Smokey plus black soot ?out of the exhaust of golf gti .any ideas?

Question

im i lookin at a big repair bill

yep i am using a hell of a lot of fuel

Answer 1

Once you find out what's causing the soot issues, order parts from www.autohausaz.com

I have a GL & recentlly replaced the entire exhaust & A/C sysytem. Their prices are about 50% - 60% off retail. If you can find someone reasonably priced to install them you'll save even more. Whatever you do, don't take it to the dealership to fix. They're a rip off. Let them diagnose it if necessary & get a repair estimate with part numbers.

Find someone who specializes in European cars. Price around & ask other VW owners where they get their repairs done. I did that & found a local shop that charges half the hourly rate the dealership does. And they're better :o)

Got tired of being ripped off & having my car sit in the shop for days on end because they were "too busy to get to it".

Hope this helps & Good Luck!

Answer 2

Black smoke indicates a rich fuel mixture in either a petrol or diesel engine and in most cases this is down to poor or non existant servicing. I would assume your car is a GTi TDi? If so then black smoke on a diesel like this could be a sooted up EGR (Exhaust Gas Recirculation) valve, this valve takes exhaust gas to be reburnt and if this is stuck this wont happen, the ECU for the engine will get false readings and inject more fuel, hence when you put your foot down, it's getting more fuel than can be burnt and therefore you get clouds of black smoke. A choked air filter can do similar things. On a petrol engine, this is less likely as they are generally cleaner, contrary to what the environmentallists would have you believe, but on one of these black smoke and soot would again point to an overfuelling problem, and on a modern MPi petrol engine, there are quite a few sensors to cause problems, this could be a coolant sensor not working and fooling the ECU into thinking the engine is cold and this would cause a rich mixture, or a Lambda sensor giving wrong values and again making the ECU inject too much fuel. The first step I would take would be to give the car a full service, or put it into a reputable garage to have this done, you might be surprised at the results!

Answer 3

Golf Gti Mk5 Exhaust

Answer 4

What color smoke? Is there an odor of fuel?

Usually, gray exhaust smoke is fuel from a too rich condition. A tune up with new plugs, air filter, and a FI cleaner (I like Lucas Oil's) may help - it never hurts. Sometimes, injectors don't properly atomize the fuel and its droplets don't burn (only gasoline vapor is flamable).

Black exhaust smoke is usually oil. If your bumper is all marked up with it and you're having to add motor oil (more than 500mL between changes), you're in trouble. None of the causes of oil in the combustion chamber are especially cheap to fix. Additionally, the oil smoke will destroy your catalytic converter... even more money.

Sorry if that's bad news.

Answer 5

Take it to the dealer and get a diagnostic done on it. It could be injectors, O2 sensor, coolant temp sensor, or even a stuck-open thermostat. The scan should confirm or eliminate electronic problems, remember to give them as much info as possible. Such as when the problem started, what conditions, how the car goes, fuel mileage etc.

Answer 6

ALF has it right, you got a fuel problem. it could be anything from a bad carb to clogged filters and sensores since you can't take it out on the interstate and blow the dust out of it, the next step is to take it to the shop. I'm guessing at around $150

Answer 7

Could just require a good tune, sounds as if it is burning petrol, more air needed in the carb. Get it tuned, plenty of places in yellow pages.

Answer 8

I believe you have a fuel problem or your choke could be stuck.
Somehow your getting to much fuel to the engine.

Answer 9

Could be a fuel condition, stopped up injector or bad timing.

Answer 10

Send a chirpy cockney chimney sweep up there to give it a good brushing out.