intake pipe (mine was a turbocharged lancer evolution with an after market intake pipe) started the car. (Make sure ...
  • 576
8 votes

Smoke coming from hood. Car turned off . wrong coolant was added..Why wont car turn on or what could be the issue

I'm not a believer in coincidence, so I am 99.9% sure there is a relationship between the oil change and the problems you are having. It sounds like there has been a catastrophic failure of some sort, ...
  • 10.1k
7 votes

How can I detect vacuum leaks without access to a smoke machine?

Another way that has not yet been mentioned is artificially creating a vacuum or pressure in the intake. Vacuum is naturally there when the engine is working, but often the iconic hissing sound a leak ...
7 votes

Can y’all help me out. I have no idea what I’m doing

From your description, it sounds like you have a plugged catalytic converter. The glowing red exhaust pipe and lack of power is what would clue me to that.
6 votes
Accepted

What does it mean when soot is coming out of my exhaust?

There is nothing wrong, water is a byproduct of gasoline combustion. 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O where C8H18 is the gasoline reacting with oxygen (O2) and giving Carbon-dioxide (CO2) and ...
  • 381
6 votes

How can I detect vacuum leaks without access to a smoke machine?

If it's a vacuum leak, it will be sucking in air, and you'll probably be able to hear it. With the rest of the engine making noise, using something to pinpoint the sound would help: Take a piece of ...
  • 678
6 votes

How can I detect vacuum leaks without access to a smoke machine?

There are usually two parts to this diagnosis: Establish that you have a vacuum leak If confirmed, find out the source of the malaise Confirming the presence of a leak My favorite trick to ...
  • 39k
5 votes

Anyone have experience with a faulty fuel press? Regulator?

Nice engine you got there! While your issues do sound like a MAF problem (check the MAF readings via OBD!), some turbocharged Volvos are notorious for fuel pressure regulator issues. Basically the ...
5 votes

Is it unreasonable to expect nation chain mechanics to recognize a blown head gasket from a radiator problem before installing new radiator?

I would not immediately assume the repair shop was out to get you. Its possible, but not likely. PepBoys is a national chain, and their best most profitable behavior is to quickly and efficiently ...
  • 6,529
5 votes

Why has my car burnt through all the oil?

Since it's a 1.2 I'm betting it's petrol, so you don't have some of the issues that diesels suffer from. White smoke is often water. Grey/black smoke will be oil. Either way, something is getting ...
  • 1,509
5 votes

How can I detect vacuum leaks without access to a smoke machine?

I've used a stick of burning incense. Cheap and simple!
5 votes

What does it mean when soot is coming out of my exhaust?

A little water is normal especially in colder weather. It is not likely that it is coolant coming out of the exhust, if it was you'd have a lot of other symptoms. If you vehicle is leaving a ...
  • 256
5 votes
Accepted

Thick white (maybe blue) smoke from tailpipe while accelerating, then the smoke stopped and car runs normally

Per your edit, you said the mechanic replaced a PCV valve that was stuck open, causing the excessive smoking. PCV in this case stands for Positive Crankcase Ventilation. The valve is located on the ...
  • 6,017
5 votes

What could cause burning engine oil and a decreasing coolant level

I'm 99% sure it's a head gasket problem. The more you drive it, the worse it will get until you'll ruin the engine. Does the oil look like café-au-lait? or is there some oil in coolant reservoir? Only ...
  • 111
5 votes

Problems with Turbo Engine of Audi TT 1.8L 2005 150BHP

Smoke emitted from the tailpipe is likely either coolant or, more likely given the oil light, engine oil. The "wooooo" noise you described is in all likelyhood a boost leak. The wipers stopping mid-...
5 votes

Problems with Turbo Engine of Audi TT 1.8L 2005 150BHP

From the description I'd suspect turbo failure.. and I'm sorry to say that if that's the case you're looking at another big bill.
  • 9,777
4 votes
Accepted

1993 toyota 4Runner - White Smoke from under hood and neon yellow liquid leaking from somewhere

It's hard to say exactly what's going on, but you are definitely leaking anti-freeze. Since it is coming from the back of the engine, it could be a bad freeze plug, busted heater hose, or cracked ...
4 votes

Brakes Smoking After Driving

Brake dust on the rims is normal, although not usually after a short trip. It sounds like you probably have a stuck caliper. Did you replace the pads and rotors yourself? If so, did you lubricate the ...
  • 2,301
4 votes
Accepted

Given that one of the reasons diesel engine produce black smoke is overfueling, why do diesel dragster produce so much soot?

The Primary Reason for Excessive Soot in Diesel Dragsters is Incomplete Combustion Something to keep in mind regarding diesel dragsters is that they do not use any emissions equipment to more ...
  • 32.8k
4 votes

Blue smoke coming from exhaust

Yes, the blue smoke is most likely the engine burning oil. When the oil burning only happens upon startup, this is usually a sign the valve seals are no longer doing their job. Oil bypasses them as ...
4 votes

What could cause burning engine oil and a decreasing coolant level

I agree with the suggestions that it is most likely a head gasket problem – I don't think it is a turbo or a piston ring problem. In my, somewhat limited, experience the VW TDI turbos are quite long ...
  • 14.3k
4 votes

overfilled oil, can I drive 1.7 miles to get it drained?

In a word: NO! Please don't run the engine any more until you get some of it drained. You've got at least 8 quarts too much oil in the engine. This will cause damage to your engine if you run it. You ...
3 votes

Engine smoking with normal temperature gauge

You should not have a leak in your cooling system, period. You need to get the car back to the mechanic if you have a coolant leak (albeit a small one). Over time you'll continue to lose coolant when ...
  • 1,086
3 votes

Safe to buy new piston for your two wheeler engine

If the smoke being emitted from the exhaust is white with a hint of blue, it is oil. If the smoke is white with a sweet smell, it is antifreeze. As Anarach pointed out in the comments below, yours ...
  • 6,017

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